Extracting prog: 3m58.856555377s
Minimizing prog: 27m52.062335081s
Simplifying prog options: 4m17.777319743s
Extracting C: 1m0.328180646s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: WARNING in __simple_recursive_removal
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
write(0xffffffffffffffff, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r0, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io(0xffffffffffffffff, 0x0, 0x0)
syz_usb_control_io(0xffffffffffffffff, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, 0x0, 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(0x0, 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', 0x0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00), 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
program crashed: KASAN: slab-use-after-free Read in lookup_noperm_common
a never seen crash title: KASAN: slab-use-after-free Read in lookup_noperm_common, ignore
simplifying guilty program options
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in lookup_noperm_common
a never seen crash title: KASAN: slab-use-after-free Read in lookup_noperm_common, ignore
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program did not crash
validation run: crashed=false
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in lookup_noperm_common
validation run: crashed=true
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: general protection fault in __simple_recursive_removal
validation run: crashed=true
testing program (duration=1m41.754045373s, {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}}): syz_usb_connect-mkdir-mount-openat-write-syz_usb_control_io-syz_usb_control_io-syz_usb_control_io
detailed listing:
executing program 0:
r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080fa0904"], 0x0)
mkdir(&(0x7f0000000100)='./mnt\x00', 0x1ff)
mount(0x0, &(0x7f0000000300)='./mnt\x00', &(0x7f0000000400)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000900)='./mnt/bus/i2c/devices/i2c-2/new_device\x00', 0x1, 0x0)
write(r1, &(0x7f0000000a00)='stm32g0-typec 0x3', 0x11)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)
syz_usb_control_io(r0, 0x0, 0x0)

program crashed: KASAN: slab-use-after-free Read in lookup_noperm_common
validation run: crashed=true
reproducing took 46m47.178627301s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in lookup_noperm_common+0x407/0x430 fs/namei.c:3106
Read of size 4 at addr ffff88803ef87810 by task syz.0.61/6090

CPU: 0 UID: 0 PID: 6090 Comm: syz.0.61 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 lookup_noperm_common+0x407/0x430 fs/namei.c:3106
 simple_start_creating+0x9c/0x110 fs/libfs.c:2302
 debugfs_start_creating+0xdb/0x1a0 fs/debugfs/inode.c:394
 debugfs_create_dir+0x24/0x350 fs/debugfs/inode.c:572
 i2c_device_probe+0x814/0xbf0 drivers/i2c/i2c-core-base.c:588
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 i2c_new_client_device+0xa29/0x1130 drivers/i2c/i2c-core-base.c:1019
 new_device_store+0x24b/0x530 drivers/i2c/i2c-core-base.c:1307
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f386433de99
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:00007f386399e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f38645c5fa0 RCX: 00007f386433de99
RDX: 0000000000000011 RSI: 0000200000000a00 RDI: 0000000000000004
RBP: 00007f38643d3eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f38645c6038 R14: 00007f38645c5fa0 R15: 00007ffcb9098ee8
 </TASK>

