Extracting prog: 8m3.006597731s Minimizing prog: 56m45.85465897s Simplifying prog options: 0s Extracting C: 3m9.119266855s Simplifying C: 31m5.970553166s 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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:namespace 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$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$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:namespace 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$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_io_uring_setup-io_uring_enter-io_uring_enter-prctl$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 1h48m57.374519593s repro crashed as (corrupted=false): INFO: task syz.0.17:6006 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:6006 tgid:6004 ppid:5958 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5387 [inline] __schedule+0x17b4/0x5680 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x164/0x360 kernel/sched/core.c:7282 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:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [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: 0033:0x7f4d95d9c819 RSP: 002b:00007f4d96ba10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f4d96016098 RCX: 00007f4d95d9c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4d9601609c RBP: 00007f4d96016090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d96016128 R14: 00007ffc26a0d670 R15: 00007ffc26a0d758 INFO: task syz.1.18:6034 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.18 state:D stack:25800 pid:6034 tgid:6032 ppid:6009 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5387 [inline] __schedule+0x17b4/0x5680 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x164/0x360 kernel/sched/core.c:7282 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:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [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: 0033:0x7fef8d19c819 RSP: 002b:00007fef8c6540e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007fef8d416098 RCX: 00007fef8d19c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fef8d41609c RBP: 00007fef8d416090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef8d416128 R14: 00007fff6c3974a0 R15: 00007fff6c397588 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 3 locks held by kworker/1:1/42: #0: ffff88813fe57140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline] #0: ffff88813fe57140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385 #1: ffff8880b8724588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933 #2: ffffffff8f112998 (pool_lock#2){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline] #2: ffffffff8f112998 (pool_lock#2){-.-.}-{2:2}, at: free_obj_work+0x103/0x4a0 lib/debugobjects.c:515 3 locks held by kworker/u8:9/1113: #0: ffff888031bff940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline] #0: ffff888031bff940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385 #1: ffffc9000566fc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline] #1: ffffc9000566fc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385 #2: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0 net/ipv6/addrconf.c:4206 2 locks held by getty/5591: #0: ffff8880329360a0 (&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.0.17/6005: 1 lock held by syz.5.22/6150: 2 locks held by syz.6.23/6182: 1 lock held by syz.7.24/6215: 3 locks held by syz-executor/6224: #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0 net/core/rtnetlink.c:4107 #1: ffff888059219550 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x227/0x420 drivers/net/wireguard/device.c:50 #2: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #2: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961 ============================================= NMI backtrace for cpu 1 CPU: 1 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:update_curr+0x1ea/0x4e0 kernel/sched/fair.c:1412 Code: fd ff 4c 8d bb b8 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 31 6b 97 00 49 83 3f 00 75 15 48 8b 44 24 20 <48> 8d b8 f0 09 00 00 48 8b 34 24 e8 96 d1 02 00 0f 1f 44 00 00 4d RSP: 0018:ffffc90000007c90 EFLAGS: 00000046 RAX: ffff8880b863ae00 RBX: ffff88801daadcc0 RCX: 0000000000bffbff RDX: ffffffffff65a001 RSI: ffffffff8e247e65 RDI: ffff8880b863aee0 RBP: 1ffff11003b55b9d R08: ffffffff903338f7 R09: 1ffffffff206671e R10: dffffc0000000000 R11: fffffbfff206671f R12: dffffc0000000000 R13: ffff8880b863aec0 R14: ffff88801daadce8 R15: ffff88801daadd78 FS: 0000000000000000(0000) GS:ffff888125225000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffddd2fca70 CR3: 0000000033660000 CR4: 00000000003526f0 Call Trace: entity_tick kernel/sched/fair.c:5798 [inline] task_tick_fair+0x7d/0x8a0 kernel/sched/fair.c:13658 hrtick+0x199/0x2f0 kernel/sched/core.c:901 __run_hrtimer kernel/time/hrtimer.c:1930 [inline] __hrtimer_run_queues+0x375/0xa20 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:crng_make_state+0x36f/0x600 drivers/char/random.c:384 Code: e8 39 22 8f e8 d2 39 72 06 4c 89 fe e9 66 fe ff ff e8 05 2c 7f fc e8 70 92 6f 06 4d 85 f6 74 86 e8 f6 2b 7f fc fb 48 83 c4 28 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 d2 82 72 06 cc 90 e8 3b 75 66 ff RSP: 0018:ffffc90000127868 EFLAGS: 00000282 RAX: ffffffff854692ba RBX: 0000000000000000 RCX: ffff88801daadc40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff903338f7 R09: 1ffffffff206671e R10: dffffc0000000000 R11: fffffbfff206671f R12: dffffc0000000000 R13: ffff8880b8636d50 R14: 0000000000000200 R15: ffff8880b8636da0 _get_random_bytes+0xff/0x260 drivers/char/random.c:396 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:846 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x69e/0xb80 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 