[syzbot] [ocfs2?] possible deadlock in ocfs2_extend_allocation
11 views
Skip to first unread message
syzbot
Jul 20, 2025, 10:32:37 AM7/20/25
to jl...@evilplan.org, jose...@linux.alibaba.com, linux-...@vger.kernel.org, ma...@fasheh.com, ocfs2...@lists.linux.dev, syzkall...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 155a3c003e55 Merge tag 'for-6.16/dm-fixes-2' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10a7658c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f09d04131ef56b22
dashboard link: https://syzkaller.appspot.com/bug?extid=2c472ed017e03a3e8bda
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8b4489a1d2de/disk-155a3c00.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1c498d4c0c85/vmlinux-155a3c00.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ea8acdf1d890/bzImage-155a3c00.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c472e...@syzkaller.appspotmail.com
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
(syz.2.45,6361,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 Not tainted
------------------------------------------------------
syz.2.45/6361 is trying to acquire lock:
ffff888052a28618 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
but task is already holding lock:
ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #7 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline]
ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 fs/ocfs2/suballoc.c:1179
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline]
ocfs2_lock_allocators+0x2fa/0x5c0 fs/ocfs2/suballoc.c:2772
ocfs2_extend_allocation+0x39b/0x17a0 fs/ocfs2/file.c:589
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #5 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313
ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x182/0xe80 kernel/locking/mutex.c:747
wait_on_dquot fs/quota/dquot.c:354 [inline]
dqget+0x72a/0xf10 fs/quota/dquot.c:972
dquot_transfer+0x2f8/0x6d0 fs/quota/dquot.c:2140
ext4_setattr+0x865/0x1bc0 fs/ext4/inode.c:5817
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #3 (&ei->xattr_sem){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
ext4_xattr_set_handle+0x165/0x1590 fs/ext4/xattr.c:2362
ext4_initxattrs+0x9f/0x110 fs/ext4/xattr_security.c:44
security_inode_init_security+0x2a0/0x3f0 security/security.c:1852
__ext4_new_inode+0x3257/0x3c50 fs/ext4/ialloc.c:1325
ext4_create+0x22d/0x460 fs/ext4/namei.c:2822
lookup_open fs/namei.c:3717 [inline]
open_last_lookups fs/namei.c:3816 [inline]
path_openat+0x14f4/0x3830 fs/namei.c:4052
do_filp_open+0x1fa/0x410 fs/namei.c:4082
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (jbd2_handle){++++}-{0:0}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
start_this_handle+0x1fa7/0x21c0 fs/jbd2/transaction.c:444
jbd2__journal_start+0x2c1/0x5b0 fs/jbd2/transaction.c:501
jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:540
ocfs2_start_trans+0x376/0x6d0 fs/ocfs2/journal.c:374
ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x78e/0xbd0 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930
ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
vfs_get_tree+0x92/0x2b0 fs/super.c:1804
do_new_mount+0x24a/0xa40 fs/namespace.c:3902
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372
ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x78e/0xbd0 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930
ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
vfs_get_tree+0x92/0x2b0 fs/super.c:1804
do_new_mount+0x24a/0xa40 fs/namespace.c:3902
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (sb_internal#6){.+.+}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_intwrite include/linux/fs.h:1978 [inline]
ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 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:
sb_internal#6 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
rlock(sb_internal#6);
*** DEADLOCK ***
6 locks held by syz.2.45/6361:
#0: ffff888052a28428 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write_file+0x60/0x200 fs/namespace.c:601
#1: ffff8880763409c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff8880763409c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: chown_common+0x313/0x5c0 fs/open.c:778
#2: ffff88807607e0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x2a3/0xb30 fs/ocfs2/quota_global.c:823
#3: ffff888076345f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#3: ffff888076345f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313
#4: ffff888076345be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
#5: ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#5: ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
stack backtrace:
CPU: 1 UID: 0 PID: 6361 Comm: syz.2.45 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046
check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_intwrite include/linux/fs.h:1978 [inline]
ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feefbb8e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feefc940038 EFLAGS: 00000246 ORIG_RAX: 000000000000005d
RAX: ffffffffffffffda RBX: 00007feefbdb5fa0 RCX: 00007feefbb8e929
RDX: 000000002108420a RSI: 000000003a736e6f RDI: 0000000000000004
RBP: 00007feefbc10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007feefbdb5fa0 R15: 00007ffcf2ccc4d8
</TASK>
(syz.2.45,6361,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC.
