Extracting prog: 1m51.610183393s
Minimizing prog: 1h43m51.842154831s
Simplifying prog options: 0s
Extracting C: 27.477778924s
Simplifying C: 27m10.798350656s


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}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program crashed: possible deadlock in __kernfs_remove
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
write(0xffffffffffffffff, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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}}): write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
write$USERIO_CMD_SET_PORT_TYPE(0xffffffffffffffff, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(0xffffffffffffffff, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(0xffffffffffffffff, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(0xffffffffffffffff, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(0xffffffffffffffff, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r0 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r0, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, 0x0, 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, 0x0, 0x0)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, 0x0, 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, 0x0, &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', 0x0, 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, 0x0, 0x0)

program did not crash
testing program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0), 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
simplifying C reproducer
testing compiled C program (duration=6m0s, {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}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection: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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false 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$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
program crashed: possible deadlock in __kernfs_remove
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program crashed: possible deadlock in __kernfs_remove
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program crashed: possible deadlock in __kernfs_remove
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$userio-write$USERIO_CMD_SET_PORT_TYPE-write$USERIO_CMD_REGISTER-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-write$USERIO_CMD_SEND_INTERRUPT-mkdirat-mount-openat-write
detailed listing:
executing program 0:
r0 = openat$userio(0xffffffffffffff9c, &(0x7f0000000000), 0x2, 0x0)
write$USERIO_CMD_SET_PORT_TYPE(r0, &(0x7f0000000040)={0x1, 0x1}, 0x2)
write$USERIO_CMD_REGISTER(r0, &(0x7f0000000080), 0x2)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
write$USERIO_CMD_SEND_INTERRUPT(r0, 0x0, 0x0)
mkdirat(0xffffffffffffff9c, &(0x7f0000000100)='./sys\x00', 0x1ff)
mount(0x0, &(0x7f0000000100)='./sys\x00', &(0x7f0000000140)='sysfs\x00', 0x0, 0x0)
r1 = openat(0xffffffffffffff9c, &(0x7f0000000180)='./sys/bus/serio/devices/serio2/drvctl\x00', 0x1, 0x0)
write(r1, &(0x7f00000001c0)='psmouse\x00', 0x8)

program crashed: possible deadlock in __kernfs_remove
validation run: crashed=true
reproducing took 2h39m55.543069133s
repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.17/6098 is trying to acquire lock:
ffff88804e56bf08 (kn->active#66){++++}-{0:0}, at: __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579

but task is already holding lock:
ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: serio_unregister_port+0x1b/0x40 drivers/input/serio/serio.c:677

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (serio_mutex){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5908 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bc0 kernel/locking/mutex.c:821
       class_mutex_intr_constructor include/linux/mutex.h:255 [inline]
       drvctl_store+0x3c/0x350 drivers/input/serio/serio.c:360
       dev_attr_store+0x58/0x80 drivers/base/core.c:2509
       sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       new_sync_write fs/read_write.c:595 [inline]
       vfs_write+0x6af/0x1050 fs/read_write.c:687
       ksys_write+0x12a/0x250 fs/read_write.c:739
       do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
       __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
       do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
       entry_SYSENTER_compat_after_hwframe+0x84/0x8e

-> #0 (kn->active#66){++++}-{0:0}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
       check_prevs_add kernel/locking/lockdep.c:3300 [inline]
       validate_chain kernel/locking/lockdep.c:3924 [inline]
       __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5254
       lock_acquire kernel/locking/lockdep.c:5908 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
       kernfs_drain+0x4f0/0x600 fs/kernfs/dir.c:532
       __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579
       kernfs_remove_by_name_ns+0x7c/0x120 fs/kernfs/dir.c:1797
       kernfs_remove_by_name include/linux/kernfs.h:644 [inline]
       remove_files+0x96/0x1c0 fs/sysfs/group.c:28
       sysfs_remove_group+0x8b/0x1b0 fs/sysfs/group.c:328
       sysfs_remove_groups fs/sysfs/group.c:352 [inline]
       sysfs_remove_groups+0x60/0xb0 fs/sysfs/group.c:344
       device_remove_groups drivers/base/core.c:2918 [inline]
       device_remove_attrs+0x192/0x290 drivers/base/core.c:3048
       device_del+0x36e/0x9b0 drivers/base/core.c:3964
       serio_destroy_port+0x476/0x590 drivers/input/serio/serio.c:543
       serio_unregister_port+0x2b/0x40 drivers/input/serio/serio.c:680
       userio_char_release+0x91/0xe0 drivers/input/serio/userio.c:105
       __fput+0x3ff/0xb50 fs/file_table.c:512
       task_work_run+0x150/0x240 kernel/task_work.c:233
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
       exit_to_user_mode_loop+0x1d8/0x700 kernel/entry/common.c:101
       __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
       syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
       syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
       __do_fast_syscall_32+0x59f/0x8b0 arch/x86/entry/syscall_32.c:294
       do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
       entry_SYSENTER_compat_after_hwframe+0x84/0x8e

