======================================================
WARNING: possible circular locking dependency detected
6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0 Not tainted
------------------------------------------------------
syz-executor117/5918 is trying to acquire lock:
ffff88807ae5a2a0 (&lp->qli_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
ffff88807ae5a2a0 (&lp->qli_lock){+.+.}-{3:3}, at: xfs_dquot_detach_buf+0x2f/0x1a0 fs/xfs/xfs_dquot.c:83
but task is already holding lock:
ffff88807e57e230
(&l->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
(&l->lock){+.+.}-{3:3}, at: lock_list_lru_of_memcg+0x24b/0x4e0 mm/list_lru.c:77
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&l->lock){+.+.}-{3:3}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
lock_list_lru_of_memcg+0x24b/0x4e0 mm/list_lru.c:77
list_lru_add+0x59/0x270 mm/list_lru.c:164
xfs_buf_rele_cached fs/xfs/xfs_buf.c:1106 [inline]
xfs_buf_rele+0x4ca/0x15b0 fs/xfs/xfs_buf.c:1151
xfs_imap_lookup+0x26a/0x750 fs/xfs/libxfs/xfs_ialloc.c:2431
xfs_imap+0x54d/0x1090 fs/xfs/libxfs/xfs_ialloc.c:2514
xfs_iget_cache_miss fs/xfs/xfs_icache.c:644 [inline]
xfs_iget+0xaf6/0x2ec0 fs/xfs/xfs_icache.c:806
xfs_mountfs+0x13df/0x2410 fs/xfs/xfs_mount.c:919
xfs_fs_fill_super+0x12db/0x1590 fs/xfs/xfs_super.c:1791
get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
vfs_get_tree+0x90/0x2b0 fs/super.c:1814
do_new_mount+0x2be/0xb40 fs/namespace.c:3507
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (&bch->bc_lock){+.+.}-{3:3}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
_atomic_dec_and_lock+0xb8/0x130 lib/dec_and_lock.c:28
xfs_buf_rele_cached fs/xfs/xfs_buf.c:1085 [inline]
xfs_buf_rele+0x178/0x15b0 fs/xfs/xfs_buf.c:1151
xfs_imap_lookup+0x26a/0x750 fs/xfs/libxfs/xfs_ialloc.c:2431
xfs_imap+0x54d/0x1090 fs/xfs/libxfs/xfs_ialloc.c:2514
xfs_iget_cache_miss fs/xfs/xfs_icache.c:644 [inline]
xfs_iget+0xaf6/0x2ec0 fs/xfs/xfs_icache.c:806
xfs_mountfs+0x13df/0x2410 fs/xfs/xfs_mount.c:919
xfs_fs_fill_super+0x12db/0x1590 fs/xfs/xfs_super.c:1791
get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
vfs_get_tree+0x90/0x2b0 fs/super.c:1814
do_new_mount+0x2be/0xb40 fs/namespace.c:3507
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&bp->b_lock){+.+.}-{3:3}:
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
xfs_buf_rele_cached fs/xfs/xfs_buf.c:1084 [inline]
xfs_buf_rele+0x164/0x15b0 fs/xfs/xfs_buf.c:1151
xfs_dquot_attach_buf+0x33e/0x560 fs/xfs/xfs_dquot.c:1345
xfs_qm_quotacheck_dqadjust+0x13f/0x5e0 fs/xfs/xfs_qm.c:1341
xfs_qm_dqusage_adjust+0x6a8/0x850 fs/xfs/xfs_qm.c:1464
xfs_iwalk_ag_recs+0x4e3/0x820 fs/xfs/xfs_iwalk.c:209
xfs_iwalk_run_callbacks+0x218/0x470 fs/xfs/xfs_iwalk.c:370
xfs_iwalk_ag+0xa9a/0xbb0 fs/xfs/xfs_iwalk.c:476
xfs_iwalk_ag_work+0xfb/0x1b0 fs/xfs/xfs_iwalk.c:625
xfs_pwork_work+0x7f/0x190 fs/xfs/xfs_pwork.c:47
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
-> #0 (&lp->qli_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
xfs_dquot_detach_buf+0x2f/0x1a0 fs/xfs/xfs_dquot.c:83
xfs_qm_dquot_isolate+0x49d/0x1420 fs/xfs/xfs_qm.c:528
__list_lru_walk_one+0x170/0x470 mm/list_lru.c:301
list_lru_walk_one+0x3c/0x50 mm/list_lru.c:338
list_lru_shrink_walk include/linux/list_lru.h:240 [inline]
xfs_qm_shrink_scan+0x1e1/0x400 fs/xfs/xfs_qm.c:574
do_shrink_slab+0x72d/0x1160 mm/shrinker.c:437
shrink_slab+0x1093/0x14d0 mm/shrinker.c:664
