Extracting prog: 5m13.190929831s Minimizing prog: 30m3.943563462s Simplifying prog options: 0s Extracting C: 1m17.320871375s Simplifying C: 17m44.561802673s 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}}): mprotect-syz_open_procfs-fchdir-setsockopt$inet_pktinfo-ioctl$BTRFS_IOC_DEFAULT_SUBVOL detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) setsockopt$inet_pktinfo(0xffffffffffffffff, 0x0, 0x8, 0x0, 0x0) ioctl$BTRFS_IOC_DEFAULT_SUBVOL(r0, 0x40089413, 0x0) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 5m0s testing program (duration=5m0s, {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}}): mprotect-syz_open_procfs-fchdir-setsockopt$inet_pktinfo-ioctl$BTRFS_IOC_DEFAULT_SUBVOL detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) setsockopt$inet_pktinfo(0xffffffffffffffff, 0x0, 0x8, 0x0, 0x0) ioctl$BTRFS_IOC_DEFAULT_SUBVOL(r0, 0x40089413, 0x0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: single: successfully extracted reproducer found reproducer with 5 syscalls minimizing guilty program testing program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir-setsockopt$inet_pktinfo detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) setsockopt$inet_pktinfo(0xffffffffffffffff, 0x0, 0x8, 0x0, 0x0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') program did not crash testing program (duration=5m41.130631278s, {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}}): mprotect-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) fchdir(0xffffffffffffffff) program did not crash testing program (duration=5m41.130631278s, {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}}): syz_open_procfs-fchdir detailed listing: executing program 0: r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) program did not crash testing program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, 0x0) fchdir(r0) program did not crash extracting C reproducer testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: simplifying C reproducer testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program did not crash testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing compiled C program (duration=5m41.130631278s, {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}}): mprotect-syz_open_procfs-fchdir program did not crash testing compiled C program (duration=5m41.130631278s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-syz_open_procfs-fchdir program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: testing program (duration=5m41.130631278s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-syz_open_procfs-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true testing program (duration=5m41.130631278s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-syz_open_procfs-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true testing program (duration=5m41.130631278s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-syz_open_procfs-fchdir detailed listing: executing program 0: mprotect(&(0x7f0000000000/0x3000)=nil, 0x3000, 0x1) r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='coredump_filter\x00') fchdir(r0) program crashed: panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: validation run: crashed=true reproducing took 1h5m30.282755856s repro crashed as (corrupted=false): panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 592 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000122260, 0xc0011d38a0) bazel-out/aarch64-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x29c gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000213050, 0xc000122240, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x3a0 gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc000213050, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x2fc gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc001277790) bazel-out/aarch64-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x50 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0015d8630, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0xe8 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc0015d8630, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/vfs/dentry.go:156 +0x6c gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0001aab00?, 0xc0015d8630?}, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/vfs/vfs.go:1114 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc000d60a80, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/kernel/fs_context.go:73 +0x120 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc000d60a80, 0xc0011d3cf8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xa0 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc000d60a80, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/kernel/fs_context.go:86 +0x90 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc0007dcc88?, 0xc0007dcc88) pkg/sentry/kernel/task_exit.go:301 +0x5cc gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0007dcc88, 0x48) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 561 pkg/sentry/kernel/task_start.go:416 +0x160 known lock chain: kernfs.filesystemRWMutex -> kernel.taskSetRWMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskSetRWMutex ===== goroutine 133 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskSetRWMutex).RLock(0xc0005be000) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/taskset_mutex.go:59 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IDOfThreadGroup(0xc0001b02a0, 0xc000464c08) pkg/sentry/kernel/threads.go:328 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Readlink(0xc000200150, {0x1d61bb8, 0xc000370008}, 0xb51c0c?) pkg/sentry/fsimpl/proc/tasks_files.go:62 +0xa4 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Getlink(0xc000200150, {0x1d61bb8, 0xc000370008}, 0xc000838420) pkg/sentry/fsimpl/proc/tasks_files.go:70 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88, 0xc000a5d050) pkg/sentry/fsimpl/kernfs/filesystem.go:83 +0x49c gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0xe8 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88) pkg/sentry/fsimpl/kernfs/filesystem.go:696 +0xd4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc0001ec600, {0x1d61bb8, 0xc000370008}, 0xc0000f63c0, 0xc0000475a0) pkg/sentry/vfs/vfs.go:512 +0xe0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000370008, 0xffffff9c, 0x400000e090, 0x400007ed80, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x1f0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000370008, 0x1?, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0xac gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x880 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x60 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xa8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000370008) pkg/sentry/kernel/task_syscall.go:258 +0x45c gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000370008?, 0xc000370008) pkg/sentry/kernel/task_run.go:269 +0x1814 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000370008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x160 ====== kernel.taskSetRWMutex -> kernel.fsContextMutex ===== goroutine 129 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc0005cafc8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).checkAndPreventSharingOutsideTG(0xc0005cafc0, 0xc00020d808) pkg/sentry/kernel/fs_context.go:207 +0xf0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExecveAfterExecveCredsLock).execute(0xc0006143c0, 0xc000ac7908) pkg/sentry/kernel/task_exec.go:156 +0x298 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000ac7908, 0xf) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 149 pkg/sentry/kernel/task_start.go:416 +0x160 final repro crashed as (corrupted=false): panic: WARNING: circular locking detected: kernel.fsContextMutex -> kernfs.filesystemRWMutex: goroutine 592 [running]: gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc000122260, 0xc0011d38a0) bazel-out/aarch64-fastbuild/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:440 +0x29c gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc000213050, 0xc000122240, {0x0, 0x0, 0x0}) pkg/sync/locking/lockdep.go:112 +0x3a0 gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc000213050, 0xffffffffffffffff) pkg/sync/locking/lockdep.go:144 +0x2fc gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*filesystemRWMutex).Lock(0xc001277790) bazel-out/aarch64-fastbuild/bin/pkg/sentry/fsimpl/kernfs/filesystem_mutex.go:31 +0x50 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Dentry).DecRef(0xc0015d8630, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/fsimpl/kernfs/kernfs.go:303 +0xe8 gvisor.dev/gvisor/pkg/sentry/vfs.(*Dentry).DecRef(0xc0015d8630, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/vfs/dentry.go:156 +0x6c gvisor.dev/gvisor/pkg/sentry/vfs.VirtualDentry.DecRef({0xc0001aab00?, 0xc0015d8630?}, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/vfs/vfs.go:1114 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).destroy(0xc000d60a80, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/kernel/fs_context.go:73 +0x120 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef.func1() pkg/sentry/kernel/fs_context.go:87 +0x58 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContextRefs).DecRef(0xc000d60a80, 0xc0011d3cf8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_refs.go:133 +0xa0 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).DecRef(0xc000d60a80, {0x1d61bb8, 0xc0007dcc88}) pkg/sentry/kernel/fs_context.go:86 +0x90 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExitMain).execute(0xc0007dcc88?, 0xc0007dcc88) pkg/sentry/kernel/task_exit.go:301 +0x5cc gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0007dcc88, 0x48) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 561 pkg/sentry/kernel/task_start.go:416 +0x160 known lock chain: kernfs.filesystemRWMutex -> kernel.taskSetRWMutex -> kernel.fsContextMutex ====== kernfs.filesystemRWMutex -> kernel.taskSetRWMutex ===== goroutine 133 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*taskSetRWMutex).RLock(0xc0005be000) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/taskset_mutex.go:59 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IDOfThreadGroup(0xc0001b02a0, 0xc000464c08) pkg/sentry/kernel/threads.go:328 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Readlink(0xc000200150, {0x1d61bb8, 0xc000370008}, 0xb51c0c?) pkg/sentry/fsimpl/proc/tasks_files.go:62 +0xa4 gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*selfSymlink).Getlink(0xc000200150, {0x1d61bb8, 0xc000370008}, 0xc000838420) pkg/sentry/fsimpl/proc/tasks_files.go:70 +0x54 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).stepExistingLocked(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88, 0xc000a5d050) pkg/sentry/fsimpl/kernfs/filesystem.go:83 +0x49c gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).walkExistingLocked(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88) pkg/sentry/fsimpl/kernfs/filesystem.go:197 +0xe8 gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).ReadlinkAt(0xc0001a4480, {0x1d61bb8, 0xc000370008}, 0xc0003e0d88) pkg/sentry/fsimpl/kernfs/filesystem.go:696 +0xd4 gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).ReadlinkAt(0xc0001ec600, {0x1d61bb8, 0xc000370008}, 0xc0000f63c0, 0xc0000475a0) pkg/sentry/vfs/vfs.go:512 +0xe0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.readlinkat(0xc000370008, 0xffffff9c, 0x400000e090, 0x400007ed80, 0x80) pkg/sentry/syscalls/linux/sys_file.go:1096 +0x1f0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Readlinkat(0xc000370008, 0x1?, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_file.go:1067 +0xac gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x880 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x60 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000370008, 0x4e, {{0xffffffffffffff9c}, {0x400000e090}, {0x400007ed80}, {0x80}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xa8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000370008) pkg/sentry/kernel/task_syscall.go:258 +0x45c gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000370008?, 0xc000370008) pkg/sentry/kernel/task_run.go:269 +0x1814 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000370008, 0x1) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1 pkg/sentry/kernel/task_start.go:416 +0x160 ====== kernel.taskSetRWMutex -> kernel.fsContextMutex ===== goroutine 129 [running]: gvisor.dev/gvisor/pkg/sentry/kernel.(*fsContextMutex).Lock(0xc0005cafc8) bazel-out/aarch64-fastbuild/bin/pkg/sentry/kernel/fs_context_mutex.go:33 +0x50 gvisor.dev/gvisor/pkg/sentry/kernel.(*FSContext).checkAndPreventSharingOutsideTG(0xc0005cafc0, 0xc00020d808) pkg/sentry/kernel/fs_context.go:207 +0xf0 gvisor.dev/gvisor/pkg/sentry/kernel.(*runExecveAfterExecveCredsLock).execute(0xc0006143c0, 0xc000ac7908) pkg/sentry/kernel/task_exec.go:156 +0x298 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000ac7908, 0xf) pkg/sentry/kernel/task_run.go:97 +0x2f8 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 149 pkg/sentry/kernel/task_start.go:416 +0x160