Extracting prog: 6m59.639471839s Minimizing prog: 55m13.354884615s Simplifying prog options: 0s Extracting C: 3m8.873187677s Simplifying C: 23m36.045360184s 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_io_uring_setup-io_uring_enter-io_uring_enter-open-mmap-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) r1 = open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0) mmap(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x27fffff, 0x4002011, r1, 0xb5ff3000) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump program crashed: INFO: task hung in vfs_coredump single: successfully extracted reproducer found reproducer with 6 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_io_uring_setup-io_uring_enter-io_uring_enter-open-mmap detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) r1 = open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0) mmap(&(0x7f0000000000/0x600000)=nil, 0x600000, 0x27fffff, 0x4002011, r1, 0xb5ff3000) 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_io_uring_setup-io_uring_enter-io_uring_enter-open-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) open(&(0x7f0000000180)='./bus\x00', 0x14927e, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump 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_io_uring_setup-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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}}): io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: io_uring_enter(0xffffffffffffffff, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(0xffffffffffffffff, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, 0x0, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, 0x0, &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), 0x0, &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), 0x0) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 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_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON 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:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = syz_io_uring_setup(0x3d1a, &(0x7f0000000480)={0x0, 0x0, 0x10000, 0x2}, &(0x7f0000000100), &(0x7f00000000c0), &(0x7f0000000000)) io_uring_enter(r0, 0x0, 0x235c, 0x3, 0x0, 0x0) io_uring_enter(r0, 0x47fa, 0x0, 0x0, 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x2, 0x2, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true reproducing took 1h38m31.981923339s repro crashed as (corrupted=false): INFO: task syz.0.17:6055 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26592 pid:6055 tgid:6053 ppid:5978 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5354 [inline] __schedule+0x165c/0x5520 kernel/sched/core.c:6966 __schedule_loop kernel/sched/core.c:7049 [inline] schedule+0x164/0x360 kernel/sched/core.c:7064 schedule_timeout+0xc3/0x2c0 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x3c0/0x690 kernel/sched/completion.c:121 wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:269 coredump_wait fs/coredump.c:537 [inline] vfs_coredump+0x9d0/0x4530 fs/coredump.c:1202 get_signal+0x1107/0x1330 kernel/signal.c:3022 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0c5679c819 RSP: 002b:00007f0c55cfe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f0c56a16098 RCX: 00007f0c5679c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0c56a1609c RBP: 00007f0c56a16090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0c56a16128 R14: 00007ffedcbfbe30 R15: 00007ffedcbfbf18 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:2/35: 5 locks held by kworker/u8:7/1052: 2 locks held by getty/5607: #0: ffff888036eb70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211 1 lock held by syz.0.17/6054: 3 locks held by syz.2.19/6108: 1 lock held by syz.3.20/6133: #0: ffff8880b873ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647 1 lock held by syz.4.21/6163: 1 lock held by syz.5.22/6201: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd3/0x1030 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6163 Comm: syz.4.21 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:task_irq_context kernel/locking/lockdep.c:4683 [inline] RIP: 0010:__lock_acquire+0x2eb/0x2cf0 kernel/locking/lockdep.c:5174 Code: 89 54 c7 20 4d 89 44 c7 08 4d 89 4c c7 10 48 8b 94 24 20 01 00 00 49 89 54 c7 18 65 8b 15 99 5b 9a 11 31 f6 85 d2 40 0f 95 c6 <31> d2 41 83 be 34 0b 00 00 00 0f 95 c2 c1 e2 0d c1 e6 0e 09 d6 8b RSP: 0018:ffffc90003667848 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000904 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff819f3e95 R09: ffff8880299da340 R10: dffffc0000000000 R11: fffffbfff206369f R12: 0000000000000000 