Extracting prog: 58.704661956s
Minimizing prog: 23m24.132496772s
Simplifying prog options: 2m58.04544923s
Extracting C: 55.845548655s
Simplifying C: 0s


extracting reproducer from 30 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close-openat-write-close-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)
r3 = openat(0xffffffffffffff9c, &(0x7f0000000440)='sys_mnt/block/zram0/disksize\x00', 0x1, 0x0)
write(r3, &(0x7f0000000480)='10485760', 0x8)
close(r3)
r4 = openat(0xffffffffffffff9c, &(0x7f00000004c0)='dev_mnt/zram0\x00', 0x2, 0x0)
write(r4, &(0x7f0000000500)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x40)

program crashed: KASAN: vmalloc-out-of-bounds Read in ZSTD_btGetAllMatches_dictMatchState_4
single: successfully extracted reproducer
found reproducer with 18 syscalls
minimizing guilty program
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close-openat-write-close-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)
r3 = openat(0xffffffffffffff9c, &(0x7f0000000440)='sys_mnt/block/zram0/disksize\x00', 0x1, 0x0)
write(r3, &(0x7f0000000480)='10485760', 0x8)
close(r3)
openat(0xffffffffffffff9c, &(0x7f00000004c0)='dev_mnt/zram0\x00', 0x2, 0x0)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close-openat-write-close
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)
r3 = openat(0xffffffffffffff9c, &(0x7f0000000440)='sys_mnt/block/zram0/disksize\x00', 0x1, 0x0)
write(r3, &(0x7f0000000480)='10485760', 0x8)
close(r3)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)
r3 = openat(0xffffffffffffff9c, &(0x7f0000000440)='sys_mnt/block/zram0/disksize\x00', 0x1, 0x0)
write(r3, &(0x7f0000000480)='10485760', 0x8)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)
openat(0xffffffffffffff9c, &(0x7f0000000440)='sys_mnt/block/zram0/disksize\x00', 0x1, 0x0)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write-close
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)
close(r2)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: vmalloc-out-of-bounds Write in shmem_file_read_iter
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-openat
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-close-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
close(r1)
write(0xffffffffffffffff, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: WARNING in vfree
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-openat-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-close-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
close(r0)
write(0xffffffffffffffff, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
write(r0, &(0x7f00000002c0)="00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899aabbccddeeff", 0x100)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r1, &(0x7f0000000380)='zstd', 0x4)
r2 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r2, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000280)='dict0\x00', 0x42, 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
mount(&(0x7f00000001c0)=@filename='none\x00', &(0x7f0000000200)='dev_mnt\x00', &(0x7f0000000240)='devtmpfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-mkdirat-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000180)='dev_mnt\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount-openat-write-openat-write
detailed listing:
executing program 0:
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(&(0x7f00000000c0)=@filename='none\x00', &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', 0x0, 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380), 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, 0x0, 0x0)

program did not crash
testing program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400), 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=33.003921228s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
program did not crash
simplifying guilty program options
testing program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
extracting C reproducer
testing compiled C program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
program did not crash
testing program (duration=33.003921228s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program did not crash
testing program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
validation run: crashed=true
testing program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
validation run: crashed=true
testing program (duration=33.003921228s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-write-openat-write
detailed listing:
executing program 0:
mkdirat(0xffffffffffffff9c, &(0x7f0000000080)='sys_mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='sys_mnt\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='sys_mnt/block/zram0/comp_algorithm\x00', 0x1, 0x0)
write(r0, &(0x7f0000000380)='zstd', 0x4)
r1 = openat(0xffffffffffffff9c, &(0x7f00000003c0)='sys_mnt/block/zram0/algorithm_params\x00', 0x1, 0x0)
write(r1, &(0x7f0000000400)='algo=zstd dict=dict0 level=11', 0x1d)

program crashed: KASAN: slab-use-after-free Read in algorithm_params_store
validation run: crashed=true
reproducing took 30m49.813724903s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in strcmp+0x70/0xc0 lib/string.c:272
Read of size 1 at addr ffff888117291d80 by task syz.0.2336/2719

