syzbot

 sign-in | mailing list | source | docs
🞠Open [712]
🞠Fixed [297]
🞠Invalid [838]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

possible deadlock in proc_tid_io_accounting

Status: auto-obsoleted due to no activity on 2023/03/30 08:11
Reported-by: syzbot+93b87d5eaf895c3ed1e4@syzkaller.appspotmail.com
First crash: 1524d, last: 724d
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 possible deadlock in proc_tid_io_accounting (2) 1 910d 910d 0/1 auto-obsoleted due to no activity on 2022/09/24 23:12
upstream possible deadlock in proc_tid_io_accounting fs 1 1857d 1853d 0/28 auto-closed as invalid on 2020/02/21 09:02
linux-4.14 possible deadlock in proc_tid_io_accounting 3 1331d 1411d 0/1 auto-closed as invalid on 2021/07/31 05:58

Sample crash report:
erofs: unmounted for /dev/loop5
======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/5523 is trying to acquire lock:
00000000dec0b943 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline]
00000000dec0b943 (&sig->cred_guard_mutex){+.+.}, at: proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793

but task is already holding lock:
00000000c95a987f (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&p->lock){+.+.}:
       seq_read+0x6b/0x11c0 fs/seq_file.c:164
       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+0x457/0xa00 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+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #2 (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:602
       lookup_open+0x893/0x1a20 fs/namei.c:3235
       do_last fs/namei.c:3327 [inline]
       path_openat+0x1094/0x2df0 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+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #1 (&ovl_i_mutex_dir_key[depth]){++++}:
       inode_lock_shared include/linux/fs.h:758 [inline]
       do_last fs/namei.c:3326 [inline]
       path_openat+0x17ec/0x2df0 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+0x1a8b/0x2360 fs/exec.c:1770
       do_execveat_common fs/exec.c:1879 [inline]
       do_execve+0x35/0x50 fs/exec.c:1896
       __do_sys_execve fs/exec.c:1977 [inline]
       __se_sys_execve fs/exec.c:1972 [inline]
       __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972
       do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

-> #0 (&sig->cred_guard_mutex){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:937 [inline]
       __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
       do_io_accounting fs/proc/base.c:2750 [inline]
       proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793
       proc_single_show+0xeb/0x170 fs/proc/base.c:755
       seq_read+0x4e0/0x11c0 fs/seq_file.c:232
       __vfs_read+0xf7/0x750 fs/read_write.c:416
       vfs_read+0x194/0x3c0 fs/read_write.c:452
       ksys_read+0x12b/0x2a0 fs/read_write.c:579
       do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
       entry_SYSCALL_64_after_hwframe+0x49/0xbe

other info that might help us debug this:

Chain exists of:
  &sig->cred_guard_mutex --> sb_writers#3 --> &p->lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&p->lock);
                               lock(sb_writers#3);
                               lock(&p->lock);
  lock(&sig->cred_guard_mutex);

 *** DEADLOCK ***

2 locks held by syz-executor.3/5523:
 #0: 0000000040baad0a (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
 #1: 00000000c95a987f (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164