drop_slab_node mm/vmscan.c:414 [inline]
drop_slab+0x142/0x280 mm/vmscan.c:432
drop_caches_sysctl_handler+0xbc/0x160 fs/drop_caches.c:68
proc_sys_call_handler+0x5ec/0x920 fs/proc/proc_sysctl.c:601
iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x11b/0x220 fs/splice.c:1164
splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x564/0x8a0 fs/read_write.c:1363
__do_sys_sendfile64 fs/read_write.c:1418 [inline]
__se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1410
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
other info that might help us debug this:
Chain exists of:
&lp->qli_lock --> &bch->bc_lock --> &l->lock
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&l->lock);
lock(&bch->bc_lock);
lock(&l->lock);
lock(&lp->qli_lock);
*** DEADLOCK ***
3 locks held by syz-executor117/5918:
#0: ffff88807dbce420 (sb_writers#3){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x220 fs/splice.c:1163
#1: ffff88807e57e230 (&l->lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock.h:351 [inline]
#1: ffff88807e57e230 (&l->lock){+.+.}-{3:3}, at: lock_list_lru_of_memcg+0x24b/0x4e0 mm/list_lru.c:77
#2: ffff88807ae5a388 (&xfs_dquot_group_class){+.+.}-{4:4}, at: xfs_dqlock_nowait fs/xfs/xfs_dquot.h:126 [inline]
#2: ffff88807ae5a388 (&xfs_dquot_group_class){+.+.}-{4:4}, at: xfs_qm_dquot_isolate+0x8d/0x1420 fs/xfs/xfs_qm.c:467
stack backtrace:
CPU: 0 UID: 0 PID: 5918 Comm: syz-executor117 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
check_prev_add kernel/locking/lockdep.c:3161 [inline]
check_prevs_add kernel/locking/lockdep.c:3280 [inline]
validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
xfs_dquot_detach_buf+0x2f/0x1a0 fs/xfs/xfs_dquot.c:83
xfs_qm_dquot_isolate+0x49d/0x1420 fs/xfs/xfs_qm.c:528
__list_lru_walk_one+0x170/0x470 mm/list_lru.c:301
list_lru_walk_one+0x3c/0x50 mm/list_lru.c:338
list_lru_shrink_walk include/linux/list_lru.h:240 [inline]
xfs_qm_shrink_scan+0x1e1/0x400 fs/xfs/xfs_qm.c:574
do_shrink_slab+0x72d/0x1160 mm/shrinker.c:437
shrink_slab+0x1093/0x14d0 mm/shrinker.c:664
drop_slab_node mm/vmscan.c:414 [inline]
drop_slab+0x142/0x280 mm/vmscan.c:432
drop_caches_sysctl_handler+0xbc/0x160 fs/drop_caches.c:68
proc_sys_call_handler+0x5ec/0x920 fs/proc/proc_sysctl.c:601
iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x11b/0x220 fs/splice.c:1164
splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x564/0x8a0 fs/read_write.c:1363
__do_sys_sendfile64 fs/read_write.c:1418 [inline]
__se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1410
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f392b1c0319
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 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:00007ffd06cc4958 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f392b1c0319
RDX: 0000000020002080 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007ffd06cc4990 R09: 00007ffd06cc4990
R10: 000000000000023b R11: 0000000000000246 R12: 00007ffd06cc497c
R13: 0000000000000002 R14: 431bde82d7b634db R15: 00007ffd06cc49b0
</TASK>
syz-executor117 (5918): drop_caches: 2
syz-executor117 (5918): drop_caches: 2
loop3: detected capacity change from 0 to 32768
XFS: ikeep mount option is deprecated.
XFS (loop3): Mounting V5 Filesystem bfdc47fc-10d8-4eed-a562-11a831b3f791
XFS (loop3): Ending clean mount
XFS (loop3): Quotacheck needed: Please wait.
XFS (loop3): Quotacheck: Done.