Extracting prog: 2m35.648460906s
Minimizing prog: 41m45.25405726s
Simplifying prog options: 0s
Extracting C: 2m27.908307287s
Simplifying C: 13m9.182990462s


extracting reproducer from 32 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-ioctl$BLKPBSZGET-syz_open_dev$dvb_frontend-mq_timedsend-pselect6-close_range
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
r0 = openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r1 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r1, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$BLKPBSZGET(0xffffffffffffffff, 0x127b, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)
mq_timedsend(0xffffffffffffffff, &(0x7f0000000100), 0x0, 0x0, 0x0)
pselect6(0x40, &(0x7f00000001c0)={0x0, 0xff00000000000000, 0x5, 0xfffffffffffffffd, 0x8001, 0x0, 0x1000001000, 0x45}, 0x0, &(0x7f0000000080)={0x3ff, 0x4, 0x100000, 0x9, 0x0, 0x10, 0x80000002}, 0x0, 0x0)
close_range(r0, 0xffffffffffffffff, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
single: successfully extracted reproducer
found reproducer with 16 syscalls
minimizing guilty program
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-ioctl$BLKPBSZGET-syz_open_dev$dvb_frontend-mq_timedsend-pselect6
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$BLKPBSZGET(0xffffffffffffffff, 0x127b, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)
mq_timedsend(0xffffffffffffffff, &(0x7f0000000100), 0x0, 0x0, 0x0)
pselect6(0x40, &(0x7f00000001c0)={0x0, 0xff00000000000000, 0x5, 0xfffffffffffffffd, 0x8001, 0x0, 0x1000001000, 0x45}, 0x0, &(0x7f0000000080)={0x3ff, 0x4, 0x100000, 0x9, 0x0, 0x10, 0x80000002}, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-ioctl$BLKPBSZGET-syz_open_dev$dvb_frontend-mq_timedsend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$BLKPBSZGET(0xffffffffffffffff, 0x127b, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)
mq_timedsend(0xffffffffffffffff, &(0x7f0000000100), 0x0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-ioctl$BLKPBSZGET-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$BLKPBSZGET(0xffffffffffffffff, 0x127b, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-ioctl$BLKPBSZGET
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
ioctl$BLKPBSZGET(0xffffffffffffffff, 0x127b, 0x0)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-writev-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
r0 = syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
writev(r0, &(0x7f0000000840)=[{&(0x7f00000002c0)="94", 0xf000}, {0x0}], 0x2)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-prctl$PR_SET_MM-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
prctl$PR_SET_MM(0x23, 0x3, &(0x7f0000ffd000/0x1000)=nil)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$sndmidi-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
syz_open_dev$sndmidi(&(0x7f00000004c0), 0x2, 0x8081)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-openat$sequencer-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
openat$sequencer(0xffffffffffffff9c, &(0x7f0000000300), 0x80200, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_init_net_socket$rose-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_init_net_socket$rose(0xb, 0x5, 0x0)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KFENCE: use-after-free read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-prlimit64-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prctl$PR_SCHED_CORE-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-openat$ptmx-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptp0-prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
openat$ptp0(0xffffffffffffff9c, &(0x7f00000000c0), 0xc0542, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, 0x0)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, 0x0, 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program did not crash
testing program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(0x0, 0x0, 0xe82)

program did not crash
extracting C reproducer
testing compiled C program (duration=46.050023772s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
simplifying C reproducer
testing compiled C program (duration=46.050023772s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program did not crash
testing compiled C program (duration=46.050023772s, {Threaded:true 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program did not crash
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KFENCE: use-after-free read in dvb_device_open
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KFENCE: use-after-free read in dvb_device_open
testing compiled C program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
program crashed: KASAN: slab-use-after-free Read in dvb_device_open
testing program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
testing program (duration=46.050023772s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): prctl$PR_SCHED_CORE-prlimit64-sched_setscheduler-bpf$MAP_CREATE-syz_open_dev$dvb_frontend
detailed listing:
executing program 0:
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000380)={0x8, 0x100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000200)=0x5)
bpf$MAP_CREATE(0x0, &(0x7f00000000c0)=ANY=[@ANYBLOB="0500000003f01f00040000009a000000"], 0x48)
syz_open_dev$dvb_frontend(&(0x7f00000003c0), 0x0, 0xe82)

program crashed: KASAN: slab-use-after-free Read in dvb_device_open
validation run: crashed=true
reproducing took 1h3m58.90810127s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0xca/0x370 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff888144e7d218 by task syz.0.19/5939