stack backtrace:
CPU: 0 PID: 5523 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222
 check_prev_add kernel/locking/lockdep.c:1866 [inline]
 check_prevs_add kernel/locking/lockdep.c:1979 [inline]
 validate_chain kernel/locking/lockdep.c:2420 [inline]
 __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416
 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908
 __mutex_lock_common kernel/locking/mutex.c:937 [inline]
 __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
 do_io_accounting fs/proc/base.c:2750 [inline]
 proc_tid_io_accounting+0x184/0x2b0 fs/proc/base.c:2793
 proc_single_show+0xeb/0x170 fs/proc/base.c:755
 seq_read+0x4e0/0x11c0 fs/seq_file.c:232
 __vfs_read+0xf7/0x750 fs/read_write.c:416
 vfs_read+0x194/0x3c0 fs/read_write.c:452
 ksys_read+0x12b/0x2a0 fs/read_write.c:579
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f90cfac70d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f90ce039168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f90cfbe6f80 RCX: 00007f90cfac70d9
RDX: 00000000000000f2 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f90cfb22ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff05bd4a5f R14: 00007f90ce039300 R15: 0000000000022000
BTRFS: device fsid d552757d-9c39-40e3-95f0-16d819589928 devid 1 transid 8 /dev/loop2
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS error (device loop2): unsupported checksum algorithm 2
BTRFS error (device loop2): superblock checksum mismatch
BTRFS error (device loop2): open_ctree failed
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
erofs: unmounted for /dev/loop5
EXT4-fs (sda1): re-mounted. Opts: (null)
erofs: read_super, device -> /dev/loop5
EXT4-fs (sda1): re-mounted. Opts: (null)
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
EXT4-fs (sda1): re-mounted. Opts: (null)
EXT4-fs (sda1): re-mounted. Opts: (null)
audit: type=1800 audit(1669795834.661:278): pid=5752 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name=".pending_reads" dev="sda1" ino=14676 res=0
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,userÏ:åv'fault_injection=0x0000000000
erofs: Unrecognized mount option "userÏ:åv'fault_injection=0x0000000000" or missing value
audit: type=1800 audit(1669795835.361:279): pid=5824 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.1" name=".pending_reads" dev="sda1" ino=14121 res=0
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,userÏ:åv'fault_injection=0x0000000000
erofs: Unrecognized mount option "userÏ:åv'fault_injection=0x0000000000" or missing value
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,userÏ:åv'fault_injection=0x0000000000
erofs: Unrecognized mount option "userÏ:åv'fault_injection=0x0000000000" or missing value
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=ÿ
erofs: Unrecognized mount option "fault_injection=ÿ" or missing value
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
attempt to access beyond end of device
loop4: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop4
erofs: read_super, device -> /dev/loop1
erofs: options -> user_xattr,user_xattr,fault_injection=ÿ
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=ÿ
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: Unrecognized mount option "fault_injection=ÿ" or missing value
erofs: FAULT_INJECTION was not selected
erofs: Unrecognized mount option "fault_injection=ÿ" or missing value
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
attempt to access beyond end of device
loop4: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop4
BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop3
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
BTRFS info (device loop3): using free space tree
BTRFS error (device loop3): cannot mount because of unsupported optional features (800)
attempt to access beyond end of device
loop4: rw=0, want=4294967296, limit=16
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=ÿ
erofs: unmounted for /dev/loop4
BTRFS error (device loop3): open_ctree failed
erofs: Unrecognized mount option "fault_injection=ÿ" or missing value
audit: type=1800 audit(1669795837.611:280): pid=5942 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14122 res=0
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS: device fsid 24c7a497-3402-47dd-bef8-82358f5f30e0 devid 1 transid 8 /dev/loop2
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
BTRFS info (device loop2): enabling inode map caching
attempt to access beyond end of device
BTRFS info (device loop2): force clearing of disk cache
loop4: rw=0, want=4294967296, limit=16
BTRFS info (device loop2): force zlib compression, level 3
audit: type=1804 audit(1669795837.641:281): pid=5942 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3046769310/syzkaller.jBqAiN/680/bus" dev="sda1" ino=14122 res=1
BTRFS info (device loop2): using free space tree
erofs: unmounted for /dev/loop4
BTRFS info (device loop2): has skinny extents
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
attempt to access beyond end of device
BTRFS info (device loop2): clearing free space tree
loop5: rw=0, want=4294967296, limit=16
BTRFS info (device loop2): clearing 1 ro feature flag
BTRFS info (device loop2): clearing 2 ro feature flag
BTRFS info (device loop2): creating free space tree
BTRFS info (device loop2): setting 1 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop1 devid 1 generation 8 scanned by syz-executor.1 (5983)
BTRFS info (device loop2): setting 2 ro feature flag
BTRFS warning (device <unknown>): duplicate device /dev/loop1 devid 1 generation 8 scanned by systemd-udevd (6048)
erofs: unmounted for /dev/loop5
erofs: read_super, device -> /dev/loop5
BTRFS info (device loop3): using free space tree
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: read_super, device -> /dev/loop1
BTRFS error (device loop3): cannot mount because of unsupported optional features (800)
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: FAULT_INJECTION was not selected
erofs: mounted on /dev/loop4 with opts: user_xattr.
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS error (device loop3): open_ctree failed
erofs: unmounted for /dev/loop4
erofs: root inode @ nid 36
erofs: FAULT_INJECTION was not selected
erofs: mounted on /dev/loop5 with opts: user_xattr.
erofs: root inode @ nid 36
erofs: read_super, device -> /dev/loop4
BTRFS info (device loop2): enabling inode map caching
BTRFS info (device loop2): force clearing of disk cache
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS info (device loop2): force zlib compression, level 3
