[ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.132' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 32.604560] REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal [ 32.613219] REISERFS (device loop0): using ordered data mode [ 32.619301] reiserfs: using flush barriers [ 32.624510] REISERFS (device loop0): journal params: device loop0, size 15748, journal first block 18, max trans len 1024, max batch 900, max commit age 0, max trans age 30 [ 32.645881] REISERFS (device loop0): checking transaction log (loop0) [ 32.653886] REISERFS (device loop0): Using r5 hash to sort names [ 32.668277] reiserfs: enabling write barrier flush mode [ 32.676926] REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount. [ 32.695486] [ 32.697121] ====================================================== [ 32.703419] WARNING: possible circular locking dependency detected [ 32.709712] 4.19.211-syzkaller #0 Not tainted [ 32.714177] ------------------------------------------------------ [ 32.720483] syz-executor266/8102 is trying to acquire lock: [ 32.726179] 00000000c05e6d99 (&journal->j_mutex){+.+.}, at: do_journal_begin_r+0x298/0x10b0 [ 32.734665] [ 32.734665] but task is already holding lock: [ 32.740616] 0000000034ca88b5 (sb_writers#11){.+.+}, at: mnt_want_write_file+0x63/0x1d0 [ 32.748688] [ 32.748688] which lock already depends on the new lock. [ 32.748688] [ 32.756981] [ 32.756981] the existing dependency chain (in reverse order) is: [ 32.764576] [ 32.764576] -> #2 (sb_writers#11){.+.+}: [ 32.770105] mnt_want_write_file+0x63/0x1d0 [ 32.774924] reiserfs_ioctl+0x1a7/0x9a0 [ 32.779396] do_vfs_ioctl+0xcdb/0x12e0 [ 32.783781] ksys_ioctl+0x9b/0xc0 [ 32.787735] __x64_sys_ioctl+0x6f/0xb0 [ 32.792117] do_syscall_64+0xf9/0x620 [ 32.796418] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.802112] [ 32.802112] -> #1 (&sbi->lock){+.+.}: [ 32.807395] reiserfs_write_lock_nested+0x65/0xe0 [ 32.812737] do_journal_begin_r+0x2a2/0x10b0 [ 32.817654] journal_begin+0x162/0x400 [ 32.822040] reiserfs_remount+0x790/0x1540 [ 32.827707] do_remount_sb+0x1a0/0x6a0 [ 32.832092] do_mount+0x1a62/0x2f50 [ 32.836213] ksys_mount+0xcf/0x130 [ 32.840260] __x64_sys_mount+0xba/0x150 [ 32.844734] do_syscall_64+0xf9/0x620 [ 32.849033] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.854719] [ 32.854719] -> #0 (&journal->j_mutex){+.+.}: [ 32.860586] __mutex_lock+0xd7/0x1190 [ 32.864882] do_journal_begin_r+0x298/0x10b0 [ 32.869797] journal_begin+0x162/0x400 [ 32.874181] reiserfs_dirty_inode+0xff/0x250 [ 32.879085] __mark_inode_dirty+0x16b/0x1140 [ 32.883989] reiserfs_ioctl+0x7dc/0x9a0 [ 32.888460] do_vfs_ioctl+0xcdb/0x12e0 [ 32.892856] ksys_ioctl+0x9b/0xc0 [ 32.896812] __x64_sys_ioctl+0x6f/0xb0 [ 32.901286] do_syscall_64+0xf9/0x620 [ 32.905585] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 32.911269] [ 32.911269] other info that might help us debug this: [ 32.911269] [ 32.919386] Chain exists of: [ 32.919386] &journal->j_mutex --> &sbi->lock --> sb_writers#11 [ 32.919386] [ 32.929866] Possible unsafe locking scenario: [ 32.929866] [ 32.935898] CPU0 CPU1 [ 32.940546] ---- ---- [ 32.945182] lock(sb_writers#11); [ 32.948695] lock(&sbi->lock); [ 32.954462] lock(sb_writers#11); [ 32.960490] lock(&journal->j_mutex); [ 32.964352] [ 32.964352] *** DEADLOCK *** [ 32.964352] [ 32.970388] 1 lock held by syz-executor266/8102: [ 32.975115] #0: 0000000034ca88b5 (sb_writers#11){.