CPU: 0 PID: 5939 Comm: syz.0.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:468
 kasan_report+0x117/0x150 mm/kasan/report.c:581
 dvb_device_open+0xca/0x370 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x5cc/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3640 [inline]
 path_openat+0x27f1/0x3230 fs/namei.c:3797
 do_filp_open+0x1f5/0x430 fs/namei.c:3824
 do_sys_openat2+0x134/0x1d0 fs/open.c:1421
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fee8395cfce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fee82ffdb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fee82ffe6c0 RCX: 00007fee8395cfce
RDX: 0000000000000e82 RSI: 00007fee82ffdc00 RDI: ffffffffffffff9c
RBP: 00007fee82ffdc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fee83c16128 R14: 00007fee83c16090 R15: 00007ffe821253a8
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 dvb_register_device+0x2fd/0x2210 drivers/media/dvb-core/dvbdev.c:475
 dvb_register_frontend+0x649/0x930 drivers/media/dvb-core/dvb_frontend.c:3056
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:436 [inline]
 vidtv_bridge_probe+0x9ab/0xf80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:508
 platform_probe+0x13b/0x1c0 drivers/base/platform.c:1404
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x25b/0xb20 drivers/base/dd.c:658
 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:800
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:830
 __driver_attach+0x44e/0x6e0 drivers/base/dd.c:1216
 bus_for_each_dev+0x235/0x2b0 drivers/base/bus.c:370
 bus_add_driver+0x340/0x630 drivers/base/bus.c:675
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 vidtv_bridge_init+0x3d/0x70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:598
 do_one_initcall+0x242/0x790 init/main.c:1250
 do_initcall_level+0x137/0x1f0 init/main.c:1312
 do_initcalls+0x69/0xd0 init/main.c:1328
 kernel_init_freeable+0x3ed/0x580 init/main.c:1565
 kernel_init+0x1d/0x1c0 init/main.c:1455
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293

Freed by task 5935:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1811 [inline]
 slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
 dvb_free_device drivers/media/dvb-core/dvbdev.c:619 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:632 [inline]
 dvb_device_open+0x2ee/0x370 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x5cc/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3640 [inline]
 path_openat+0x27f1/0x3230 fs/namei.c:3797
 do_filp_open+0x1f5/0x430 fs/namei.c:3824
 do_sys_openat2+0x134/0x1d0 fs/open.c:1421
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888144e7d200
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 freed 256-byte region [ffff888144e7d200, ffff888144e7d300)

The buggy address belongs to the physical page:
page:ffffea0005139f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144e7c
head:ffffea0005139f00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000840(slab|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 057ff00000000840 ffff888017c41b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 16248450286, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2120
 alloc_slab_page+0x5d/0x160 mm/slub.c:1881
 allocate_slab mm/slub.c:2028 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:2081
 ___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253
 __slab_alloc mm/slub.c:3339 [inline]
 __slab_alloc_node mm/slub.c:3392 [inline]
 slab_alloc_node mm/slub.c:3485 [inline]
 __kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 bus_add_driver+0x162/0x630 drivers/base/bus.c:659
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1062
 do_one_initcall+0x242/0x790 init/main.c:1250
 do_initcall_level+0x137/0x1f0 init/main.c:1312
 do_initcalls+0x69/0xd0 init/main.c:1328
 kernel_init_freeable+0x3ed/0x580 init/main.c:1565
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888144e7d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888144e7d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888144e7d200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888144e7d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888144e7d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in dvb_device_open+0xca/0x370 drivers/media/dvb-core/dvbdev.c:99
Read of size 8 at addr ffff888144e7d218 by task syz.0.19/5939

CPU: 0 PID: 5939 Comm: syz.0.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xa8/0x210 mm/kasan/report.c:468
 kasan_report+0x117/0x150 mm/kasan/report.c:581
 dvb_device_open+0xca/0x370 drivers/media/dvb-core/dvbdev.c:99
 chrdev_open+0x5cc/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3640 [inline]
 path_openat+0x27f1/0x3230 fs/namei.c:3797
 do_filp_open+0x1f5/0x430 fs/namei.c:3824
 do_sys_openat2+0x134/0x1d0 fs/open.c:1421
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fee8395cfce
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fee82ffdb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fee82ffe6c0 RCX: 00007fee8395cfce
RDX: 0000000000000e82 RSI: 00007fee82ffdc00 RDI: ffffffffffffff9c
RBP: 00007fee82ffdc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fee83c16128 R14: 00007fee83c16090 R15: 00007ffe821253a8
 </TASK>

