syzbot


panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:

Status: auto-obsoleted due to no activity on 2022/09/12 22:06
Reported-by: syzbot+8f0296933d084e4038bb@syzkaller.appspotmail.com
First crash: 688d, last: 681d

Sample crash report:
panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:
goroutine 1852102 [running]:
gvisor.dev/gvisor/pkg/log.Stacks(0xe0)
	pkg/log/log.go:316 +0x8d
gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc0001c3780, 0xc0001c3d00, {0xc0061ac7d0, 0x1, 0x1})
	pkg/sync/locking/lockdep.go:56 +0x1f4
gvisor.dev/gvisor/pkg/sync/locking.checkLock.func1(0xc00002ada0, 0xc000d5c998)
	pkg/sync/locking/lockdep.go:76 +0x65
gvisor.dev/gvisor/pkg/sync/locking.(*ancestorsAtomicPtrMap).RangeRepeatable(0xc00002ad80, 0xc000d5cab0)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sync/locking/atomicptrmap_ancestors_unsafe.go:441 +0x226
gvisor.dev/gvisor/pkg/sync/locking.checkLock(0xc0001c3780, 0xc00002ad80, {0x0, 0x0, 0x0})
	pkg/sync/locking/lockdep.go:73 +0x46c
gvisor.dev/gvisor/pkg/sync/locking.AddGLock(0xc0001c3780, 0x0)
	pkg/sync/locking/lockdep.go:107 +0x3ba
gvisor.dev/gvisor/pkg/sentry/mm.(*mappingRWMutex).RLock(0xc005c8e064)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/sentry/mm/mapping_mutex.go:46 +0x3f
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc005c8e000, {0x1b84f10, 0xc000bbd500}, {0xc0061ac7c0, 0x1c42c6}, {0x8, 0x0, 0x49}, 0x60, 0xc000d5ceb8)
	pkg/sentry/mm/io.go:530 +0xf8
gvisor.dev/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc005c8e000, {0x1b84f10, 0xc000bbd500}, 0x0, {0xc00634f280, 0xc000d5cfc7, 0x80}, {0xc7, 0xcf})
	pkg/sentry/mm/io.go:120 +0x26c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).CopyOutBytes(0xc000bbd500, 0x4492b9, {0xc00634f280, 0x80, 0x80})
	pkg/sentry/kernel/task_usermem.go:64 +0x96
gvisor.dev/gvisor/pkg/abi/linux.(*SignalInfo).CopyOutN(0xc00634f280, {0x1b56de8, 0xc000bbd500}, 0x470e65, 0x80)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/abi/linux/linux_abi_autogen_unsafe.go:13132 +0xd4
gvisor.dev/gvisor/pkg/abi/linux.(*SignalInfo).CopyOut(...)
	bazel-out/k8-fastbuild-ST-a4501ad48192/bin/pkg/abi/linux/linux_abi_autogen_unsafe.go:13141
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Ptrace(0xc000bbd500, 0x4202, 0x470e37, 0x0, 0x0)
	pkg/sentry/kernel/ptrace.go:1227 +0xcb5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Ptrace(0xc000bbd500, {{0x4202}, {0x4ac4}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_thread.go:734 +0x45
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000bbd500, 0x65, {{0x4202}, {0x4ac4}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9d8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000bbd500, 0x46f779, {{0x4202}, {0x4ac4}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x6a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc005b0ef00, 0x46fc2c, {{0x4202}, {0x4ac4}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000bbd500)
	pkg/sentry/kernel/task_syscall.go:257 +0x3e7
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000bbd500, 0xc000bbd500)
	pkg/sentry/kernel/task_run.go:253 +0x16b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000bbd500, 0x2d6e)
	pkg/sentry/kernel/task_run.go:94 +0x35b
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:370 +0x1a9

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/06/14 22:06 gvisor ebadfe7702fe 127d1faf .config console log report info ci-gvisor-ptrace-2-race panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:
2022/06/09 23:27 gvisor 38b6e9ec938b 0d5abf15 .config console log report info ci-gvisor-ptrace-2-race panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:
2022/06/09 07:44 gvisor c3a7b477f9f0 0d5abf15 .config console log report info ci-gvisor-ptrace-2-race panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:
2022/06/08 19:32 gvisor 8b5289e723b5 0d5abf15 .config console log report info ci-gvisor-ptrace-3-race panic: WARNING: circular locking detected: kernel.taskSetRWMutex -> mm.mappingRWMutex:
* Struck through repros no longer work on HEAD.