syzbot


possible deadlock in path_openat

Status: upstream: reported C repro on 2019/06/15 07:08
Reported-by: syzbot+3e0f3da7c22a27616691@syzkaller.appspotmail.com
First crash: 1197d, last: 1d06h
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in path_openat C done unreliable 349 905d 1459d 0/24 auto-obsoleted due to no activity on 2022/09/16 21:43
android-49 possible deadlock in path_openat 5 1034d 1049d 0/3 auto-closed as invalid on 2020/03/24 08:43
linux-4.14 possible deadlock in path_openat C error 323 196d 1249d 0/1 upstream: reported C repro on 2019/04/24 01:40

Sample crash report:
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
======================================================
WARNING: possible circular locking dependency detected
4.19.152-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor865/16874 is trying to acquire lock:
0000000005a560bc (&ovl_i_mutex_dir_key[depth]){++++}, at: inode_lock_shared include/linux/fs.h:758 [inline]
0000000005a560bc (&ovl_i_mutex_dir_key[depth]){++++}, at: do_last fs/namei.c:3326 [inline]
0000000005a560bc (&ovl_i_mutex_dir_key[depth]){++++}, at: path_openat+0x1863/0x2e90 fs/namei.c:3537

but task is already holding lock:
000000006a629202 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1406 [inline]
000000006a629202 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x3c1/0x23c0 fs/exec.c:1749

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&sig->cred_guard_mutex){+.+.}:
overlayfs: filesystem on './file1' not supported as upperdir
       do_io_accounting fs/proc/base.c:2738 [inline]
       proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2781
       proc_single_show+0xeb/0x170 fs/proc/base.c:755
overlayfs: filesystem on './file1' not supported as upperdir
       seq_read+0x4bc/0x10c0 fs/seq_file.c:229
       do_loop_readv_writev fs/read_write.c:701 [inline]
       do_loop_readv_writev fs/read_write.c:688 [inline]
       do_iter_read+0x471/0x630 fs/read_write.c:925
overlayfs: filesystem on './file1' not supported as upperdir
       vfs_readv+0xe5/0x150 fs/read_write.c:987
       do_preadv fs/read_write.c:1071 [inline]
       __do_sys_preadv fs/read_write.c:1121 [inline]
       __se_sys_preadv fs/read_write.c:1116 [inline]
       __x64_sys_preadv+0x22b/0x310 fs/read_write.c:1116
       do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe
overlayfs: filesystem on './file1' not supported as upperdir

-> #2 (&p->lock){+.+.}:
       seq_read+0x6b/0x10c0 fs/seq_file.c:161
       proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231
       do_loop_readv_writev fs/read_write.c:701 [inline]
       do_loop_readv_writev fs/read_write.c:688 [inline]
       do_iter_read+0x471/0x630 fs/read_write.c:925
       vfs_readv+0xe5/0x150 fs/read_write.c:987
       kernel_readv fs/splice.c:362 [inline]
       default_file_splice_read+0x457/0xa10 fs/splice.c:417
       do_splice_to+0x10e/0x160 fs/splice.c:881
       splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959
       do_splice_direct+0x1a7/0x270 fs/splice.c:1068
       do_sendfile+0x550/0xc30 fs/read_write.c:1447
       __do_sys_sendfile64 fs/read_write.c:1508 [inline]
       __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494
       do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #1 (sb_writers#3){.+.+}:
       sb_start_write include/linux/fs.h:1579 [inline]
       mnt_want_write+0x3a/0xb0 fs/namespace.c:360
       ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:600
       lookup_open+0x86c/0x19c0 fs/namei.c:3235
       do_last fs/namei.c:3327 [inline]
       path_openat+0x10d6/0x2e90 fs/namei.c:3537
       do_filp_open+0x18c/0x3f0 fs/namei.c:3567
       do_sys_open+0x3b3/0x520 fs/open.c:1085
       do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&ovl_i_mutex_dir_key[depth]){++++}:
       down_read+0x36/0x80 kernel/locking/rwsem.c:24
       inode_lock_shared include/linux/fs.h:758 [inline]
       do_last fs/namei.c:3326 [inline]
       path_openat+0x1863/0x2e90 fs/namei.c:3537
       do_filp_open+0x18c/0x3f0 fs/namei.c:3567
       do_open_execat+0x11d/0x5b0 fs/exec.c:853
       __do_execve_file+0x1ad4/0x23c0 fs/exec.c:1757
       do_execveat_common fs/exec.c:1866 [inline]
       do_execveat+0x3d/0x50 fs/exec.c:1894
       __do_sys_execveat fs/exec.c:1975 [inline]
       __se_sys_execveat fs/exec.c:1967 [inline]
       __x64_sys_execveat+0xe1/0x120 fs/exec.c:1967
       do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

Chain exists of:
  &ovl_i_mutex_dir_key[depth] --> &p->lock --> &sig->cred_guard_mutex

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sig->cred_guard_mutex);
                               lock(&p->lock);
                               lock(&sig->cred_guard_mutex);
  lock(&ovl_i_mutex_dir_key[depth]);

