EXT4-fs error (device loop0): __ext4_ext_dirty:183: inode #3: comm syz-executor334: mark_inode_dirty error
EXT4-fs error (device loop0): ext4_acquire_dquot:6204: comm syz-executor334: Failed to acquire dquot type 0
======================================================
WARNING: possible circular locking dependency detected
5.15.181-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor334/4116 is trying to acquire lock:
ffff0000de3f2ce8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507
but task is already holding lock:
ffff0000de3fe628 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x7bc/0xf94 fs/ext4/inode.c:4245
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (&ei->i_data_sem/2){++++}-{3:3}:
down_read+0xc0/0x390 kernel/locking/rwsem.c:1498
ext4_map_blocks+0x288/0x167c fs/ext4/inode.c:598
ext4_getblk+0x138/0x5f0 fs/ext4/inode.c:870
ext4_bread+0x3c/0x1d4 fs/ext4/inode.c:923
ext4_quota_write+0x220/0x52c fs/ext4/super.c:6591
write_blk fs/quota/quota_tree.c:64 [inline]
get_free_dqblk+0x2d4/0x680 fs/quota/quota_tree.c:125
do_insert_tree+0x1e4/0x1424 fs/quota/quota_tree.c:335
do_insert_tree+0x450/0x1424 fs/quota/quota_tree.c:366
do_insert_tree+0x450/0x1424 fs/quota/quota_tree.c:366
do_insert_tree+0x450/0x1424 fs/quota/quota_tree.c:366
dq_insert_tree fs/quota/quota_tree.c:392 [inline]
qtree_write_dquot+0x2c4/0x3f8 fs/quota/quota_tree.c:411
v2_write_dquot+0xf0/0x180 fs/quota/quota_v2.c:358
dquot_acquire+0x2b0/0x510 fs/quota/dquot.c:472
ext4_acquire_dquot+0x270/0x428 fs/ext4/super.c:6200
dqget+0x658/0xcf4 fs/quota/dquot.c:988
__dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517
dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579
ext4_process_orphan+0x5c/0x2b4 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0x888/0xf8c fs/ext4/orphan.c:474
ext4_fill_super+0x7a5c/0x812c fs/ext4/super.c:4975
mount_bdev+0x264/0x358 fs/super.c:1400
ext4_mount+0x44/0x58 fs/ext4/super.c:6627
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x228/0x810 fs/namespace.c:3013
path_mount+0x5b4/0x1000 fs/namespace.c:3343
do_mount fs/namespace.c:3356 [inline]
__do_sys_mount fs/namespace.c:3564 [inline]
__se_sys_mount fs/namespace.c:3541 [inline]
__arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}:
down_read+0xc0/0x390 kernel/locking/rwsem.c:1498
v2_read_dquot+0x4c/0x118 fs/quota/quota_v2.c:332
dquot_acquire+0x120/0x510 fs/quota/dquot.c:463
ext4_acquire_dquot+0x270/0x428 fs/ext4/super.c:6200
dqget+0x658/0xcf4 fs/quota/dquot.c:988
__dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1517
dquot_initialize+0x24/0x34 fs/quota/dquot.c:1579
ext4_process_orphan+0x5c/0x2b4 fs/ext4/orphan.c:329
ext4_orphan_cleanup+0x888/0xf8c fs/ext4/orphan.c:474
ext4_fill_super+0x7a5c/0x812c fs/ext4/super.c:4975
mount_bdev+0x264/0x358 fs/super.c:1400
ext4_mount+0x44/0x58 fs/ext4/super.c:6627
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x228/0x810 fs/namespace.c:3013
path_mount+0x5b4/0x1000 fs/namespace.c:3343
do_mount fs/namespace.c:3356 [inline]
__do_sys_mount fs/namespace.c:3564 [inline]
__se_sys_mount fs/namespace.c:3541 [inline]
__arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012
lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743
dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507
ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6180
ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6257
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412
__dquot_free_space+0x76c/0xaa8 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1900/0x23cc fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2523 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2689 [inline]
ext4_ext_remove_space+0x1d98/0x3830 fs/ext4/extents.c:2937
ext4_ext_truncate+0x184/0x24c fs/ext4/extents.c:4471
ext4_truncate+0x9c0/0xf94 fs/ext4/inode.c:4250
ext4_evict_inode+0xbec/0x11dc fs/ext4/inode.c:289
evict+0x3c8/0x810 fs/inode.c:647