erofs: mounted on /dev/loop1 with opts: user_xattr.
erofs: FAULT_INJECTION was not selected
BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): has skinny extents
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
attempt to access beyond end of device
erofs: unmounted for /dev/loop4
loop5: rw=0, want=4294967296, limit=16
attempt to access beyond end of device
loop1: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
audit: type=1800 audit(1669795838.851:282): pid=6015 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14134 res=0
erofs: unmounted for /dev/loop1
audit: type=1804 audit(1669795838.921:283): pid=6015 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3046769310/syzkaller.jBqAiN/681/bus" dev="sda1" ino=14134 res=1
erofs: read_super, device -> /dev/loop4
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop4 with opts: user_xattr.
BTRFS info (device loop2): clearing free space tree
erofs: read_super, device -> /dev/loop1
BTRFS info (device loop2): clearing 1 ro feature flag
erofs: unmounted for /dev/loop4
BTRFS info (device loop2): clearing 2 ro feature flag
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS info (device loop2): creating free space tree
erofs: read_super, device -> /dev/loop5
BTRFS info (device loop2): setting 1 ro feature flag
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS info (device loop2): setting 2 ro feature flag
erofs: FAULT_INJECTION was not selected
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop1 with opts: user_xattr.
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
attempt to access beyond end of device
loop1: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
erofs: unmounted for /dev/loop1
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
BTRFS info (device loop4): force zlib compression, level 3
erofs: read_super, device -> /dev/loop5
BTRFS info (device loop4): using free space tree
BTRFS info (device loop4): has skinny extents
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (6155)
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (6074)
erofs: read_super, device -> /dev/loop1
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: FAULT_INJECTION was not selected
erofs: mounted on /dev/loop5 with opts: user_xattr.
erofs: root inode @ nid 36
attempt to access beyond end of device
erofs: mounted on /dev/loop1 with opts: user_xattr.
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (6181)
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop3): using free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
attempt to access beyond end of device
BTRFS info (device loop4): clearing 2 ro feature flag
BTRFS info (device loop4): creating free space tree
BTRFS info (device loop4): setting 1 ro feature flag
loop1: rw=0, want=4294967296, limit=16
BTRFS info (device loop4): setting 2 ro feature flag
BTRFS error (device loop3): cannot mount because of unsupported optional features (800)
BTRFS error (device loop3): open_ctree failed
erofs: read_super, device -> /dev/loop5
erofs: unmounted for /dev/loop1
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
BTRFS info (device loop2): enabling inode map caching
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 13 scanned by systemd-udevd (6217)
BTRFS info (device loop2): force clearing of disk cache
erofs: mounted on /dev/loop5 with opts: user_xattr.
BTRFS info (device loop2): force zlib compression, level 3
BTRFS info (device loop2): using free space tree
BTRFS info (device loop2): has skinny extents
audit: type=1800 audit(1669795840.331:284): pid=6132 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14121 res=0
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
attempt to access beyond end of device
audit: type=1804 audit(1669795840.411:285): pid=6132 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3046769310/syzkaller.jBqAiN/682/bus" dev="sda1" ino=14121 res=1
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by syz-executor.4 (6247)
erofs: read_super, device -> /dev/loop1
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
BTRFS warning (device <unknown>): duplicate device /dev/loop4 devid 1 generation 8 scanned by systemd-udevd (6223)
BTRFS info (device loop2): clearing free space tree
erofs: root inode @ nid 36
BTRFS info (device loop2): clearing 1 ro feature flag
BTRFS info (device loop2): clearing 2 ro feature flag
BTRFS info (device loop2): creating free space tree
erofs: mounted on /dev/loop1 with opts: user_xattr.
BTRFS info (device loop2): setting 1 ro feature flag
BTRFS info (device loop2): setting 2 ro feature flag
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: unmounted for /dev/loop1
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
BTRFS info (device loop4): enabling inode map caching
BTRFS info (device loop4): force clearing of disk cache
attempt to access beyond end of device
BTRFS info (device loop4): force zlib compression, level 3
BTRFS info (device loop4): using free space tree
loop5: rw=0, want=4294967296, limit=16
BTRFS info (device loop4): has skinny extents
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (6288)
erofs: unmounted for /dev/loop5
BTRFS info (device loop3): using free space tree
BTRFS error (device loop3): cannot mount because of unsupported optional features (800)
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (6320)
BTRFS warning (device <unknown>): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (6304)
erofs: FAULT_INJECTION was not selected
BTRFS error (device loop3): open_ctree failed
erofs: root inode @ nid 36
erofs: mounted on /dev/loop5 with opts: user_xattr.
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing 1 ro feature flag
BTRFS info (device loop4): clearing 2 ro feature flag
BTRFS info (device loop4): creating free space tree
BTRFS info (device loop4): setting 1 ro feature flag
BTRFS info (device loop4): setting 2 ro feature flag
attempt to access beyond end of device
loop5: rw=0, want=4294967296, limit=16
erofs: unmounted for /dev/loop5
audit: type=1800 audit(1669795841.821:286): pid=6252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14111 res=0
erofs: read_super, device -> /dev/loop5
erofs: options -> user_xattr,user_xattr,fault_injection=0x000000000000000a,noacl,
erofs: FAULT_INJECTION was not selected
erofs: root inode @ nid 36
audit: type=1804 audit(1669795842.011:287): pid=6252 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir3046769310/syzkaller.jBqAiN/683/bus" dev="sda1" ino=14111 res=1