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 final repro crashed as (corrupted=false): INFO: task syz.0.17:6006 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:6006 tgid:6004 ppid:5958 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5387 [inline] __schedule+0x17b4/0x5680 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x164/0x360 kernel/sched/core.c:7282 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:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [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: 0033:0x7f4d95d9c819 RSP: 002b:00007f4d96ba10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f4d96016098 RCX: 00007f4d95d9c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4d9601609c RBP: 00007f4d96016090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4d96016128 R14: 00007ffc26a0d670 R15: 00007ffc26a0d758 INFO: task syz.1.18:6034 blocked for more than 145 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.18 state:D stack:25800 pid:6034 tgid:6032 ppid:6009 task_flags:0x400640 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5387 [inline] __schedule+0x17b4/0x5680 kernel/sched/core.c:7188 __schedule_loop kernel/sched/core.c:7267 [inline] schedule+0x164/0x360 kernel/sched/core.c:7282 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:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [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: 0033:0x7fef8d19c819 RSP: 002b:00007fef8c6540e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007fef8d416098 RCX: 00007fef8d19c819 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fef8d41609c RBP: 00007fef8d416090 R08: 3fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fef8d416128 R14: 00007fff6c3974a0 R15: 00007fff6c397588 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775 3 locks held by kworker/1:1/42: #0: ffff88813fe57140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline] #0: ffff88813fe57140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385 #1: ffff8880b8724588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880 kernel/sched/psi.c:933 #2: ffffffff8f112998 (pool_lock#2){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:571 [inline] #2: ffffffff8f112998 (pool_lock#2){-.-.}-{2:2}, at: free_obj_work+0x103/0x4a0 lib/debugobjects.c:515 3 locks held by kworker/u8:9/1113: #0: ffff888031bff940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline] #0: ffff888031bff940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385 #1: ffffc9000566fc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline] #1: ffffc9000566fc40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385 #2: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline] #2: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x11e/0x14c0 net/ipv6/addrconf.c:4206 2 locks held by getty/5591: #0: ffff8880329360a0 (&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.0.17/6005: 1 lock held by syz.5.22/6150: 2 locks held by syz.6.23/6182: 1 lock held by syz.7.24/6215: 3 locks held by syz-executor/6224: #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline] #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline] #0: ffffffff8fddfa00 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x883/0x1bb0 net/core/rtnetlink.c:4107 #1: ffff888059219550 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_open+0x227/0x420 drivers/net/wireguard/device.c:50 #2: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline] #2: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961 ============================================= NMI backtrace for cpu 1 CPU: 1 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 13 Comm: kworker/u8:1 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound nsim_dev_trap_report_work RIP: 0010:update_curr+0x1ea/0x4e0 kernel/sched/fair.c:1412 Code: fd ff 4c 8d bb b8 00 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 31 6b 97 00 49 83 3f 00 75 15 48 8b 44 24 20 <48> 8d b8 f0 09 00 00 48 8b 34 24 e8 96 d1 02 00 0f 1f 44 00 00 4d RSP: 0018:ffffc90000007c90 EFLAGS: 00000046 RAX: ffff8880b863ae00 RBX: ffff88801daadcc0 RCX: 0000000000bffbff RDX: ffffffffff65a001 RSI: ffffffff8e247e65 RDI: ffff8880b863aee0 RBP: 1ffff11003b55b9d R08: ffffffff903338f7 R09: 1ffffffff206671e R10: dffffc0000000000 R11: fffffbfff206671f R12: dffffc0000000000 R13: ffff8880b863aec0 R14: ffff88801daadce8 R15: ffff88801daadd78 FS: 0000000000000000(0000) GS:ffff888125225000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffddd2fca70 CR3: 0000000033660000 CR4: 00000000003526f0 Call Trace: entity_tick kernel/sched/fair.c:5798 [inline] task_tick_fair+0x7d/0x8a0 kernel/sched/fair.c:13658 hrtick+0x199/0x2f0 kernel/sched/core.c:901 __run_hrtimer kernel/time/hrtimer.c:1930 [inline] __hrtimer_run_queues+0x375/0xa20 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:crng_make_state+0x36f/0x600 drivers/char/random.c:384 Code: e8 39 22 8f e8 d2 39 72 06 4c 89 fe e9 66 fe ff ff e8 05 2c 7f fc e8 70 92 6f 06 4d 85 f6 74 86 e8 f6 2b 7f fc fb 48 83 c4 28 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 d2 82 72 06 cc 90 e8 3b 75 66 ff RSP: 0018:ffffc90000127868 EFLAGS: 00000282 RAX: ffffffff854692ba RBX: 0000000000000000 RCX: ffff88801daadc40 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffff903338f7 R09: 1ffffffff206671e R10: dffffc0000000000 R11: fffffbfff206671f R12: dffffc0000000000 R13: ffff8880b8636d50 R14: 0000000000000200 R15: ffff8880b8636da0 _get_random_bytes+0xff/0x260 drivers/char/random.c:396 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:846 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:876 [inline] nsim_dev_trap_report_work+0x69e/0xb80 drivers/net/netdevsim/dev.c:922 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 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