Allocated by task 1:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 ____kasan_kmalloc mm/kasan/common.c:375 [inline]
 __kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:384
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 dvb_register_device+0x2fd/0x2210 drivers/media/dvb-core/dvbdev.c:475
 dvb_register_frontend+0x649/0x930 drivers/media/dvb-core/dvb_frontend.c:3056
 vidtv_bridge_dvb_init drivers/media/test-drivers/vidtv/vidtv_bridge.c:436 [inline]
 vidtv_bridge_probe+0x9ab/0xf80 drivers/media/test-drivers/vidtv/vidtv_bridge.c:508
 platform_probe+0x13b/0x1c0 drivers/base/platform.c:1404
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x25b/0xb20 drivers/base/dd.c:658
 __driver_probe_device+0x18c/0x330 drivers/base/dd.c:800
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:830
 __driver_attach+0x44e/0x6e0 drivers/base/dd.c:1216
 bus_for_each_dev+0x235/0x2b0 drivers/base/bus.c:370
 bus_add_driver+0x340/0x630 drivers/base/bus.c:675
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 vidtv_bridge_init+0x3d/0x70 drivers/media/test-drivers/vidtv/vidtv_bridge.c:598
 do_one_initcall+0x242/0x790 init/main.c:1250
 do_initcall_level+0x137/0x1f0 init/main.c:1312
 do_initcalls+0x69/0xd0 init/main.c:1328
 kernel_init_freeable+0x3ed/0x580 init/main.c:1565
 kernel_init+0x1d/0x1c0 init/main.c:1455
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293

Freed by task 5935:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:164 [inline]
 slab_free_hook mm/slub.c:1811 [inline]
 slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
 slab_free mm/slub.c:3830 [inline]
 __kmem_cache_free+0xba/0x1e0 mm/slub.c:3843
 dvb_free_device drivers/media/dvb-core/dvbdev.c:619 [inline]
 kref_put include/linux/kref.h:65 [inline]
 dvb_device_put drivers/media/dvb-core/dvbdev.c:632 [inline]
 dvb_device_open+0x2ee/0x370 drivers/media/dvb-core/dvbdev.c:113
 chrdev_open+0x5cc/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3640 [inline]
 path_openat+0x27f1/0x3230 fs/namei.c:3797
 do_filp_open+0x1f5/0x430 fs/namei.c:3824
 do_sys_openat2+0x134/0x1d0 fs/open.c:1421
 do_sys_open fs/open.c:1436 [inline]
 __do_sys_openat fs/open.c:1452 [inline]
 __se_sys_openat fs/open.c:1447 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1447
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888144e7d200
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 24 bytes inside of
 freed 256-byte region [ffff888144e7d200, ffff888144e7d300)

The buggy address belongs to the physical page:
page:ffffea0005139f00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144e7c
head:ffffea0005139f00 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000840(slab|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 057ff00000000840 ffff888017c41b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 16248450286, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1c1/0x200 mm/page_alloc.c:1581
 prep_new_page mm/page_alloc.c:1588 [inline]
 get_page_from_freelist+0x1951/0x19e0 mm/page_alloc.c:3220
 __alloc_pages+0x1f0/0x460 mm/page_alloc.c:4486
 alloc_page_interleave+0x24/0x1e0 mm/mempolicy.c:2120
 alloc_slab_page+0x5d/0x160 mm/slub.c:1881
 allocate_slab mm/slub.c:2028 [inline]
 new_slab+0x87/0x2d0 mm/slub.c:2081
 ___slab_alloc+0xc5d/0x12f0 mm/slub.c:3253
 __slab_alloc mm/slub.c:3339 [inline]
 __slab_alloc_node mm/slub.c:3392 [inline]
 slab_alloc_node mm/slub.c:3485 [inline]
 __kmem_cache_alloc_node+0x19e/0x250 mm/slub.c:3534
 kmalloc_trace+0x2a/0xe0 mm/slab_common.c:1098
 kmalloc include/linux/slab.h:600 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 bus_add_driver+0x162/0x630 drivers/base/bus.c:659
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 usb_register_driver+0x206/0x3d0 drivers/usb/core/driver.c:1062
 do_one_initcall+0x242/0x790 init/main.c:1250
 do_initcall_level+0x137/0x1f0 init/main.c:1312
 do_initcalls+0x69/0xd0 init/main.c:1328
 kernel_init_freeable+0x3ed/0x580 init/main.c:1565
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888144e7d100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888144e7d180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888144e7d200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888144e7d280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888144e7d300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================