Allocated by task 4981:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4608 [inline]
 slab_alloc_node mm/slub.c:4921 [inline]
 kmem_cache_alloc_lru_noprof+0x355/0x670 mm/slub.c:4954
 __d_alloc+0x37/0x6f0 fs/dcache.c:1902
 d_alloc+0x4b/0x190 fs/dcache.c:1981
 lookup_one_qstr_excl+0xd8/0x360 fs/namei.c:1806
 __start_dirop fs/namei.c:2920 [inline]
 start_dirop+0x5c/0x90 fs/namei.c:2942
 simple_start_creating+0xcc/0x110 fs/libfs.c:2305
 debugfs_start_creating+0xdb/0x1a0 fs/debugfs/inode.c:394
 debugfs_create_dir+0x24/0x350 fs/debugfs/inode.c:572
 i2c_register_adapter+0xc14/0x1400 drivers/i2c/i2c-core-base.c:1609
 i2c_tiny_usb_probe+0x461/0x5d0 drivers/i2c/busses/i2c-tiny-usb.c:265
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_new_device+0x98d/0x1610 drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5953
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 21:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kmem_cache_free+0x187/0x6c0 mm/slub.c:6515
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core kernel/rcu/tree.c:2897 [inline]
 rcu_cpu_kthread+0x950/0x1480 kernel/rcu/tree.c:2985
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 __call_rcu_common kernel/rcu/tree.c:3159 [inline]
 call_rcu+0xee/0x8b0 kernel/rcu/tree.c:3279
 dentry_kill+0x4d3/0x880 fs/dcache.c:845
 finish_dput+0x1a/0x260 fs/dcache.c:1001
 debugfs_remove+0x5b/0x70 fs/debugfs/inode.c:781
 i2c_del_adapter+0x229/0x430 drivers/i2c/i2c-core-base.c:1829
 i2c_tiny_usb_disconnect+0x49/0xd0 drivers/i2c/busses/i2c-tiny-usb.c:282
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x449/0x560 drivers/base/bus.c:664
 device_del+0x528/0x8f0 drivers/base/core.c:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x32d/0x990 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1bb7/0x4cf0 drivers/usb/core/hub.c:5953
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb3c/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88803ef87810
 which belongs to the cache dentry of size 376
The buggy address is located 0 bytes inside of
 freed 376-byte region [ffff88803ef87810, ffff88803ef87988)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3ef86
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801c6af500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800120012 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801c6af500 dead000000000100 dead000000000122
head: 0000000000000000 0000000800120012 00000000f5000000 0000000000000000
head: 0080000000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_RECLAIMABLE|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4972, tgid 4972 (udevd), ts 53075199244
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 kmem_cache_alloc_lru_noprof+0x44d/0x670 mm/slub.c:4954
 __d_alloc+0x37/0x6f0 fs/dcache.c:1902
 d_alloc_parallel+0xde/0x16c0 fs/dcache.c:2761
 lookup_open fs/namei.c:4418 [inline]
 open_last_lookups fs/namei.c:4602 [inline]
 path_openat+0xbf0/0x3850 fs/namei.c:4854
 do_file_open+0x23e/0x4a0 fs/namei.c:4886
 do_sys_openat2+0x115/0x200 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803ef87700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803ef87780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
>ffff88803ef87800: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88803ef87880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803ef87900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in lookup_noperm_common+0x407/0x430 fs/namei.c:3106
Read of size 4 at addr ffff88803ef87810 by task syz.0.61/6090

CPU: 0 UID: 0 PID: 6090 Comm: syz.0.61 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 lookup_noperm_common+0x407/0x430 fs/namei.c:3106
 simple_start_creating+0x9c/0x110 fs/libfs.c:2302
 debugfs_start_creating+0xdb/0x1a0 fs/debugfs/inode.c:394
 debugfs_create_dir+0x24/0x350 fs/debugfs/inode.c:572
 i2c_device_probe+0x814/0xbf0 drivers/i2c/i2c-core-base.c:588
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 i2c_new_client_device+0xa29/0x1130 drivers/i2c/i2c-core-base.c:1019
 new_device_store+0x24b/0x530 drivers/i2c/i2c-core-base.c:1307
 kernfs_fop_write_iter+0x3a5/0x540 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f386433de99
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:00007f386399e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f38645c5fa0 RCX: 00007f386433de99
RDX: 0000000000000011 RSI: 0000200000000a00 RDI: 0000000000000004
RBP: 00007f38643d3eaf R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f38645c6038 R14: 00007f38645c5fa0 R15: 00007ffcb9098ee8
 </TASK>