Crashes (43):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/11/30 08:10 linux-4.19.y 3f8a27f9e27b 579a3740 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/10/23 18:52 linux-4.19.y 3f8a27f9e27b 23bf86af .config console log report info [disk image] [vmlinux] ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/09/21 09:22 linux-4.19.y 3f8a27f9e27b c4b8ccfd .config console log report info [disk image] [vmlinux] ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/08/28 20:44 linux-4.19.y 3f8a27f9e27b 07177916 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/08/01 09:28 linux-4.19.y 3f8a27f9e27b fef302b1 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/07/11 07:31 linux-4.19.y 3f8a27f9e27b b5765a15 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/07/08 17:44 linux-4.19.y 3f8a27f9e27b 8442e655 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/07/02 07:58 linux-4.19.y 3f8a27f9e27b 1434eec0 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/06/27 18:37 linux-4.19.y 3f8a27f9e27b a371c43c .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/06/25 08:46 linux-4.19.y 3f8a27f9e27b a371c43c .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/06/16 10:00 linux-4.19.y 3f8a27f9e27b 1719ee24 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/05/22 19:04 linux-4.19.y 3f8a27f9e27b 7268fa62 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/05/16 19:10 linux-4.19.y 3f8a27f9e27b 744a39e2 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/05/10 17:21 linux-4.19.y 3f8a27f9e27b 8b277b8e .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/03/13 11:58 linux-4.19.y 3f8a27f9e27b 9e8eaa75 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/02/25 12:04 linux-4.19.y 3f8a27f9e27b 7c337266 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/02/13 03:43 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/02/12 15:35 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/02/07 11:14 linux-4.19.y 3f8a27f9e27b a7dab638 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/02/07 10:42 linux-4.19.y 3f8a27f9e27b a7dab638 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/01/30 11:10 linux-4.19.y 3f8a27f9e27b 495e00c5 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/01/29 21:56 linux-4.19.y 3f8a27f9e27b 495e00c5 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/01/25 09:14 linux-4.19.y 3f8a27f9e27b 2cbffd88 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/01/09 23:57 linux-4.19.y 3f8a27f9e27b 2ca0d385 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2022/01/05 02:41 linux-4.19.y 3f8a27f9e27b 0a2584dd .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/12/05 17:42 linux-4.19.y 3f8a27f9e27b a617004c .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/11/16 00:09 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/11/07 09:59 linux-4.19.y 3f8a27f9e27b 4c1be0be .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/10/20 02:48 linux-4.19.y 3f8a27f9e27b 466b7db1 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/10/07 13:50 linux-4.19.y 6db10b4d5efd 62ee0987 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/09/28 04:49 linux-4.19.y c2276d585654 78494d16 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/09/02 08:13 linux-4.19.y e23d55af0e1f 7eb7e152 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/08/06 11:27 linux-4.19.y 6ca2f514c578 2f537099 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/07/25 04:01 linux-4.19.y 4938296e03bd 4d1b57d4 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/07/21 03:43 linux-4.19.y 4938296e03bd 1b201b48 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/07/09 20:59 linux-4.19.y 9f84340f012e 8f5a7b8c .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/07/04 13:34 linux-4.19.y 9f84340f012e 55aa55c2 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/04/21 02:35 linux-4.19.y 2965db2e004c c0ced557 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/04/06 09:42 linux-4.19.y 2034d6f0838e 6a81331a .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/02/28 16:41 linux-4.19.y 2d19be4653f5 4c37c133 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2021/02/04 09:49 linux-4.19.y 811218eceeaa 624dad51 .config console log report info ci2-linux-4-19 possible deadlock in proc_tid_io_accounting
2020/10/30 23:09 linux-4.19.y f5d8eef067ac 18e33098 .config console log report info ci2-linux-4-19
2020/09/21 07:35 linux-4.19.y 015e94d0e37b 9564d2e9 .config console log report info ci2-linux-4-19
* Struck through repros no longer work on HEAD.