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(serio_mutex);
                               lock(kn->active#66);
                               lock(serio_mutex);
  lock(kn->active#66);

 *** DEADLOCK ***

locks held by syz.0.17/6098: 1, last CPU#2:
 #0: ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #0: ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: serio_unregister_port+0x1b/0x40 drivers/input/serio/serio.c:677

stack backtrace:
CPU: 2 UID: 0 PID: 6098 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1be kernel/locking/lockdep.c:2059
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2191
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
 check_prevs_add kernel/locking/lockdep.c:3300 [inline]
 validate_chain kernel/locking/lockdep.c:3924 [inline]
 __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5254
 lock_acquire kernel/locking/lockdep.c:5908 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
 kernfs_drain+0x4f0/0x600 fs/kernfs/dir.c:532
 __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579
 kernfs_remove_by_name_ns+0x7c/0x120 fs/kernfs/dir.c:1797
 kernfs_remove_by_name include/linux/kernfs.h:644 [inline]
 remove_files+0x96/0x1c0 fs/sysfs/group.c:28
 sysfs_remove_group+0x8b/0x1b0 fs/sysfs/group.c:328
 sysfs_remove_groups fs/sysfs/group.c:352 [inline]
 sysfs_remove_groups+0x60/0xb0 fs/sysfs/group.c:344
 device_remove_groups drivers/base/core.c:2918 [inline]
 device_remove_attrs+0x192/0x290 drivers/base/core.c:3048
 device_del+0x36e/0x9b0 drivers/base/core.c:3964
 serio_destroy_port+0x476/0x590 drivers/input/serio/serio.c:543
 serio_unregister_port+0x2b/0x40 drivers/input/serio/serio.c:680
 userio_char_release+0x91/0xe0 drivers/input/serio/userio.c:105
 __fput+0x3ff/0xb50 fs/file_table.c:512
 task_work_run+0x150/0x240 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1d8/0x700 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 __do_fast_syscall_32+0x59f/0x8b0 arch/x86/entry/syscall_32.c:294
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf6ffefec
Code: Unable to access opcode bytes at 0xf6ffefc2.
RSP: 002b:00000000ffbd8fbc EFLAGS: 00000202 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

final repro crashed as (corrupted=false):
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.0.17/6098 is trying to acquire lock:
ffff88804e56bf08 (kn->active#66){++++}-{0:0}, at: __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579

but task is already holding lock:
ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: serio_unregister_port+0x1b/0x40 drivers/input/serio/serio.c:677

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (serio_mutex){+.+.}-{4:4}:
       lock_acquire kernel/locking/lockdep.c:5908 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
       __mutex_lock_common kernel/locking/mutex.c:646 [inline]
       __mutex_lock+0x1a4/0x1bc0 kernel/locking/mutex.c:821
       class_mutex_intr_constructor include/linux/mutex.h:255 [inline]
       drvctl_store+0x3c/0x350 drivers/input/serio/serio.c:360
       dev_attr_store+0x58/0x80 drivers/base/core.c:2509
       sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
       kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
       new_sync_write fs/read_write.c:595 [inline]
       vfs_write+0x6af/0x1050 fs/read_write.c:687
       ksys_write+0x12a/0x250 fs/read_write.c:739
       do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
       __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291
       do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
       entry_SYSENTER_compat_after_hwframe+0x84/0x8e

