======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.4.42/4612 is trying to acquire lock:
ffff888055ad42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
ffff888055ad42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_del_inode_from_orphan+0x131/0x730 fs/ocfs2/namei.c:2713
but task is already holding lock:
ffff888055ada2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline]
ffff888055ada2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x386/0x10f0 fs/ocfs2/aops.c:2431
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
down_write+0x36/0x60 kernel/locking/rwsem.c:1573
ocfs2_create_local_dquot+0x1a0/0x1790 fs/ocfs2/quota_local.c:1224
ocfs2_acquire_dquot+0x7ae/0xb10 fs/ocfs2/quota_global.c:871
dqget+0x778/0xeb0 fs/quota/dquot.c:988
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ocfs2_get_init_inode+0x138/0x1b0 fs/ocfs2/namei.c:202
ocfs2_mknod+0x8be/0x2350 fs/ocfs2/namei.c:310
ocfs2_mkdir+0x1b6/0x4a0 fs/ocfs2/namei.c:657
vfs_mkdir+0x387/0x570 fs/namei.c:4114
do_mkdirat+0x1d0/0x430 fs/namei.c:4139
__do_sys_mkdirat fs/namei.c:4154 [inline]
__se_sys_mkdirat fs/namei.c:4152 [inline]
__x64_sys_mkdirat+0x85/0x90 fs/namei.c:4152
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #2 (&dquot->dq_lock){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747
wait_on_dquot fs/quota/dquot.c:356 [inline]
dqget+0x6f8/0xeb0 fs/quota/dquot.c:983
__dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517
ocfs2_get_init_inode+0x138/0x1b0 fs/ocfs2/namei.c:202
ocfs2_mknod+0x8be/0x2350 fs/ocfs2/namei.c:310
ocfs2_mkdir+0x1b6/0x4a0 fs/ocfs2/namei.c:657
vfs_mkdir+0x387/0x570 fs/namei.c:4114
do_mkdirat+0x1d0/0x430 fs/namei.c:4139
__do_sys_mkdirat fs/namei.c:4154 [inline]
__se_sys_mkdirat fs/namei.c:4152 [inline]
__x64_sys_mkdirat+0x85/0x90 fs/namei.c:4152
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}:
down_write+0x36/0x60 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline]
ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline]
ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ocfs2_evict_inode+0x141b/0x41f0 fs/ocfs2/inode.c:1219
evict+0x485/0x870 fs/inode.c:705
ocfs2_dentry_iput+0x244/0x370 fs/ocfs2/dcache.c:418
__dentry_kill+0x431/0x650 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfa/0x1d0 fs/dcache.c:918
__fput+0x5e0/0x920 fs/file_table.c:328
task_work_run+0x1ca/0x250 kernel/task_work.c:203
get_signal+0x11a6/0x1350 kernel/signal.c:2648
arch_do_signal_or_restart+0xb7/0x1240 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
down_write+0x36/0x60 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
ocfs2_del_inode_from_orphan+0x131/0x730 fs/ocfs2/namei.c:2713
ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline]
ocfs2_dio_end_io+0x475/0x10f0 fs/ocfs2/aops.c:2431
dio_complete+0x26f/0x810 fs/direct-io.c:271
__blockdev_direct_IO+0x2e1d/0x3450 fs/direct-io.c:1326
ocfs2_direct_IO+0x23e/0x2b0 fs/ocfs2/aops.c:2468
generic_file_direct_write+0x3be/0x660 mm/filemap.c:3770
__generic_file_write_iter+0x1db/0x430 mm/filemap.c:3930
ocfs2_file_write_iter+0x1593/0x1df0 fs/ocfs2/file.c:2469
do_iter_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x62d/0xaf0 fs/read_write.c:861
iter_file_splice_write+0x665/0xc50 fs/splice.c:685
do_splice_from fs/splice.c:763 [inline]
direct_splice_actor+0xe1/0x130 fs/splice.c:950
splice_direct_to_actor+0x480/0xb60 fs/splice.c:896
do_splice_direct+0x1b0/0x2b0 fs/splice.c:1002
do_sendfile+0x5cc/0xeb0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
other info that might help us debug this:
Chain exists of:
&ocfs2_sysfile_lock_key[args->fi_sysfile_type] --> &dquot->dq_lock --> &ocfs2_quota_ip_alloc_sem_key
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&dquot->dq_lock);
lock(&ocfs2_quota_ip_alloc_sem_key);
lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]);
*** DEADLOCK ***
3 locks held by syz.4.42/4612:
#0: ffff8880238de460 (sb_writers#14){.+.+}-{0:0}, at: do_sendfile+0x5a9/0xeb0 fs/read_write.c:1254
#1: ffff888055ada648 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888055ada648 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: ocfs2_file_write_iter+0x438/0x1df0 fs/ocfs2/file.c:2399
#2: ffff888055ada2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline]
#2: ffff888055ada2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x386/0x10f0 fs/ocfs2/aops.c:2431
stack backtrace:
CPU: 0 PID: 4612 Comm: syz.4.42 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
<TASK>
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170
check_prev_add kernel/locking/lockdep.c:3090 [inline]
check_prevs_add kernel/locking/lockdep.c:3209 [inline]
validate_chain kernel/locking/lockdep.c:3825 [inline]
__lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
down_write+0x36/0x60 kernel/locking/rwsem.c:1573
inode_lock include/linux/fs.h:758 [inline]
ocfs2_del_inode_from_orphan+0x131/0x730 fs/ocfs2/namei.c:2713
ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline]
ocfs2_dio_end_io+0x475/0x10f0 fs/ocfs2/aops.c:2431
dio_complete+0x26f/0x810 fs/direct-io.c:271
__blockdev_direct_IO+0x2e1d/0x3450 fs/direct-io.c:1326
ocfs2_direct_IO+0x23e/0x2b0 fs/ocfs2/aops.c:2468
generic_file_direct_write+0x3be/0x660 mm/filemap.c:3770
__generic_file_write_iter+0x1db/0x430 mm/filemap.c:3930
ocfs2_file_write_iter+0x1593/0x1df0 fs/ocfs2/file.c:2469
do_iter_readv_writev fs/read_write.c:-1 [inline]
do_iter_write+0x62d/0xaf0 fs/read_write.c:861
iter_file_splice_write+0x665/0xc50 fs/splice.c:685
do_splice_from fs/splice.c:763 [inline]
direct_splice_actor+0xe1/0x130 fs/splice.c:950
splice_direct_to_actor+0x480/0xb60 fs/splice.c:896
do_splice_direct+0x1b0/0x2b0 fs/splice.c:1002
do_sendfile+0x5cc/0xeb0 fs/read_write.c:1255
__do_sys_sendfile64 fs/read_write.c:1323 [inline]
__se_sys_sendfile64+0x13b/0x190 fs/read_write.c:1309
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fdd1618efc9
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:00007fdd170dc038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fdd163e5fa0 RCX: 00007fdd1618efc9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007fdd16211f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd163e6038 R14: 00007fdd163e5fa0 R15: 00007fffc956fc28
</TASK>