Extracting prog: 1m0.112953013s Minimizing prog: 10m2.785803121s Simplifying prog options: 0s Extracting C: 33.550367246s Simplifying C: 5m13.956270777s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 45s testing program (duration=45s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: single: successfully extracted reproducer found reproducer with 4 syscalls minimizing guilty program testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mount-chdir-chdir detailed listing: executing program 0: mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(0x0, 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, 0x0, &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', 0x0, 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(0x0) chdir(&(0x7f00000000c0)='./bus\x00') program did not crash testing program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(0x0) program did not crash extracting C reproducer testing compiled C program (duration=1m6.925819356s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: simplifying C reproducer testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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: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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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}}): mkdir-mount-chdir-chdir program did not crash testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB: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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true 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}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true testing program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true testing program (duration=1m6.925819356s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-mount-chdir-chdir detailed listing: executing program 0: mkdir(&(0x7f0000000540)='./file0\x00', 0x0) mount(0x0, &(0x7f0000000180)='./file0\x00', &(0x7f0000000080)='sysfs\x00', 0x1214040, 0x0) chdir(&(0x7f00000004c0)='./file0\x00') chdir(&(0x7f00000000c0)='./bus\x00') program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true reproducing took 18m54.666609038s repro crashed as (corrupted=false): panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 688 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0002b8f50, 0xc000ee38d8) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x314 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000390c60, 0xc0002b8f30, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x4eb gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc000390c60, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x37b gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc0011a6bb0) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x4d gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc000c8acf0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0x116 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc000c8acf0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/vfs/dentry.go:156 +0x68 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc00092c580?, 0xc000c8acf0?}, {0x21b8b30, 0xc0014d0588}) pkg/sentry/vfs/vfs.go:1114 +0x5b gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc0012cdac0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/kernel/fs_context.go:73 +0x16d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x59 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc0012cdac0, 0xc000ee3d10) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc0012cdac0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/kernel/fs_context.go:86 +0xa5 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc0014d0588?, 0xc0014d0588) pkg/sentry/kernel/task_exit.go:301 +0x7d3 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0014d0588, 0x4d) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 661 pkg/sentry/kernel/task_start.go:416 +0x17e known lock chain: kernfs.filesystemRWMutex -> kernel.taskMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskMutex ===== goroutine 139 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskMutex).Lock(0xc0009389a0) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/task_mutex.go:35 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetNetworkNamespace(0xc000938008) pkg/sentry/kernel/task_net.go:48 +0x4d gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskNetDir(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000938008) pkg/sentry/fsimpl/proc/task_net.go:47 +0x132 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000938008, 0xc00045b110, 0x1, 0x0) pkg/sentry/fsimpl/proc/task.go:77 +0x12d3 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0xc00065b008, {0x21b8b30, 0xc000938008}, {0x1fa0af5, 0x1}) pkg/sentry/fsimpl/proc/tasks.go:147 +0x3c6 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc0000045e0, 0xc0009e2b40, {0x1fa0af5, 0x1}) pkg/sentry/fsimpl/kernfs/filesystem.go:127 +0x3eb gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908, 0xc0009e2b40) pkg/sentry/fsimpl/kernfs/filesystem.go:74 +0x459 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0x106 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908) pkg/sentry/fsimpl/kernfs/filesystem.go:696 +0x14a gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc0000045e0, {0x21b8b30, 0xc000938008}, 0xc0001785a0, 0xc000863598) pkg/sentry/vfs/vfs.go:512 +0x109 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000938008, 0xffffff9c, 0xc0000b8070, 0xc0000cad00, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x305 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000938008, 0xca?, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0xc6 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000938008) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000938008?, 0xc000938008) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000938008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x17e ====== kernel.taskMutex -> kernel.fsContextMutex ===== goroutine 295 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc00042b3c8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).Fork(0xc00042b3c0) pkg/sentry/kernel/fs_context.go:95 +0x65 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Unshare(0xc000a47208, 0x20000) pkg/sentry/kernel/task_clone.go:706 +0x1207 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Unshare(0xc000a47208, 0x489e31?, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/syscalls/linux/sys_thread.go:453 +0xd5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000a47208) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000a47208?, 0xc000a47208) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000a47208, 0x19) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 309 pkg/sentry/kernel/task_start.go:416 +0x17e final repro crashed as (corrupted=false): panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 688 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0002b8f50, 0xc000ee38d8) bazel-out/k8-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x314 gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000390c60, 0xc0002b8f30, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x4eb gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc000390c60, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x37b gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc0011a6bb0) bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x4d gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc000c8acf0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0x116 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc000c8acf0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/vfs/dentry.go:156 +0x68 gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc00092c580?, 0xc000c8acf0?}, {0x21b8b30, 0xc0014d0588}) pkg/sentry/vfs/vfs.go:1114 +0x5b gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc0012cdac0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/kernel/fs_context.go:73 +0x16d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x59 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc0012cdac0, 0xc000ee3d10) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xb4 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc0012cdac0, {0x21b8b30, 0xc0014d0588}) pkg/sentry/kernel/fs_context.go:86 +0xa5 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc0014d0588?, 0xc0014d0588) pkg/sentry/kernel/task_exit.go:301 +0x7d3 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0014d0588, 0x4d) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 661 pkg/sentry/kernel/task_start.go:416 +0x17e known lock chain: kernfs.filesystemRWMutex -> kernel.taskMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskMutex ===== goroutine 139 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskMutex).Lock(0xc0009389a0) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/task_mutex.go:35 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetNetworkNamespace(0xc000938008) pkg/sentry/kernel/task_net.go:48 +0x4d gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskNetDir(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000938008) pkg/sentry/fsimpl/proc/task_net.go:47 +0x132 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).newTaskInode(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000938008, 0xc00045b110, 0x1, 0x0) pkg/sentry/fsimpl/proc/task.go:77 +0x12d3 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*tasksInode).Lookup(0xc00065b008, {0x21b8b30, 0xc000938008}, {0x1fa0af5, 0x1}) pkg/sentry/fsimpl/proc/tasks.go:147 +0x3c6 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).revalidateChildLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc0000045e0, 0xc0009e2b40, {0x1fa0af5, 0x1}) pkg/sentry/fsimpl/kernfs/filesystem.go:127 +0x3eb gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908, 0xc0009e2b40) pkg/sentry/fsimpl/kernfs/filesystem.go:74 +0x459 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0x106 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc0003e66c0, {0x21b8b30, 0xc000938008}, 0xc000662908) pkg/sentry/fsimpl/kernfs/filesystem.go:696 +0x14a gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc0000045e0, {0x21b8b30, 0xc000938008}, 0xc0001785a0, 0xc000863598) pkg/sentry/vfs/vfs.go:512 +0x109 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000938008, 0xffffff9c, 0xc0000b8070, 0xc0000cad00, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x305 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000938008, 0xca?, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0xc6 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000938008, 0x10b, {{0xffffffffffffff9c}, {0xc0000b8070}, {0xc0000cad00}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000938008) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000938008?, 0xc000938008) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000938008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x17e ====== kernel.taskMutex -> kernel.fsContextMutex ===== goroutine 295 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc00042b3c8) bazel-out/k8-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x4d gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).Fork(0xc00042b3c0) pkg/sentry/kernel/fs_context.go:95 +0x65 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Unshare(0xc000a47208, 0x20000) pkg/sentry/kernel/task_clone.go:706 +0x1207 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Unshare(0xc000a47208, 0x489e31?, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/syscalls/linux/sys_thread.go:453 +0xd5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb90 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000a47208, 0x110, {{0x20000}, {0x7}, {0x7eb601ef2af0}, {0x0}, {0x0}, {0x55b731c406c0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000a47208) pkg/sentry/kernel/task_syscall.go:258 +0x53e gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000a47208?, 0xc000a47208) pkg/sentry/kernel/task_run.go:269 +0x220c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000a47208, 0x19) pkg/sentry/kernel/task_run.go:97 +0x402 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 309 pkg/sentry/kernel/task_start.go:416 +0x17e