(syz.2.45,6361,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c
(syz.2.45,6361,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.2.45,6361,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop2): qtree_write_dquot: Error -5 occurred while creating quota
(syz.2.45,6361,0):ocfs2_acquire_dquot:890 ERROR: status = -5
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 155a3c003e55 Merge tag 'for-6.16/dm-fixes-2' of git://git...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10a7658c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f09d04131ef56b22
dashboard link: https://syzkaller.appspot.com/bug?extid=2c472ed017e03a3e8bda
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/8b4489a1d2de/disk-155a3c00.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1c498d4c0c85/vmlinux-155a3c00.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ea8acdf1d890/bzImage-155a3c00.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c472e...@syzkaller.appspotmail.com
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode.
(syz.2.45,6361,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
======================================================
WARNING: possible circular locking dependency detected
6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 Not tainted
------------------------------------------------------
syz.2.45/6361 is trying to acquire lock:
ffff888052a28618 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
but task is already holding lock:
ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #7 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline]
ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 fs/ocfs2/suballoc.c:1179
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline]
ocfs2_lock_allocators+0x2fa/0x5c0 fs/ocfs2/suballoc.c:2772
ocfs2_extend_allocation+0x39b/0x17a0 fs/ocfs2/file.c:589
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #5 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
inode_lock include/linux/fs.h:869 [inline]
ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313
ocfs2_acquire_dquot+0x2b0/0xb30 fs/ocfs2/quota_global.c:828
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
__mutex_lock_common kernel/locking/mutex.c:602 [inline]
__mutex_lock+0x182/0xe80 kernel/locking/mutex.c:747
wait_on_dquot fs/quota/dquot.c:354 [inline]
dqget+0x72a/0xf10 fs/quota/dquot.c:972
dquot_transfer+0x2f8/0x6d0 fs/quota/dquot.c:2140
ext4_setattr+0x865/0x1bc0 fs/ext4/inode.c:5817
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #3 (&ei->xattr_sem){++++}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
ext4_xattr_set_handle+0x165/0x1590 fs/ext4/xattr.c:2362
ext4_initxattrs+0x9f/0x110 fs/ext4/xattr_security.c:44
security_inode_init_security+0x2a0/0x3f0 security/security.c:1852
__ext4_new_inode+0x3257/0x3c50 fs/ext4/ialloc.c:1325
ext4_create+0x22d/0x460 fs/ext4/namei.c:2822
lookup_open fs/namei.c:3717 [inline]
open_last_lookups fs/namei.c:3816 [inline]
path_openat+0x14f4/0x3830 fs/namei.c:4052
do_filp_open+0x1fa/0x410 fs/namei.c:4082
do_sys_openat2+0x121/0x1c0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x138/0x170 fs/open.c:1463
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #2 (jbd2_handle){++++}-{0:0}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
start_this_handle+0x1fa7/0x21c0 fs/jbd2/transaction.c:444
jbd2__journal_start+0x2c1/0x5b0 fs/jbd2/transaction.c:501
jbd2_journal_start+0x2a/0x40 fs/jbd2/transaction.c:540
ocfs2_start_trans+0x376/0x6d0 fs/ocfs2/journal.c:374
ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x78e/0xbd0 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930
ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
vfs_get_tree+0x92/0x2b0 fs/super.c:1804
do_new_mount+0x24a/0xa40 fs/namespace.c:3902
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
down_read+0x46/0x2e0 kernel/locking/rwsem.c:1524
ocfs2_start_trans+0x36a/0x6d0 fs/ocfs2/journal.c:372
ocfs2_modify_bh+0xe8/0x470 fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x1465/0x17e0 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x78e/0xbd0 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x2e1/0x5d0 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x1c6/0x450 fs/ocfs2/super.c:930
ocfs2_fill_super+0x5115/0x63d0 fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1681
vfs_get_tree+0x92/0x2b0 fs/super.c:1804
do_new_mount+0x24a/0xa40 fs/namespace.c:3902
do_mount fs/namespace.c:4239 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4427
