ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.719/10360 is trying to acquire lock:
ffff888068b0aea8 (&dquot->dq_lock){+.+.}-{4:4}, at: wait_on_dquot fs/quota/dquot.c:357 [inline]
ffff888068b0aea8 (&dquot->dq_lock){+.+.}-{4:4}, at: dqget+0x72a/0xf10 fs/quota/dquot.c:975
but task is already holding lock:
ffff8880534742c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
ffff8880534742c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x96/0x200 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:1028 [inline]
ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]
ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]
ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
ocfs2_evict_inode+0x1539/0x44e0 fs/ocfs2/inode.c:1299
evict+0x61e/0xb10 fs/inode.c:846
ocfs2_dentry_iput+0x24d/0x390 fs/ocfs2/dcache.c:407
__dentry_kill+0x1a2/0x5e0 fs/dcache.c:670
finish_dput+0xc9/0x480 fs/dcache.c:879
__fput+0x691/0xa70 fs/file_table.c:477
task_work_run+0x1d9/0x270 kernel/task_work.c:233
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
__exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x96/0x200 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:1028 [inline]
ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2731
ocfs2_dio_end_io_write fs/ocfs2/aops.c:2305 [inline]
ocfs2_dio_end_io+0x543/0x1210 fs/ocfs2/aops.c:2403
dio_complete+0x25b/0x790 fs/direct-io.c:281
__blockdev_direct_IO+0x2cb0/0x32f0 fs/direct-io.c:1303
ocfs2_direct_IO+0x251/0x2c0 fs/ocfs2/aops.c:2440
generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4253
__generic_file_write_iter+0x11d/0x230 mm/filemap.c:4422
ocfs2_file_write_iter+0x1663/0x1ed0 fs/ocfs2/file.c:2476
iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736
do_splice_from fs/splice.c:936 [inline]
direct_splice_actor+0x101/0x160 fs/splice.c:1159
splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103
do_splice_direct_actor fs/splice.c:1202 [inline]
do_splice_direct+0x195/0x290 fs/splice.c:1228
do_sendfile+0x535/0x7d0 fs/read_write.c:1372
__do_sys_sendfile64 fs/read_write.c:1433 [inline]
__se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
down_write+0x96/0x200 kernel/locking/rwsem.c:1590
ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227
ocfs2_acquire_dquot+0x816/0xb70 fs/ocfs2/quota_global.c:883
dqget+0x7b1/0xf10 fs/quota/dquot.c:980
dquot_get_next_dqblk+0xb2/0x150 fs/quota/dquot.c:2708
quota_getnextquota+0x2dc/0x4e0 fs/quota/quota.c:250
__do_sys_quotactl fs/quota/quota.c:961 [inline]
__se_sys_quotactl+0x2cd/0x9e0 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (&dquot->dq_lock){+.+.}-{4:4}:
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776
wait_on_dquot fs/quota/dquot.c:357 [inline]
dqget+0x72a/0xf10 fs/quota/dquot.c:975
__dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508
ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314
ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677
lookup_open fs/namei.c:4483 [inline]
open_last_lookups fs/namei.c:4583 [inline]
path_openat+0x1395/0x3860 fs/namei.c:4827
do_file_open+0x23e/0x4a0 fs/namei.c:4859
do_sys_openat2+0x113/0x200 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&dquot->dq_lock --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);
lock(&dquot->dq_lock);
*** DEADLOCK ***
3 locks held by syz.4.719/10360:
#0: ffff888061438420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
#1: ffff88806893df40 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#1: ffff88806893df40 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: open_last_lookups fs/namei.c:4580 [inline]
#1: ffff88806893df40 (&type->i_mutex_dir_key#10){++++}-{4:4}, at: path_openat+0xb4c/0x3860 fs/namei.c:4827
#2: ffff8880534742c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline]
#2: ffff8880534742c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16a/0x4940 fs/ocfs2/suballoc.c:857
stack backtrace:
CPU: 0 UID: 0 PID: 10360 Comm: syz.4.719 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
<TASK>
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
check_noncircular+0x12e/0x150 kernel/locking/lockdep.c:2175
check_prev_add kernel/locking/lockdep.c:3165 [inline]
check_prevs_add kernel/locking/lockdep.c:3284 [inline]
validate_chain kernel/locking/lockdep.c:3908 [inline]
__lock_acquire+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
__mutex_lock_common kernel/locking/mutex.c:614 [inline]
__mutex_lock+0x19f/0x1300 kernel/locking/mutex.c:776
wait_on_dquot fs/quota/dquot.c:357 [inline]
dqget+0x72a/0xf10 fs/quota/dquot.c:975
__dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508
ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
ocfs2_mknod+0xa67/0x2290 fs/ocfs2/namei.c:314
ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677
lookup_open fs/namei.c:4483 [inline]
open_last_lookups fs/namei.c:4583 [inline]
path_openat+0x1395/0x3860 fs/namei.c:4827
do_file_open+0x23e/0x4a0 fs/namei.c:4859
do_sys_openat2+0x113/0x200 fs/open.c:1366
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1383
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff61fb9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff620a0d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff61fe15fa0 RCX: 00007ff61fb9c799
RDX: 0000000000042842 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007ff61fc32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000008d R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff61fe16038 R14: 00007ff61fe15fa0 R15: 00007ffdf473f928
</TASK>
(syz.4.719,10360,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x438, computed 0x1cec3d0f. Applying ECC.
(syz.4.719,10360,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x438, computed 0x1cec3d0f
(syz.4.719,10360,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.4.719,10360,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop4): find_tree_dqentry: Can't read quota tree block 4
Quota error (device loop4): qtree_read_dquot: Can't read quota structure for id 0
(syz.4.719,10360,0):ocfs2_acquire_dquot:890 ERROR: status = -5
(syz.4.719,10360,0):ocfs2_mknod:318 ERROR: status = -5
(syz.4.719,10360,0):ocfs2_mknod:506 ERROR: status = -5
(syz.4.719,10360,0):ocfs2_create:679 ERROR: status = -5