 *** DEADLOCK ***

1 lock held by syz-executor865/16874:
 #0: 000000006a629202 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1406 [inline]
 #0: 000000006a629202 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x3c1/0x23c0 fs/exec.c:1749

stack backtrace:
CPU: 1 PID: 16874 Comm: syz-executor865 Not tainted 4.19.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1221
 check_prev_add kernel/locking/lockdep.c:1865 [inline]
 check_prevs_add kernel/locking/lockdep.c:1978 [inline]
 validate_chain kernel/locking/lockdep.c:2419 [inline]
 __lock_acquire+0x37ad/0x3ff0 kernel/locking/lockdep.c:3415
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3907
 down_read+0x36/0x80 kernel/locking/rwsem.c:24
 inode_lock_shared include/linux/fs.h:758 [inline]
 do_last fs/namei.c:3326 [inline]
 path_openat+0x1863/0x2e90 fs/namei.c:3537
 do_filp_open+0x18c/0x3f0 fs/namei.c:3567
 do_open_execat+0x11d/0x5b0 fs/exec.c:853
 __do_execve_file+0x1ad4/0x23c0 fs/exec.c:1757
 do_execveat_common fs/exec.c:1866 [inline]
 do_execveat+0x3d/0x50 fs/exec.c:1894
 __do_sys_execveat fs/exec.c:1975 [inline]
 __se_sys_execveat fs/exec.c:1967 [inline]
 __x64_sys_execveat+0xe1/0x120 fs/exec.c:1967
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44af99
Code: e8 1c e6 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 03 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f40cfbc8d18 EFLAGS: 00000246 ORIG_RAX: 0000000000000142
RAX: ffffffffffffffda RBX: 00000000006e1c58 RCX: 000000000044af99
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 00000000ffffff9c
RBP: 00000000006e1c50 R08: 0000000000001000 R09: 68742f636f72702f
R10: 0000000020000700 R11: 0000000000000246 R12: 00000000006e1c5c
R13: 00007f40cfbc8d20 R14: 00007f40cfbc8d20 R15: 0000000000000006
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: failed to resolve './file1': -2
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: failed to resolve './file1': -2
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir
overlayfs: filesystem on './file1' not supported as upperdir

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2020/12/09 22:29 linux-4.19.y 4abf26854aad ff4a3345 .config log report syz C
* Struck through repros no longer work on HEAD.
Crashes (839):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2020/10/21 06:39 linux-4.19.y ad326970d25c ff4a3345 .config log report syz C
ci2-linux-4-19 2022/03/12 08:11 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config log report syz possible deadlock in path_openat
ci2-linux-4-19 2022/09/23 10:02 linux-4.19.y 3f8a27f9e27b 0042f2b4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/22 21:34 linux-4.19.y 3f8a27f9e27b 0042f2b4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/22 08:23 linux-4.19.y 3f8a27f9e27b 60af5050 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/16 22:21 linux-4.19.y 3f8a27f9e27b dd9a85ff .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/16 14:08 linux-4.19.y 3f8a27f9e27b dd9a85ff .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/15 16:45 linux-4.19.y 3f8a27f9e27b dd9a85ff .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/14 02:37 linux-4.19.y 3f8a27f9e27b b884348d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/12 12:37 linux-4.19.y 3f8a27f9e27b 356d8217 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/11 12:26 linux-4.19.y 3f8a27f9e27b 356d8217 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/08 21:43 linux-4.19.y 3f8a27f9e27b f3027468 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/08 15:22 linux-4.19.y 3f8a27f9e27b f3027468 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/09/01 22:10 linux-4.19.y 3f8a27f9e27b 86c46e46 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/23 23:19 linux-4.19.y 3f8a27f9e27b cea8b0f7 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/21 18:41 linux-4.19.y 3f8a27f9e27b 26a13b38 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/15 11:41 linux-4.19.y 3f8a27f9e27b 8dfcaa3d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/15 07:49 linux-4.19.y 3f8a27f9e27b 8dfcaa3d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/13 22:15 linux-4.19.y 3f8a27f9e27b 8dfcaa3d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/11 18:45 linux-4.19.y 3f8a27f9e27b 787ed7e0 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/09 09:10 linux-4.19.y 3f8a27f9e27b da700653 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/07 13:46 linux-4.19.y 3f8a27f9e27b 88e3a122 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/07 09:50 linux-4.19.y 3f8a27f9e27b 88e3a122 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/05 15:25 linux-4.19.y 3f8a27f9e27b a65a7ce9 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/04 22:04 linux-4.19.y 3f8a27f9e27b 1c9013ac .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/03 15:28 linux-4.19.y 3f8a27f9e27b 1c9013ac .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/01 23:41 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/01 04:13 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/08/01 02:52 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/31 10:05 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 23:57 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 15:38 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 07:35 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 06:09 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 03:26 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/30 00:05 linux-4.19.y 3f8a27f9e27b fef302b1 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/29 09:35 linux-4.19.y 3f8a27f9e27b fb95c74d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/29 01:54 linux-4.19.y 3f8a27f9e27b fb95c74d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/28 18:00 linux-4.19.y 3f8a27f9e27b fb95c74d .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/27 17:33 linux-4.19.y 3f8a27f9e27b da9d0366 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/27 14:46 linux-4.19.y 3f8a27f9e27b da9d0366 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/27 06:11 linux-4.19.y 3f8a27f9e27b ae971e66 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/26 14:30 linux-4.19.y 3f8a27f9e27b 279b89c2 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/25 03:04 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/24 23:07 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/24 20:42 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/24 08:58 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/24 07:10 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/23 16:57 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/23 11:09 linux-4.19.y 3f8a27f9e27b 22343af4 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/20 23:34 linux-4.19.y 3f8a27f9e27b 88cb1383 .config log report info possible deadlock in path_openat
ci2-linux-4-19 2022/07/20 12:00 linux-4.19.y 3f8a27f9e27b 775344bc .config log report info possible deadlock in path_openat
ci2-linux-4-19 2021/01/16 05:26 linux-4.19.y 675cc038067f 65a7a854 .config log report info
ci2-linux-4-19 2019/06/15 06:07 linux-4.19.y 768292d05361 442206d7 .config log report
* Struck through repros no longer work on HEAD.