-> #0 (kn->active#66){++++}-{0:0}:
       check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
       check_prevs_add kernel/locking/lockdep.c:3300 [inline]
       validate_chain kernel/locking/lockdep.c:3924 [inline]
       __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5254
       lock_acquire kernel/locking/lockdep.c:5908 [inline]
       lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
       kernfs_drain+0x4f0/0x600 fs/kernfs/dir.c:532
       __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579
       kernfs_remove_by_name_ns+0x7c/0x120 fs/kernfs/dir.c:1797
       kernfs_remove_by_name include/linux/kernfs.h:644 [inline]
       remove_files+0x96/0x1c0 fs/sysfs/group.c:28
       sysfs_remove_group+0x8b/0x1b0 fs/sysfs/group.c:328
       sysfs_remove_groups fs/sysfs/group.c:352 [inline]
       sysfs_remove_groups+0x60/0xb0 fs/sysfs/group.c:344
       device_remove_groups drivers/base/core.c:2918 [inline]
       device_remove_attrs+0x192/0x290 drivers/base/core.c:3048
       device_del+0x36e/0x9b0 drivers/base/core.c:3964
       serio_destroy_port+0x476/0x590 drivers/input/serio/serio.c:543
       serio_unregister_port+0x2b/0x40 drivers/input/serio/serio.c:680
       userio_char_release+0x91/0xe0 drivers/input/serio/userio.c:105
       __fput+0x3ff/0xb50 fs/file_table.c:512
       task_work_run+0x150/0x240 kernel/task_work.c:233
       resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
       __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
       exit_to_user_mode_loop+0x1d8/0x700 kernel/entry/common.c:101
       __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
       syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
       syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
       __do_fast_syscall_32+0x59f/0x8b0 arch/x86/entry/syscall_32.c:294
       do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
       entry_SYSENTER_compat_after_hwframe+0x84/0x8e

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(serio_mutex);
                               lock(kn->active#66);
                               lock(serio_mutex);
  lock(kn->active#66);

 *** DEADLOCK ***

locks held by syz.0.17/6098: 1, last CPU#2:
 #0: ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: class_mutex_constructor include/linux/mutex.h:253 [inline]
 #0: ffffffff904e2360 (serio_mutex){+.+.}-{4:4}, at: serio_unregister_port+0x1b/0x40 drivers/input/serio/serio.c:677

stack backtrace:
CPU: 2 UID: 0 PID: 6098 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1be kernel/locking/lockdep.c:2059
 check_noncircular+0x146/0x160 kernel/locking/lockdep.c:2191
 check_prev_add+0xeb/0xe60 kernel/locking/lockdep.c:3181
 check_prevs_add kernel/locking/lockdep.c:3300 [inline]
 validate_chain kernel/locking/lockdep.c:3924 [inline]
 __lock_acquire+0x1492/0x1ec0 kernel/locking/lockdep.c:5254
 lock_acquire kernel/locking/lockdep.c:5908 [inline]
 lock_acquire+0x1d1/0x380 kernel/locking/lockdep.c:5865
 kernfs_drain+0x4f0/0x600 fs/kernfs/dir.c:532
 __kernfs_remove+0x34c/0xb80 fs/kernfs/dir.c:1579
 kernfs_remove_by_name_ns+0x7c/0x120 fs/kernfs/dir.c:1797
 kernfs_remove_by_name include/linux/kernfs.h:644 [inline]
 remove_files+0x96/0x1c0 fs/sysfs/group.c:28
 sysfs_remove_group+0x8b/0x1b0 fs/sysfs/group.c:328
 sysfs_remove_groups fs/sysfs/group.c:352 [inline]
 sysfs_remove_groups+0x60/0xb0 fs/sysfs/group.c:344
 device_remove_groups drivers/base/core.c:2918 [inline]
 device_remove_attrs+0x192/0x290 drivers/base/core.c:3048
 device_del+0x36e/0x9b0 drivers/base/core.c:3964
 serio_destroy_port+0x476/0x590 drivers/input/serio/serio.c:543
 serio_unregister_port+0x2b/0x40 drivers/input/serio/serio.c:680
 userio_char_release+0x91/0xe0 drivers/input/serio/userio.c:105
 __fput+0x3ff/0xb50 fs/file_table.c:512
 task_work_run+0x150/0x240 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x1d8/0x700 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 __do_fast_syscall_32+0x59f/0x8b0 arch/x86/entry/syscall_32.c:294
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf6ffefec
Code: Unable to access opcode bytes at 0xf6ffefc2.
RSP: 002b:00000000ffbd8fbc EFLAGS: 00000202 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>