R13: 0000000000000000 R14: ffff88807faabd00 R15: ffff88807faac850 FS: 00007fbe271b16c0(0000) GS:ffff88812535c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555687754e8 CR3: 00000000774a0000 CR4: 00000000003526f0 Call Trace: lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166 prepare_to_wait_exclusive+0x45/0x240 kernel/sched/wait.c:269 io_cqring_wait+0xb9e/0x2020 io_uring/wait.c:259 __do_sys_io_uring_enter io_uring/io_uring.c:2658 [inline] __se_sys_io_uring_enter+0x67d/0x1b00 io_uring/io_uring.c:2549 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe2639c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe271b1028 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fbe26615fa0 RCX: 00007fbe2639c819 RDX: 000000000000235c RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fbe26432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbe26616038 R14: 00007fbe26615fa0 R15: 00007ffd9c560018 final repro crashed as (corrupted=false): INFO: task syz.0.17:6055 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.17 state:D stack:26592 pid:6055 tgid:6053 ppid:5978 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5354 [inline] __schedule+0x165c/0x5520 kernel/sched/core.c:6966 __schedule_loop kernel/sched/core.c:7049 [inline] schedule+0x164/0x360 kernel/sched/core.c:7064 schedule_timeout+0xc3/0x2c0 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x3c0/0x690 kernel/sched/completion.c:121 wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:269 coredump_wait fs/coredump.c:537 [inline] vfs_coredump+0x9d0/0x4530 fs/coredump.c:1202 get_signal+0x1107/0x1330 kernel/signal.c:3022 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline] exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline] do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0c5679c819 RSP: 002b:00007f0c55cfe0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f0c56a16098 RCX: 00007f0c5679c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f0c56a1609c RBP: 00007f0c56a16090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0c56a16128 R14: 00007ffedcbfbe30 R15: 00007ffedcbfbf18 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline] #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline] #0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:2/35: 5 locks held by kworker/u8:7/1052: 2 locks held by getty/5607: #0: ffff888036eb70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211 1 lock held by syz.0.17/6054: 3 locks held by syz.2.19/6108: 1 lock held by syz.3.20/6133: #0: ffff8880b873ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150 kernel/sched/core.c:647 1 lock held by syz.4.21/6163: 1 lock held by syz.5.22/6201: ============================================= NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] __sys_info lib/sys_info.c:157 [inline] sys_info+0x135/0x170 lib/sys_info.c:165 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline] watchdog+0xfd3/0x1030 kernel/hung_task.c:561 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 6163 Comm: syz.4.21 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 RIP: 0010:task_irq_context kernel/locking/lockdep.c:4683 [inline] RIP: 0010:__lock_acquire+0x2eb/0x2cf0 kernel/locking/lockdep.c:5174 Code: 89 54 c7 20 4d 89 44 c7 08 4d 89 4c c7 10 48 8b 94 24 20 01 00 00 49 89 54 c7 18 65 8b 15 99 5b 9a 11 31 f6 85 d2 40 0f 95 c6 <31> d2 41 83 be 34 0b 00 00 00 0f 95 c2 c1 e2 0d c1 e6 0e 09 d6 8b RSP: 0018:ffffc90003667848 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000904 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff819f3e95 R09: ffff8880299da340 R10: dffffc0000000000 R11: fffffbfff206369f R12: 0000000000000000 R13: 0000000000000000 R14: ffff88807faabd00 R15: ffff88807faac850 FS: 00007fbe271b16c0(0000) GS:ffff88812535c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555687754e8 CR3: 00000000774a0000 CR4: 00000000003526f0 Call Trace: lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline] _raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166 prepare_to_wait_exclusive+0x45/0x240 kernel/sched/wait.c:269 io_cqring_wait+0xb9e/0x2020 io_uring/wait.c:259 __do_sys_io_uring_enter io_uring/io_uring.c:2658 [inline] __se_sys_io_uring_enter+0x67d/0x1b00 io_uring/io_uring.c:2549 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbe2639c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbe271b1028 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: ffffffffffffffda RBX: 00007fbe26615fa0 RCX: 00007fbe2639c819 RDX: 000000000000235c RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007fbe26432c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbe26616038 R14: 00007fbe26615fa0 R15: 00007ffd9c560018