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
-> #0 (sb_internal#6){.+.+}-{0:0}:
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_intwrite include/linux/fs.h:1978 [inline]
ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 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:
sb_internal#6 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
rlock(sb_internal#6);
*** DEADLOCK ***
6 locks held by syz.2.45/6361:
#0: ffff888052a28428 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write_file+0x60/0x200 fs/namespace.c:601
#1: ffff8880763409c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff8880763409c0 (&type->i_mutex_dir_key#16){++++}-{4:4}, at: chown_common+0x313/0x5c0 fs/open.c:778
#2: ffff88807607e0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x2a3/0xb30 fs/ocfs2/quota_global.c:823
#3: ffff888076345f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#3: ffff888076345f40 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313
#4: ffff888076345be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314
#5: ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#5: ffff888076345100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 fs/ocfs2/suballoc.c:788
stack backtrace:
CPU: 1 UID: 0 PID: 6361 Comm: syz.2.45 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2046
check_noncircular+0x134/0x160 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3168 [inline]
check_prevs_add kernel/locking/lockdep.c:3287 [inline]
validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3911
__lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5240
lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5871
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1795 [inline]
sb_start_intwrite include/linux/fs.h:1978 [inline]
ocfs2_start_trans+0x26b/0x6d0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x6d4/0x17a0 fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x20e/0x4a0 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x6c6/0xb30 fs/ocfs2/quota_global.c:853
dqget+0x7ae/0xf10 fs/quota/dquot.c:977
ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233
notify_change+0xb36/0xe40 fs/attr.c:552
chown_common+0x40c/0x5c0 fs/open.c:790
vfs_fchown fs/open.c:858 [inline]
ksys_fchown+0xea/0x160 fs/open.c:870
__do_sys_fchown fs/open.c:875 [inline]
__se_sys_fchown fs/open.c:873 [inline]
__x64_sys_fchown+0x7a/0x90 fs/open.c:873
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feefbb8e929
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007feefc940038 EFLAGS: 00000246 ORIG_RAX: 000000000000005d
RAX: ffffffffffffffda RBX: 00007feefbdb5fa0 RCX: 00007feefbb8e929
RDX: 000000002108420a RSI: 000000003a736e6f RDI: 0000000000000004
RBP: 00007feefbc10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007feefbdb5fa0 R15: 00007ffcf2ccc4d8
</TASK>
(syz.2.45,6361,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC.
(syz.2.45,6361,0):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c
(syz.2.45,6361,0):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.2.45,6361,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop2): qtree_write_dquot: Error -5 occurred while creating quota
(syz.2.45,6361,0):ocfs2_acquire_dquot:890 ERROR: status = -5
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Aug 19, 2025, 3:31:30 AM8/19/25
to jl...@evilplan.org, jose...@linux.alibaba.com, linux-...@vger.kernel.org, ma...@fasheh.com, ocfs2...@lists.linux.dev, syzkall...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 8f5ae30d69d7 Linux 6.17-rc1
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1437c6f0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1237c6f0580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104b5ba2580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/18a2e4bd0c4a/disk-8f5ae30d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b5395881b25/vmlinux-8f5ae30d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e875f4e3b7ff/Image-8f5ae30d.gz.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/97c3dc76fbdd/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=178b5ba2580000)
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/0eab8e48ed5e/mount_1.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=1037c6f0580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c472e...@syzkaller.appspotmail.com
(syz.3.28,6801,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xb3775c19, computed 0x2dd1c265. Applying ECC.
