Extracting prog: 5m3.428687337s Minimizing prog: 1h34m42.510658741s Simplifying prog options: 6m25.657095421s Extracting C: 3m13.345334799s Simplifying C: 18m29.018733342s 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: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-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: INFO: task hung in dvb_usbv2_probe single: successfully extracted reproducer found reproducer with 6 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)) pipe2$9p(&(0x7f0000000400), 0x800) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: lost connection to test machine suppressed program crash: lost connection to test machine testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, 0x0, 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, 0x0, &(0x7f0000001700)={0x0, 0x0, 0x0, 0x0}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB], &(0x7f0000001700)={0x0, 0x0, 0x0, 0x0}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], 0x0) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(0x0, 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, 0x0) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(0x0, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, 0x0, &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', 0x0, 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)) pipe2$9p(&(0x7f0000000400), 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: no output from test machine a never seen crash title: no output from test machine, ignore simplifying guilty program options testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: INFO: task hung in dvb_usbv2_probe extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd program crashed: INFO: task hung in dvb_usbv2_probe testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: INFO: task hung in dvb_usbv2_probe validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: INFO: task hung in dvb_usbv2_probe validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat-syz_usb_connect-syz_open_dev$I2C-socketpair$tipc-pipe2$9p-mount$9p_fd detailed listing: executing program 0: openat(0xffffffffffffff9c, &(0x7f0000000040)='./file1\x00', 0xd40, 0xd2) syz_usb_connect(0x5, 0x24, &(0x7f0000001280)=ANY=[@ANYBLOB="12010003001f66088f0510660548010203010902120001049570810904008100ffffff22"], &(0x7f0000001700)={0xffffffa0, 0x0, 0x0, 0x0, 0x23}) syz_open_dev$I2C(&(0x7f0000000040), 0x1, 0x2003) socketpair$tipc(0x1e, 0x5, 0x0, &(0x7f0000000040)={0xffffffffffffffff}) pipe2$9p(&(0x7f0000000400)={0xffffffffffffffff}, 0x800) mount$9p_fd(0x0, &(0x7f0000000c40)='./file1\x00', &(0x7f00000000c0), 0x200000, &(0x7f0000000680)={'trans=fd,', {'rfdno', 0x3d, r1}, 0x2c, {'wfdno', 0x3d, r0}}) program crashed: INFO: task hung in dvb_usbv2_probe validation run: crashed=true reproducing took 2h19m25.898184485s repro crashed as (corrupted=false): INFO: task kworker/1:2:89 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:21176 pid:89 tgid:89 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5360 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964 __schedule_loop kernel/sched/core.c:7046 [inline] schedule+0x165/0x360 kernel/sched/core.c:7061 schedule_timeout+0x9a/0x270 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 kernel/sched/completion.c:132 [inline] wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153 i2c_del_adapter+0x581/0x6e0 drivers/i2c/i2c-core-base.c:1814 dvb_usbv2_probe+0x4ae/0x41a0 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:993 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 5 locks held by kworker/u8:4/60: 5 locks held by kworker/1:2/89: #0: ffff8880226cd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff8880226cd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346 #1: ffffc9000259fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc9000259fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346 #2: ffff888028556198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #2: ffff888028556198 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898 #3: ffff888031e2b198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #3: ffff888031e2b198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006 #4: ffff888078bc4160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #4: ffff888078bc4160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006 2 locks held by getty/5625: #0: ffff88803400f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036c42f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 3 locks held by kworker/0:3/5957: #0: ffff88801b019948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff88801b019948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346 #1: ffffc90005417ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc90005417ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346 #2: ffff88804b9d6240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1f7/0x3b0 drivers/net/netdevsim/fib.c:1490 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0xf60/0xfa0 kernel/hung_task.c:495 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 21 21 00 f3 0f 1e fa fb f4 c8 e6 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6 RAX: 8e1443a67aac6400 RBX: ffffffff81976767 RCX: 8e1443a67aac6400 RDX: 0000000000000001 RSI: ffffffff8dc85ddb RDI: ffffffff8c056860 RBP: ffffc90000197f10 R08: ffff8880b8732fdb R09: 1ffff110170e65fb R10: dffffc0000000000 R11: ffffed10170e65fc R12: ffffffff8fe48770 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003adab58 FS: 0000000000000000(0000) GS:ffff8881258be000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7468d1140 CR3: 0000000033d80000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1e7/0x510 kernel/sched/idle.c:330 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x147 final repro crashed as (corrupted=false): INFO: task kworker/1:2:89 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:21176 pid:89 tgid:89 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5360 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6964 __schedule_loop kernel/sched/core.c:7046 [inline] schedule+0x165/0x360 kernel/sched/core.c:7061 schedule_timeout+0x9a/0x270 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 kernel/sched/completion.c:132 [inline] wait_for_completion+0x2bf/0x5d0 kernel/sched/completion.c:153 i2c_del_adapter+0x581/0x6e0 drivers/i2c/i2c-core-base.c:1814 dvb_usbv2_probe+0x4ae/0x41a0 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:993 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26d/0x9e0 drivers/base/dd.c:659 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031 bus_probe_device+0x185/0x260 drivers/base/bus.c:537 device_add+0x7b6/0xb50 drivers/base/core.c:3689 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694 hub_port_connect drivers/usb/core/hub.c:5566 [inline] hub_port_connect_change drivers/usb/core/hub.c:5706 [inline] port_event drivers/usb/core/hub.c:5870 [inline] hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Showing all locks held in the system: 1 lock held by khungtaskd/31: #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline] #0: ffffffff8e53d360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 5 locks held by kworker/u8:4/60: 5 locks held by kworker/1:2/89: #0: ffff8880226cd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff8880226cd948 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346 #1: ffffc9000259fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc9000259fba0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346 #2: ffff888028556198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #2: ffff888028556198 (&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4a20 drivers/usb/core/hub.c:5898 #3: ffff888031e2b198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #3: ffff888031e2b198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006 #4: ffff888078bc4160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:914 [inline] #4: ffff888078bc4160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x400 drivers/base/dd.c:1006 2 locks held by getty/5625: #0: ffff88803400f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900036c42f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 3 locks held by kworker/0:3/5957: #0: ffff88801b019948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline] #0: ffff88801b019948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346 #1: ffffc90005417ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline] #1: ffffc90005417ba0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346 #2: ffff88804b9d6240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1f7/0x3b0 drivers/net/netdevsim/fib.c:1490 ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline] watchdog+0xf60/0xfa0 kernel/hung_task.c:495 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82 Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 21 21 00 f3 0f 1e fa fb f4 c8 e6 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6 RAX: 8e1443a67aac6400 RBX: ffffffff81976767 RCX: 8e1443a67aac6400 RDX: 0000000000000001 RSI: ffffffff8dc85ddb RDI: ffffffff8c056860 RBP: ffffc90000197f10 R08: ffff8880b8732fdb R09: 1ffff110170e65fb R10: dffffc0000000000 R11: ffffed10170e65fc R12: ffffffff8fe48770 R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff11003adab58 FS: 0000000000000000(0000) GS:ffff8881258be000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff7468d1140 CR3: 0000000033d80000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline] default_idle+0x13/0x20 arch/x86/kernel/process.c:767 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:190 [inline] do_idle+0x1e7/0x510 kernel/sched/idle.c:330 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315 common_startup_64+0x13e/0x147