Extracting prog: 5m57.485598561s Minimizing prog: 1h30m40.401994759s Simplifying prog options: 0s Extracting C: 31.44675099s Simplifying C: 26m28.818273386s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0) write(r1, 0x0, 0x0) r2 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r2, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: BUG: unable to handle kernel paging request in __start_dirop program crashed: BUG: unable to handle kernel paging request in __start_dirop single: successfully extracted reproducer found reproducer with 8 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write-openat detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0) write(r1, 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0) write(r1, 0x0, 0x0) write(0xffffffffffffffff, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) openat(0xffffffffffffff9c, 0x0, 0x1, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: BUG: unable to handle kernel paging request in __start_dirop testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: BUG: unable to handle kernel paging request in __start_dirop testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-mkdirat-mount-openat-write detailed listing: executing program 0: syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r0, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: syz_usb_control_io(0xffffffffffffffff, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r0, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, 0x0, 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, 0x0, &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', 0x0, 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, 0x0, 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, 0x0, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400), 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop 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}}): syz_usb_connect-syz_usb_control_io-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:5 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: INFO: task hung in i2c_tiny_usb_disconnect a never seen crash title: INFO: task hung in i2c_tiny_usb_disconnect, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: INFO: task hung in i2c_tiny_usb_disconnect a never seen crash title: INFO: task hung in i2c_tiny_usb_disconnect, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: INFO: task hung in i2c_tiny_usb_disconnect a never seen crash title: INFO: task hung in i2c_tiny_usb_disconnect, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: INFO: task hung in i2c_tiny_usb_disconnect a never seen crash title: INFO: task hung in i2c_tiny_usb_disconnect, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true 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}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write 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 compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write program crashed: BUG: unable to handle kernel paging request in __start_dirop testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: BUG: unable to handle kernel paging request in __start_dirop validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: BUG: unable to handle kernel paging request in __simple_recursive_removal validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_usb_control_io-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_usb_connect(0x0, 0x24, &(0x7f0000000000)=ANY=[@ANYBLOB="1201000200000040030431c60001000000010902120001010080320904000000ffffff00"], 0x0) syz_usb_control_io(r0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f0000000200)='./sys\x00', 0x1ff) mount(0x0, &(0x7f0000000200)='./sys\x00', &(0x7f0000000240)='sysfs\x00', 0x0, 0x0) r1 = openat(0xffffffffffffff9c, &(0x7f0000000340)='./sys/bus/i2c/devices/i2c-1/new_device\x00', 0x1, 0x0) write(r1, &(0x7f0000000400)='maxtcpc 0x40\x00', 0xd) program crashed: INFO: task hung in i2c_tiny_usb_disconnect validation run: crashed=true reproducing took 2h10m37.46118399s repro crashed as (corrupted=false): INFO: task kw INFO: task kworker/0:0:9 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4288060 flags:0x00000010 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 schedule_timeout+0xc0/0x28c kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common+0x220/0x394 kernel/sched/completion.c:132 wait_for_completion+0x18/0x24 kernel/sched/completion.c:153 i2c_del_adapter+0x34c/0x4b4 drivers/i2c/i2c-core-base.c:1840 i2c_tiny_usb_disconnect+0x4c/0xcc drivers/i2c/busses/i2c-tiny-usb.c:282 usb_unbind_interface+0x180/0x6d4 drivers/usb/core/driver.c:458 device_remove+0x114/0x134 drivers/base/dd.c:618 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372 device_release_driver+0x28/0x38 drivers/base/dd.c:1395 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:664 device_del+0x3ec/0x71c drivers/base/core.c:3961 usb_disable_device+0x24c/0x670 drivers/usb/core/message.c:1478 usb_disconnect+0x230/0x6f8 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5415 [inline] hub_port_connect_change drivers/usb/core/hub.c:5715 [inline] port_event drivers/usb/core/hub.c:5879 [inline] hub_event+0x299c/0x39fc drivers/usb/core/hub.c:5961 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 Showing all locks held in the system: 5 locks held by kworker/0:0/9: #0: ffff0000c2af0140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c2af0140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ec67c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec67c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000c95f71d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #2: ffff0000c95f71d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x128/0x39fc drivers/usb/core/hub.c:5907 #3: ffff0000db2171d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #3: ffff0000db2171d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x8c/0x6f8 drivers/usb/core/hub.c:2336 #4: ffff0000d99b31a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #4: ffff0000d99b31a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock+0x90/0xc8 drivers/base/dd.c:1171 1 lock held by khungtaskd/31: #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by pr/ttyAMA-1/41: 2 locks held by getty/4494: #0: ffff0000cf53b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009250b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 ============================================= final repro crashed as (corrupted=false): INFO: task kw INFO: task kworker/0:0:9 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:0 state:D stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4288060 flags:0x00000010 Workqueue: usb_hub_wq hub_event Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 schedule_timeout+0xc0/0x28c kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common+0x220/0x394 kernel/sched/completion.c:132 wait_for_completion+0x18/0x24 kernel/sched/completion.c:153 i2c_del_adapter+0x34c/0x4b4 drivers/i2c/i2c-core-base.c:1840 i2c_tiny_usb_disconnect+0x4c/0xcc drivers/i2c/busses/i2c-tiny-usb.c:282 usb_unbind_interface+0x180/0x6d4 drivers/usb/core/driver.c:458 device_remove+0x114/0x134 drivers/base/dd.c:618 __device_release_driver drivers/base/dd.c:1349 [inline] device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372 device_release_driver+0x28/0x38 drivers/base/dd.c:1395 bus_remove_device+0x2d0/0x400 drivers/base/bus.c:664 device_del+0x3ec/0x71c drivers/base/core.c:3961 usb_disable_device+0x24c/0x670 drivers/usb/core/message.c:1478 usb_disconnect+0x230/0x6f8 drivers/usb/core/hub.c:2345 hub_port_connect drivers/usb/core/hub.c:5415 [inline] hub_port_connect_change drivers/usb/core/hub.c:5715 [inline] port_event drivers/usb/core/hub.c:5879 [inline] hub_event+0x299c/0x39fc drivers/usb/core/hub.c:5961 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 Showing all locks held in the system: 5 locks held by kworker/0:0/9: #0: ffff0000c2af0140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c2af0140 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ec67c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec67c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000c95f71d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #2: ffff0000c95f71d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x128/0x39fc drivers/usb/core/hub.c:5907 #3: ffff0000db2171d8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #3: ffff0000db2171d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0x8c/0x6f8 drivers/usb/core/hub.c:2336 #4: ffff0000d99b31a0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline] #4: ffff0000d99b31a0 (&dev->mutex){....}-{4:4}, at: __device_driver_lock+0x90/0xc8 drivers/base/dd.c:1171 1 lock held by khungtaskd/31: #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088d271a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by pr/ttyAMA-1/41: 2 locks held by getty/4494: #0: ffff0000cf53b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009250b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 =============================================