(syz.3.28,6801,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
------------------------------------------------------
syz.3.28/6801 is trying to acquire lock:
ffff0000cc700618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
but task is already holding lock:
ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #7 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:869 [inline]
ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline]
ocfs2_reserve_clusters_with_limit+0x290/0x9e0 fs/ocfs2/suballoc.c:1179
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline]
ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2772
ocfs2_extend_allocation+0x328/0x14cc fs/ocfs2/file.c:589
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #5 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:869 [inline]
ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
__mutex_lock_common+0x1d0/0x24ac kernel/locking/mutex.c:598
__mutex_lock kernel/locking/mutex.c:760 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812
wait_on_dquot fs/quota/dquot.c:354 [inline]
dqget+0x5e4/0xccc fs/quota/dquot.c:972
dquot_transfer+0x238/0x560 fs/quota/dquot.c:2140
ext4_setattr+0x738/0x1810 fs/ext4/inode.c:5902
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #3 (&ei->xattr_sem){++++}-{4:4}:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
ext4_xattr_set_handle+0x11c/0x1260 fs/ext4/xattr.c:2362
ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44
security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58
__ext4_new_inode+0x27f4/0x3190 fs/ext4/ialloc.c:1325
ext4_create+0x1f8/0x3fc fs/ext4/namei.c:2822
lookup_open fs/namei.c:3708 [inline]
open_last_lookups fs/namei.c:3807 [inline]
path_openat+0x12d8/0x2c40 fs/namei.c:4043
do_filp_open+0x18c/0x36c fs/namei.c:4073
do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
do_sys_open fs/open.c:1450 [inline]
__do_sys_openat fs/open.c:1466 [inline]
__se_sys_openat fs/open.c:1461 [inline]
__arm64_sys_openat+0x120/0x158 fs/open.c:1461
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #2 (jbd2_handle){++++}-{0:0}:
start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444
jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501
jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540
ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374
ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
get_tree_bdev+0x2c/0x3c fs/super.c:1715
ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
vfs_get_tree+0x90/0x28c fs/super.c:1815
do_new_mount+0x278/0x7f4 fs/namespace.c:3805
path_mount+0x5b4/0xde0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
get_tree_bdev+0x2c/0x3c fs/super.c:1715
ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
vfs_get_tree+0x90/0x28c fs/super.c:1815
do_new_mount+0x278/0x7f4 fs/namespace.c:3805
path_mount+0x5b4/0xde0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #0 (sb_internal#2){.+.+}-{0:0}:
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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
sb_start_intwrite include/linux/fs.h:1981 [inline]
ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
other info that might help us debug this:
Chain exists of:
sb_internal#2 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]);
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]);
rlock(sb_internal#2);
*** DEADLOCK ***
6 locks held by syz.3.28/6801:
#0: ffff0000cc700428 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:601
#1: ffff0000f6f009c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff0000f6f009c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: chown_common+0x290/0x4dc fs/open.c:779
#2: ffff0000e2d2a0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823
#3: ffff0000f6f05f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#3: ffff0000f6f05f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
#4: ffff0000f6f05be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
#5: ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#5: ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
stack backtrace:
CPU: 1 UID: 0 PID: 6801 Comm: syz.3.28 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
__dump_stack+0x30/0x40 lib/dump_stack.c:94
dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
dump_stack+0x1c/0x28 lib/dump_stack.c:129
print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
check_noncircular+0x154/0x174 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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
sb_start_intwrite include/linux/fs.h:1981 [inline]
ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
(syz.3.28,6801,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC.
(syz.3.28,6801,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c
(syz.3.28,6801,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.3.28,6801,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop3): qtree_write_dquot: Error -5 occurred while creating quota
(syz.3.28,6801,1):ocfs2_acquire_dquot:890 ERROR: status = -5
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 8f5ae30d69d7 Linux 6.17-rc1
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=1437c6f0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8c5ac3d8b8abfcb
dashboard link: https://syzkaller.appspot.com/bug?extid=2c472ed017e03a3e8bda
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
userspace arch: arm64
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1237c6f0580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=104b5ba2580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/18a2e4bd0c4a/disk-8f5ae30d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3b5395881b25/vmlinux-8f5ae30d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e875f4e3b7ff/Image-8f5ae30d.gz.xz
mounted in repro #1: https://storage.googleapis.com/syzbot-assets/97c3dc76fbdd/mount_0.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=178b5ba2580000)
mounted in repro #2: https://storage.googleapis.com/syzbot-assets/0eab8e48ed5e/mount_1.gz
fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=1037c6f0580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2c472e...@syzkaller.appspotmail.com
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,3) on (node local, slot 0) with ordered data mode.