+.+}, at: mnt_want_write_file+0x63/0x1d0 [ 32.983602] [ 32.983602] stack backtrace: [ 32.988081] CPU: 0 PID: 8102 Comm: syz-executor266 Not tainted 4.19.211-syzkaller #0 [ 32.995934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 [ 33.005259] Call Trace: [ 33.007827] dump_stack+0x1fc/0x2ef [ 33.011434] print_circular_bug.constprop.0.cold+0x2d7/0x41e [ 33.017210] __lock_acquire+0x30c9/0x3ff0 [ 33.021335] ? mark_held_locks+0xf0/0xf0 [ 33.025378] ? mark_held_locks+0xf0/0xf0 [ 33.029417] ? __read_once_size_nocheck.constprop.0+0x10/0x10 [ 33.035277] lock_acquire+0x170/0x3c0 [ 33.039058] ? do_journal_begin_r+0x298/0x10b0 [ 33.043630] ? do_journal_begin_r+0x298/0x10b0 [ 33.048197] __mutex_lock+0xd7/0x1190 [ 33.051985] ? do_journal_begin_r+0x298/0x10b0 [ 33.056545] ? lock_downgrade+0x720/0x720 [ 33.060670] ? do_journal_begin_r+0x298/0x10b0 [ 33.065229] ? mutex_trylock+0x1a0/0x1a0 [ 33.069268] ? __mutex_unlock_slowpath+0xea/0x610 [ 33.074090] ? wait_for_completion_io+0x10/0x10 [ 33.078734] do_journal_begin_r+0x298/0x10b0 [ 33.083130] ? do_journal_end+0x4840/0x4840 [ 33.088732] ? mark_held_locks+0xf0/0xf0 [ 33.092770] ? current_time+0x6f/0x1c0 [ 33.096644] journal_begin+0x162/0x400 [ 33.100507] reiserfs_dirty_inode+0xff/0x250 [ 33.104894] ? reiserfs_unfreeze+0xa0/0xa0 [ 33.109108] ? check_preemption_disabled+0x41/0x280 [ 33.114101] ? reiserfs_unfreeze+0xa0/0xa0 [ 33.118324] __mark_inode_dirty+0x16b/0x1140 [ 33.122712] reiserfs_ioctl+0x7dc/0x9a0 [ 33.126665] ? reiserfs_unpack+0x5c0/0x5c0 [ 33.130878] do_vfs_ioctl+0xcdb/0x12e0 [ 33.134743] ? do_mount+0x163/0x2f50 [ 33.138432] ? ioctl_preallocate+0x200/0x200 [ 33.142816] ? copy_mount_string+0x40/0x40 [ 33.147040] ? check_preemption_disabled+0x41/0x280 [ 33.152055] ? ksys_mount+0xf4/0x130 [ 33.155756] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 33.160756] ksys_ioctl+0x9b/0xc0 [ 33.164187] __x64_sys_ioctl+0x6f/0xb0 [ 33.168054] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 33.172617] do_syscall_64+0xf9/0x620 [ 33.176408] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.181576] RIP: 0033:0x7fe7d32368c9 [ 33.185270] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 executing program [ 33.204171] RSP: 002b:00007fffd177d4a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 33.211855] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe7d32368c9 [ 33.219098] RDX: 0000000020000080 RSI: 0000000040087602 RDI: 0000000000000005 [ 33.226356] RBP: 0000000000000000 R08: 00007fe7d32a3ec0 R09: 00007fe7d32a3ec0 [ 33.233605] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffd177d4d0 [ 33.240853] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000 executing program executing program executing program [ 33.264252] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program