CPU: 1 UID: 0 PID: 2719 Comm: syz.0.2336 Not tainted syzkaller #0 45964a5c932d45c81e53484b258bbb49855afb35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 print_address_description+0x71/0x210 mm/kasan/report.c:377
 print_report+0x4a/0x70 mm/kasan/report.c:481
 kasan_report+0x162/0x1a0 mm/kasan/report.c:594
 __asan_report_load1_noabort+0x18/0x20 mm/kasan/report_generic.c:378
 strcmp+0x70/0xc0 lib/string.c:272
 algorithm_params_store+0x425/0x790 drivers/block/zram/zram_drv.c:2109
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7efdd1f9de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff85200b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007efdd2225fa0 RCX: 00007efdd1f9de99
RDX: 000000000000001d RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007efdd2033eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efdd2225fac R14: 00007efdd2225fa0 R15: 00007efdd2225fa0
 </TASK>

Allocated by task 2719:
 kasan_save_stack mm/kasan/common.c:49 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
 kasan_save_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
 poison_kmalloc_redzone mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x96/0xb0 mm/kasan/common.c:396
 kasan_kmalloc include/linux/kasan.h:261 [inline]
 __do_kmalloc_node mm/slub.c:4395 [inline]
 __kmalloc_node_track_caller_noprof+0x24e/0x4f0 mm/slub.c:4414
 kstrdup+0x4d/0x130 mm/util.c:70
 __comp_algorithm_store+0x5c/0x250 drivers/block/zram/zram_drv.c:2004
 comp_algorithm_store+0x6e/0xb0 drivers/block/zram/zram_drv.c:2140
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Freed by task 2720:
 kasan_save_stack mm/kasan/common.c:49 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
 kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:249 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2445 [inline]
 slab_free mm/slub.c:4714 [inline]
 kfree+0x158/0x440 mm/slub.c:4875
 comp_algorithm_set drivers/block/zram/zram_drv.c:1979 [inline]
 __comp_algorithm_store+0x190/0x250 drivers/block/zram/zram_drv.c:2025
 comp_algorithm_store+0x6e/0xb0 drivers/block/zram/zram_drv.c:2140
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The buggy address belongs to the object at ffff888117291d80
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
 freed 8-byte region [ffff888117291d80, ffff888117291d88)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888117291f00 pfn:0x117291
anon flags: 0x4000000000000000(zone=1)
page_type: f5(slab)
raw: 4000000000000000 ffff888100041500 0000000000000000 dead000000000001
raw: ffff888117291f00 0000000080800064 00000001f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 337, tgid 337 (udevd), ts 33947263698, free_ts 33944378546
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook+0x37d/0x3b0 mm/page_alloc.c:1863
 prep_new_page+0x2d/0x180 mm/page_alloc.c:1871
 get_page_from_freelist+0x4aea/0x4ba0 mm/page_alloc.c:3948
 __alloc_pages_noprof+0x35a/0x7e0 mm/page_alloc.c:5315
 alloc_slab_page+0x6b/0x1e0 mm/slub.c:-1
 allocate_slab+0x69/0x430 mm/slub.c:2687
 new_slab mm/slub.c:2741 [inline]
 ___slab_alloc+0x591/0x8c0 mm/slub.c:3934
 __slab_alloc mm/slub.c:4025 [inline]
 __slab_alloc_node mm/slub.c:4078 [inline]
 slab_alloc_node mm/slub.c:4239 [inline]
 __do_kmalloc_node mm/slub.c:4394 [inline]
 __kmalloc_node_track_caller_noprof+0x2e3/0x4f0 mm/slub.c:4414
 kmemdup_noprof+0x31/0x80 mm/util.c:139
 kmemdup_noprof include/linux/fortify-string.h:753 [inline]
 shmem_symlink+0x1af/0x4e0 mm/shmem.c:3948
 vfs_symlink+0x3f7/0x620 fs/namei.c:4623
 do_symlinkat+0x1ba/0x400 fs/namei.c:4649
 __do_sys_symlink fs/namei.c:4670 [inline]
 __se_sys_symlink fs/namei.c:4668 [inline]
 __x64_sys_symlink+0x7e/0x90 fs/namei.c:4668
 x64_sys_call+0x28d8/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:89
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
page last free pid 1000 tgid 1000 stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1390 [inline]
 free_unref_page+0xbb8/0xf70 mm/page_alloc.c:2876
 __free_pages+0x6b/0x3b0 mm/page_alloc.c:5402
 free_pages+0x86/0x90 mm/page_alloc.c:5415
 tlb_batch_list_free mm/mmu_gather.c:160 [inline]
 tlb_finish_mmu+0x117/0x1d0 mm/mmu_gather.c:524
 exit_mmap+0x458/0xc20 mm/mmap.c:1983
 __mmput+0x92/0x330 kernel/fork.c:1370
 mmput+0x55/0x170 kernel/fork.c:1394
 exit_mm kernel/exit.c:575 [inline]
 do_exit+0x9a5/0x2850 kernel/exit.c:942
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1098
 __do_sys_exit_group kernel/exit.c:1109 [inline]
 __se_sys_exit_group kernel/exit.c:1107 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1107
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff888117291c80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff888117291d00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
>ffff888117291d80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
                   ^
 ffff888117291e00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff888117291e80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in strcmp+0x70/0xc0 lib/string.c:272
Read of size 1 at addr ffff888117291d80 by task syz.0.2336/2719

