syzbot

panic: WARNING: circular locking detected: mm.mappingRWMutex -> tmpfs.filesystemRWMutex:
goroutine 186 [running]:
gvisor.dev/gvisor/pkg/log.Stacks(0x80)
	pkg/log/log.go:316 +0xd3
gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc0001bdd00, 0xc0001bdd80, {0xc0009de5a0, 0x1, 0x1})
	pkg/sync/locking/lockdep.go:56 +0x225
gvisor.dev/gvisor/pkg/sync/locking.checkLock.func1(0xc0001bd7a0, 0xc0005fe668)
	pkg/sync/locking/lockdep.go:76 +0x7a
gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc0001bd780, 0xc0005fe780)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:441 +0x334
gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc0001bdd00, 0xc0001bd780, {0x0, 0x0, 0x0})
	pkg/sync/locking/lockdep.go:73 +0x4aa
gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc0001bdd00, 0x0)
	pkg/sync/locking/lockdep.go:107 +0x33e
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystemRWMutex).RLock(0xc0003fe070)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sentry/fsimpl/tmpfs/filesystem_mutex.go:46 +0x53
gvisor.dev/gvisor/pkg/sentry/fsimpl/tmpfs.(*filesystem).PrependPath(0xc0003fe000, {0xc000a1c07b, 0x1}, {0xc000616960, 0xc00057db00}, {0xc0001681e0, 0xc0005a0aa0}, 0x46fc2c)
	pkg/sentry/fsimpl/tmpfs/filesystem.go:896 +0xc5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).PathnameWithDeleted(0x1c12a30, {0x1c12a30, 0xc000743500}, {0xc000616960, 0xc00057db00}, {0xc0001681e0, 0xc0005a0aa0})
	pkg/sentry/vfs/pathname.go:57 +0x323
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).MappedName(0xc000648280, {0x1c12a30, 0xc000743500})
	pkg/sentry/vfs/file_description.go:791 +0xe5
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).appendVMAMapsEntryLocked(0xc0005188e0, {0x1c12a30, 0xc000743500}, {0xc00065c000, 0xc0005feea8}, 0x1)
	pkg/sentry/mm/procfs.go:165 +0x54d
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).vmaSmapsEntryIntoLocked(0xc0009bb000, {0x1c12a30, 0xc000743500}, {0xc00065c000, 0x470e65}, 0xddab45)
	pkg/sentry/mm/procfs.go:236 +0xb1
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).ReadSmapsDataInto(0xc0009bb000, {0x1c12a30, 0xc000743500}, 0x270806c)
	pkg/sentry/mm/procfs.go:185 +0x146
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*smapsData).Generate(0xc000b48000, {0x1c12a30, 0xc000743500}, 0x470e65)
	pkg/sentry/fsimpl/proc/task_files.go:564 +0x9f
gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).preadLocked(0xc0005188c0, {0x1c12a30, 0xc000743500}, {{0x1c06208, 0xc0009bb000}, {0x0, 0x1, 0x0, 0x0}, {0x0, ...}}, ...)
	pkg/sentry/vfs/file_description_impl_util.go:301 +0x1a2
gvisor.dev/gvisor/pkg/sentry/vfs.(*DynamicBytesFileDescriptionImpl).Read(0xc0005188c0, {0x1c12a30, 0xc000743500}, {{0x1c06208, 0xc0009bb000}, {0x0, 0x1, 0x0, 0x0}, {0x0, ...}}, ...)
	pkg/sentry/vfs/file_description_impl_util.go:328 +0x13a
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*DynamicBytesFD).Read(0xc0005188c0, {0x1c12a30, 0xc000743500}, {{0x1c06208, 0xc0009bb000}, {0x0, 0x1, 0x0, 0x0}, {0x0, ...}}, ...)
	pkg/sentry/fsimpl/kernfs/dynamic_bytes_file.go:115 +0xac
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Read(0xc000518920, {0x1c12a30, 0xc000743500}, {{0x1c06208, 0xc0009bb000}, {0x0, 0x1, 0x0, 0x0}, {0x0, ...}}, ...)
	pkg/sentry/vfs/file_description.go:634 +0x16b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.read(0x0, 0x129e6a0, {{0x1c06208, 0xc0009bb000}, {0x0, 0x1, 0x0, 0x0}, {0x0, 0x1}}, ...)
	pkg/sentry/syscalls/linux/vfs2/read_write.go:94 +0xae
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Read(0xc000743500, {{0x4}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/vfs2/read_write.go:63 +0x36f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000743500, 0x0, {{0x4}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0xaf7
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000743500, 0x1, {{0x4}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x8e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0009322d0, 0x1, {{0x4}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0xc5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000743500)
	pkg/sentry/kernel/task_syscall.go:257 +0x4c7
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000743500, 0xc000743500)
	pkg/sentry/kernel/task_run.go:253 +0x19fc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000743500, 0x18)
	pkg/sentry/kernel/task_run.go:94 +0x2d4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:370 +0x1d1