Allocated by task 4981:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4608 [inline]
 slab_alloc_node mm/slub.c:4921 [inline]
 kmem_cache_alloc_lru_noprof+0x355/0x670 mm/slub.c:4954
 __d_alloc+0x37/0x6f0 fs/dcache.c:1902
 d_alloc+0x4b/0x190 fs/dcache.c:1981
 lookup_one_qstr_excl+0xd8/0x360 fs/namei.c:1806
 __start_dirop fs/namei.c:2920 [inline]
 start_dirop+0x5c/0x90 fs/namei.c:2942
 simple_start_creating+0xcc/0x110 fs/libfs.c:2305
 debugfs_start_creating+0xdb/0x1a0 fs/debugfs/inode.c:394
 debugfs_create_dir+0x24/0x350 fs/debugfs/inode.c:572
 i2c_register_adapter+0xc14/0x1400 drivers/i2c/i2c-core-base.c:1609
 i2c_tiny_usb_probe+0x461/0x5d0 drivers/i2c/busses/i2c-tiny-usb.c:265
 usb_probe_interface+0x788/0xe50 drivers/usb/core/driver.c:399
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_set_configuration+0x1ad8/0x2180 drivers/usb/core/message.c:2268
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c3/0x3b0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __device_attach_driver+0x270/0x410 drivers/base/dd.c:1026
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c7/0x450 drivers/base/dd.c:1098
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1153
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:620
 device_add+0x7d7/0xb80 drivers/base/core.c:3772
 usb_new_device+0x98d/0x1610 drivers/usb/core/hub.c:2695
 hub_port_connect drivers/usb/core/hub.c:5567 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x28cf/0x4cf0 drivers/usb/core/hub.c:5953
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb05/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 21:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2706 [inline]
 slab_free mm/slub.c:6388 [inline]
 kmem_cache_free+0x187/0x6c0 mm/slub.c:6515
 rcu_do_batch kernel/rcu/tree.c:2645 [inline]
 rcu_core kernel/rcu/tree.c:2897 [inline]
 rcu_cpu_kthread+0x950/0x1480 kernel/rcu/tree.c:2985
 smpboot_thread_fn+0x57c/0xa80 kernel/smpboot.c:160
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:57
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:556
 __call_rcu_common kernel/rcu/tree.c:3159 [inline]
 call_rcu+0xee/0x8b0 kernel/rcu/tree.c:3279
 dentry_kill+0x4d3/0x880 fs/dcache.c:845
 finish_dput+0x1a/0x260 fs/dcache.c:1001
 debugfs_remove+0x5b/0x70 fs/debugfs/inode.c:781
 i2c_del_adapter+0x229/0x430 drivers/i2c/i2c-core-base.c:1829
 i2c_tiny_usb_disconnect+0x49/0xd0 drivers/i2c/busses/i2c-tiny-usb.c:282
 usb_unbind_interface+0x295/0x9f0 drivers/usb/core/driver.c:461
 device_remove drivers/base/dd.c:618 [inline]
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x4f5/0x880 drivers/base/dd.c:1372
 bus_remove_device+0x449/0x560 drivers/base/bus.c:664
 device_del+0x528/0x8f0 drivers/base/core.c:3961
 usb_disable_device+0x3d4/0x8d0 drivers/usb/core/message.c:1478
 usb_disconnect+0x32d/0x990 drivers/usb/core/hub.c:2345
 hub_port_connect drivers/usb/core/hub.c:5407 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
 port_event drivers/usb/core/hub.c:5871 [inline]
 hub_event+0x1bb7/0x4cf0 drivers/usb/core/hub.c:5953
 process_one_work+0xaaf/0x1480 kernel/workqueue.c:3379
 process_scheduled_works kernel/workqueue.c:3462 [inline]
 worker_thread+0xb3c/0x10d0 kernel/workqueue.c:3543
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88803ef87810
 which belongs to the cache dentry of size 376
The buggy address is located 0 bytes inside of
 freed 376-byte region [ffff88803ef87810, ffff88803ef87988)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3ef86
head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88801c6af500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000800120012 00000000f5000000 0000000000000000
head: 0080000000000040 ffff88801c6af500 dead000000000100 dead000000000122
head: 0000000000000000 0000000800120012 00000000f5000000 0000000000000000
head: 0080000000000001 ffffffffffffff81 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000002
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_RECLAIMABLE|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4972, tgid 4972 (udevd), ts 53075199244
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x264c/0x26c0 mm/page_alloc.c:3955
 __alloc_frozen_pages_noprof+0x222/0x5b0 mm/page_alloc.c:5394
 alloc_slab_page mm/slub.c:3295 [inline]
 allocate_slab+0x7c/0x5e0 mm/slub.c:3410
 new_slab mm/slub.c:3456 [inline]
 refill_objects+0x2d8/0x350 mm/slub.c:7321
 refill_sheaf mm/slub.c:2833 [inline]
 __pcs_replace_empty_main+0x330/0x690 mm/slub.c:4699
 alloc_from_pcs mm/slub.c:4775 [inline]
 slab_alloc_node mm/slub.c:4909 [inline]
 kmem_cache_alloc_lru_noprof+0x44d/0x670 mm/slub.c:4954
 __d_alloc+0x37/0x6f0 fs/dcache.c:1902
 d_alloc_parallel+0xde/0x16c0 fs/dcache.c:2761
 lookup_open fs/namei.c:4418 [inline]
 open_last_lookups fs/namei.c:4602 [inline]
 path_openat+0xbf0/0x3850 fs/namei.c:4854
 do_file_open+0x23e/0x4a0 fs/namei.c:4886
 do_sys_openat2+0x115/0x200 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x17b/0x530 arch/x86/entry/syscall_64.c:85
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803ef87700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88803ef87780: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
>ffff88803ef87800: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88803ef87880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803ef87900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================