CPU: 1 UID: 0 PID: 2719 Comm: syz.0.2336 Not tainted syzkaller #0 45964a5c932d45c81e53484b258bbb49855afb35
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 print_address_description+0x71/0x210 mm/kasan/report.c:377
 print_report+0x4a/0x70 mm/kasan/report.c:481
 kasan_report+0x162/0x1a0 mm/kasan/report.c:594
 __asan_report_load1_noabort+0x18/0x20 mm/kasan/report_generic.c:378
 strcmp+0x70/0xc0 lib/string.c:272
 algorithm_params_store+0x425/0x790 drivers/block/zram/zram_drv.c:2109
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7efdd1f9de99
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff85200b18 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007efdd2225fa0 RCX: 00007efdd1f9de99
RDX: 000000000000001d RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007efdd2033eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efdd2225fac R14: 00007efdd2225fa0 R15: 00007efdd2225fa0
 </TASK>

Allocated by task 2719:
 kasan_save_stack mm/kasan/common.c:49 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
 kasan_save_alloc_info+0x3a/0x50 mm/kasan/generic.c:565
 poison_kmalloc_redzone mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x96/0xb0 mm/kasan/common.c:396
 kasan_kmalloc include/linux/kasan.h:261 [inline]
 __do_kmalloc_node mm/slub.c:4395 [inline]
 __kmalloc_node_track_caller_noprof+0x24e/0x4f0 mm/slub.c:4414
 kstrdup+0x4d/0x130 mm/util.c:70
 __comp_algorithm_store+0x5c/0x250 drivers/block/zram/zram_drv.c:2004
 comp_algorithm_store+0x6e/0xb0 drivers/block/zram/zram_drv.c:2140
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Freed by task 2720:
 kasan_save_stack mm/kasan/common.c:49 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:70
 kasan_save_free_info+0x44/0x50 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:249 [inline]
 __kasan_slab_free+0x5f/0x80 mm/kasan/common.c:266
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2445 [inline]
 slab_free mm/slub.c:4714 [inline]
 kfree+0x158/0x440 mm/slub.c:4875
 comp_algorithm_set drivers/block/zram/zram_drv.c:1979 [inline]
 __comp_algorithm_store+0x190/0x250 drivers/block/zram/zram_drv.c:2025
 comp_algorithm_store+0x6e/0xb0 drivers/block/zram/zram_drv.c:2140
 dev_attr_store+0x76/0xa0 drivers/base/core.c:2440
 sysfs_kf_write+0x141/0x160 fs/sysfs/file.c:136
 kernfs_fop_write_iter+0x316/0x510 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x762/0xfd0 fs/read_write.c:684
 ksys_write+0x145/0x260 fs/read_write.c:737
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __x64_sys_write+0x7f/0x90 fs/read_write.c:746
 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The buggy address belongs to the object at ffff888117291d80
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