iput_final fs/inode.c:1769 [inline]
iput+0x6c4/0x77c fs/inode.c:1795
ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:360
ext4_orphan_cleanup+0x888/0xf8c fs/ext4/orphan.c:474
ext4_fill_super+0x7a5c/0x812c fs/ext4/super.c:4975
mount_bdev+0x264/0x358 fs/super.c:1400
ext4_mount+0x44/0x58 fs/ext4/super.c:6627
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x228/0x810 fs/namespace.c:3013
path_mount+0x5b4/0x1000 fs/namespace.c:3343
do_mount fs/namespace.c:3356 [inline]
__do_sys_mount fs/namespace.c:3564 [inline]
__se_sys_mount fs/namespace.c:3541 [inline]
__arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
other info that might help us debug this:
Chain exists of:
&dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/2);
lock(&s->s_dquot.dqio_sem);
lock(&ei->i_data_sem/2);
lock(&dquot->dq_lock);
*** DEADLOCK ***
4 locks held by syz-executor334/4116:
#0: ffff0000c8a180e0 (&type->s_umount_key#26/1){+.+.}-{3:3}, at: alloc_super+0x1a8/0x824 fs/super.c:229
#1: ffff0000c8a18650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline]
#1: ffff0000c8a18650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline]
#1: ffff0000c8a18650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x3d8/0x11dc fs/ext4/inode.c:243
#2: ffff0000de3fe628 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x7bc/0xf94 fs/ext4/inode.c:4245
#3: ffff800014438658 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311
stack backtrace:
CPU: 1 PID: 4116 Comm: syz-executor334 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
__dump_stack+0x30/0x40 lib/dump_stack.c:88
dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
dump_stack+0x1c/0x5c lib/dump_stack.c:113
print_circular_bug+0x148/0x1b0 kernel/locking/lockdep.c:2011
check_noncircular+0x240/0x2d4 kernel/locking/lockdep.c:2133
check_prev_add kernel/locking/lockdep.c:3053 [inline]
check_prevs_add kernel/locking/lockdep.c:3172 [inline]
validate_chain kernel/locking/lockdep.c:3788 [inline]
__lock_acquire+0x2928/0x651c kernel/locking/lockdep.c:5012
lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
__mutex_lock_common+0x194/0x1edc kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0xac/0x11c kernel/locking/mutex.c:743
dquot_commit+0x50/0x1c4 fs/quota/dquot.c:507
ext4_write_dquot+0x1b4/0x31c fs/ext4/super.c:6180
ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6257
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412
__dquot_free_space+0x76c/0xaa8 fs/quota/dquot.c:1942
dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
dquot_free_space include/linux/quotaops.h:381 [inline]
dquot_free_block include/linux/quotaops.h:392 [inline]
ext4_mb_clear_bb fs/ext4/mballoc.c:6156 [inline]
ext4_free_blocks+0x1900/0x23cc fs/ext4/mballoc.c:6286
ext4_remove_blocks fs/ext4/extents.c:2523 [inline]
ext4_ext_rm_leaf fs/ext4/extents.c:2689 [inline]
ext4_ext_remove_space+0x1d98/0x3830 fs/ext4/extents.c:2937
ext4_ext_truncate+0x184/0x24c fs/ext4/extents.c:4471
ext4_truncate+0x9c0/0xf94 fs/ext4/inode.c:4250
ext4_evict_inode+0xbec/0x11dc fs/ext4/inode.c:289
evict+0x3c8/0x810 fs/inode.c:647
iput_final fs/inode.c:1769 [inline]
iput+0x6c4/0x77c fs/inode.c:1795
ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:360
ext4_orphan_cleanup+0x888/0xf8c fs/ext4/orphan.c:474
ext4_fill_super+0x7a5c/0x812c fs/ext4/super.c:4975
mount_bdev+0x264/0x358 fs/super.c:1400
ext4_mount+0x44/0x58 fs/ext4/super.c:6627
legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
vfs_get_tree+0x90/0x274 fs/super.c:1530
do_new_mount+0x228/0x810 fs/namespace.c:3013
path_mount+0x5b4/0x1000 fs/namespace.c:3343
do_mount fs/namespace.c:3356 [inline]
__do_sys_mount fs/namespace.c:3564 [inline]
__se_sys_mount fs/namespace.c:3541 [inline]
__arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
EXT4-fs (loop0): 1 orphan inode deleted
EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue. Quota mode: writeback.