(syz.3.28,6801,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
======================================================
WARNING: possible circular locking dependency detected
6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 Not tainted
WARNING: possible circular locking dependency detected
------------------------------------------------------
syz.3.28/6801 is trying to acquire lock:
ffff0000cc700618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
but task is already holding lock:
ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:869 [inline]
ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
ocfs2_reserve_cluster_bitmap_bits fs/ocfs2/suballoc.c:1134 [inline]
ocfs2_reserve_clusters_with_limit+0x290/0x9e0 fs/ocfs2/suballoc.c:1179
ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1229 [inline]
ocfs2_lock_allocators+0x27c/0x518 fs/ocfs2/suballoc.c:2772
ocfs2_extend_allocation+0x328/0x14cc fs/ocfs2/file.c:589
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #5 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
inode_lock include/linux/fs.h:869 [inline]
ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
__mutex_lock kernel/locking/mutex.c:760 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812
wait_on_dquot fs/quota/dquot.c:354 [inline]
dqget+0x5e4/0xccc fs/quota/dquot.c:972
dquot_transfer+0x238/0x560 fs/quota/dquot.c:2140
ext4_setattr+0x738/0x1810 fs/ext4/inode.c:5902
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #3 (&ei->xattr_sem){++++}-{4:4}:
ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
ext4_xattr_set_handle+0x11c/0x1260 fs/ext4/xattr.c:2362
ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44
security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58
__ext4_new_inode+0x27f4/0x3190 fs/ext4/ialloc.c:1325
ext4_create+0x1f8/0x3fc fs/ext4/namei.c:2822
lookup_open fs/namei.c:3708 [inline]
open_last_lookups fs/namei.c:3807 [inline]
path_openat+0x12d8/0x2c40 fs/namei.c:4043
do_filp_open+0x18c/0x36c fs/namei.c:4073
do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
do_sys_open fs/open.c:1450 [inline]
__do_sys_openat fs/open.c:1466 [inline]
__se_sys_openat fs/open.c:1461 [inline]
__arm64_sys_openat+0x120/0x158 fs/open.c:1461
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #2 (jbd2_handle){++++}-{0:0}:
jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501
jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540
ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374
ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
get_tree_bdev+0x2c/0x3c fs/super.c:1715
ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
vfs_get_tree+0x90/0x28c fs/super.c:1815
do_new_mount+0x278/0x7f4 fs/namespace.c:3805
path_mount+0x5b4/0xde0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
get_tree_bdev+0x2c/0x3c fs/super.c:1715
ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
vfs_get_tree+0x90/0x28c fs/super.c:1815
do_new_mount+0x278/0x7f4 fs/namespace.c:3805
path_mount+0x5b4/0xde0 fs/namespace.c:4120
do_mount fs/namespace.c:4133 [inline]
__do_sys_mount fs/namespace.c:4344 [inline]
__se_sys_mount fs/namespace.c:4321 [inline]
__arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4321
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
-> #0 (sb_internal#2){.+.+}-{0:0}:
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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1798 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
sb_start_intwrite include/linux/fs.h:1981 [inline]
ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
other info that might help us debug this:
Chain exists of:
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]);
rlock(sb_internal#2);
*** DEADLOCK ***
6 locks held by syz.3.28/6801:
#0: ffff0000cc700428 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:601
#1: ffff0000f6f009c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:874 [inline]
#1: ffff0000f6f009c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: chown_common+0x290/0x4dc fs/open.c:779
#2: ffff0000e2d2a0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823
#3: ffff0000f6f05f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#3: ffff0000f6f05f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
#4: ffff0000f6f05be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
#5: ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#5: ffff0000f6f05100 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
stack backtrace:
CPU: 1 UID: 0 PID: 6801 Comm: syz.3.28 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
__dump_stack+0x30/0x40 lib/dump_stack.c:94
dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
dump_stack+0x1c/0x28 lib/dump_stack.c:129
print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
check_noncircular+0x154/0x174 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+0x1774/0x30a4 kernel/locking/lockdep.c:5237
lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
__sb_start_write include/linux/fs.h:1798 [inline]
percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
sb_start_intwrite include/linux/fs.h:1981 [inline]
ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
ocfs2_extend_allocation+0x5d4/0x14cc fs/ocfs2/file.c:597
ocfs2_extend_no_holes+0x1a8/0x424 fs/ocfs2/file.c:1027
ocfs2_acquire_dquot+0x530/0xa10 fs/ocfs2/quota_global.c:853
dqget+0x654/0xccc fs/quota/dquot.c:977
ocfs2_setattr+0xb30/0x17a0 fs/ocfs2/file.c:1233
notify_change+0x9a4/0xc50 fs/attr.c:552
chown_common+0x374/0x4dc fs/open.c:791
vfs_fchown fs/open.c:859 [inline]
ksys_fchown+0xe0/0x158 fs/open.c:871
__do_sys_fchown fs/open.c:876 [inline]
__se_sys_fchown fs/open.c:874 [inline]
__arm64_sys_fchown+0x7c/0x94 fs/open.c:874
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879
el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
(syz.3.28,6801,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC.
(syz.3.28,6801,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c
(syz.3.28,6801,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.3.28,6801,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop3): qtree_write_dquot: Error -5 occurred while creating quota
(syz.3.28,6801,1):ocfs2_acquire_dquot:890 ERROR: status = -5
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
Reply all
Reply to author
Forward
0 new messages