 freed 8-byte region [ffff888117291d80, ffff888117291d88)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888117291f00 pfn:0x117291
anon flags: 0x4000000000000000(zone=1)
page_type: f5(slab)
raw: 4000000000000000 ffff888100041500 0000000000000000 dead000000000001
raw: ffff888117291f00 0000000080800064 00000001f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 337, tgid 337 (udevd), ts 33947263698, free_ts 33944378546
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook+0x37d/0x3b0 mm/page_alloc.c:1863
 prep_new_page+0x2d/0x180 mm/page_alloc.c:1871
 get_page_from_freelist+0x4aea/0x4ba0 mm/page_alloc.c:3948
 __alloc_pages_noprof+0x35a/0x7e0 mm/page_alloc.c:5315
 alloc_slab_page+0x6b/0x1e0 mm/slub.c:-1
 allocate_slab+0x69/0x430 mm/slub.c:2687
 new_slab mm/slub.c:2741 [inline]
 ___slab_alloc+0x591/0x8c0 mm/slub.c:3934
 __slab_alloc mm/slub.c:4025 [inline]
 __slab_alloc_node mm/slub.c:4078 [inline]
 slab_alloc_node mm/slub.c:4239 [inline]
 __do_kmalloc_node mm/slub.c:4394 [inline]
 __kmalloc_node_track_caller_noprof+0x2e3/0x4f0 mm/slub.c:4414
 kmemdup_noprof+0x31/0x80 mm/util.c:139
 kmemdup_noprof include/linux/fortify-string.h:753 [inline]
 shmem_symlink+0x1af/0x4e0 mm/shmem.c:3948
 vfs_symlink+0x3f7/0x620 fs/namei.c:4623
 do_symlinkat+0x1ba/0x400 fs/namei.c:4649
 __do_sys_symlink fs/namei.c:4670 [inline]
 __se_sys_symlink fs/namei.c:4668 [inline]
 __x64_sys_symlink+0x7e/0x90 fs/namei.c:4668
 x64_sys_call+0x28d8/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:89
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
page last free pid 1000 tgid 1000 stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1390 [inline]
 free_unref_page+0xbb8/0xf70 mm/page_alloc.c:2876
 __free_pages+0x6b/0x3b0 mm/page_alloc.c:5402
 free_pages+0x86/0x90 mm/page_alloc.c:5415
 tlb_batch_list_free mm/mmu_gather.c:160 [inline]
 tlb_finish_mmu+0x117/0x1d0 mm/mmu_gather.c:524
 exit_mmap+0x458/0xc20 mm/mmap.c:1983
 __mmput+0x92/0x330 kernel/fork.c:1370
 mmput+0x55/0x170 kernel/fork.c:1394
 exit_mm kernel/exit.c:575 [inline]
 do_exit+0x9a5/0x2850 kernel/exit.c:942
 do_group_exit+0x21f/0x2f0 kernel/exit.c:1098
 __do_sys_exit_group kernel/exit.c:1109 [inline]
 __se_sys_exit_group kernel/exit.c:1107 [inline]
 __x64_sys_exit_group+0x43/0x50 kernel/exit.c:1107
 x64_sys_call+0x2ed2/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff888117291c80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff888117291d00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
>ffff888117291d80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
                   ^
 ffff888117291e00: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
 ffff888117291e80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
==================================================================