syzbot

======================================================
WARNING: possible circular locking dependency detected
6.15.0-syzkaller-11802-g1af80d00e1e0 #0 Not tainted
------------------------------------------------------
syz-executor852/6001 is trying to acquire lock:
ffff8880772942c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
ffff8880772942c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}, at: ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2727

but task is already holding lock:
ffff888077353f60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2295 [inline]
ffff888077353f60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x389/0x10f0 fs/ocfs2/aops.c:2401

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&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_create_local_dquot+0x19d/0x1a40 fs/ocfs2/quota_local.c:1227
       ocfs2_acquire_dquot+0x80f/0xb30 fs/ocfs2/quota_global.c:883
       dqget+0x7b1/0xf10 fs/quota/dquot.c:977
       __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505
       ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:310
       ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:656
       vfs_mkdir+0x306/0x510 fs/namei.c:4366
       do_mkdirat+0x247/0x590 fs/namei.c:4399
       __do_sys_mkdirat fs/namei.c:4416 [inline]
       __se_sys_mkdirat fs/namei.c:4414 [inline]
       __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414
       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 (&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_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505
       ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:202
       ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:310
       ocfs2_mkdir+0x191/0x440 fs/ocfs2/namei.c:656
       vfs_mkdir+0x306/0x510 fs/namei.c:4366
       do_mkdirat+0x247/0x590 fs/namei.c:4399
       __do_sys_mkdirat fs/namei.c:4416 [inline]
       __se_sys_mkdirat fs/namei.c:4414 [inline]
       __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4414
       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 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{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:867 [inline]
       ocfs2_remove_inode fs/ocfs2/inode.c:669 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:832 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1093 [inline]
       ocfs2_evict_inode+0x153d/0x40e0 fs/ocfs2/inode.c:1230
       evict+0x504/0x9c0 fs/inode.c:810
       d_delete_notify include/linux/fsnotify.h:402 [inline]
       vfs_rmdir+0x3ec/0x520 fs/namei.c:4474
       do_rmdir+0x2ac/0x630 fs/namei.c:4516
       __do_sys_rmdir fs/namei.c:4535 [inline]
       __se_sys_rmdir fs/namei.c:4533 [inline]
       __x64_sys_rmdir+0x47/0x50 fs/namei.c:4533
       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 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{4:4}:
       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
       down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:867 [inline]
       ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2727
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2303 [inline]
       ocfs2_dio_end_io+0x479/0x10f0 fs/ocfs2/aops.c:2401
       dio_complete+0x25b/0x790 fs/direct-io.c:281
       __blockdev_direct_IO+0x2db6/0x33d0 fs/direct-io.c:1303
       ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438
       generic_file_direct_write+0x1d8/0x3e0 mm/filemap.c:4046
       __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4215
       ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469
       iter_file_splice_write+0x93a/0x1000 fs/splice.c:738
       do_splice_from fs/splice.c:935 [inline]
       direct_splice_actor+0xfe/0x160 fs/splice.c:1158
       splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102
       do_splice_direct_actor fs/splice.c:1201 [inline]
       do_splice_direct+0x181/0x270 fs/splice.c:1227
       do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
       __do_sys_sendfile64 fs/read_write.c:1431 [inline]
       __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
       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:
  &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-executor852/6001:
 #0: ffff888032006428 (sb_writers#8){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160 fs/splice.c:1157
 #1: ffff8880773542c0 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:867 [inline]
 #1: ffff8880773542c0 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x429/0x1d10 fs/ocfs2/file.c:2399
 #2: ffff888077353f60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2295 [inline]
 #2: ffff888077353f60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x389/0x10f0 fs/ocfs2/aops.c:2401

stack backtrace:
CPU: 0 UID: 0 PID: 6001 Comm: syz-executor852 Not tainted 6.15.0-syzkaller-11802-g1af80d00e1e0 #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
 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:867 [inline]
 ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2727
 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2303 [inline]
 ocfs2_dio_end_io+0x479/0x10f0 fs/ocfs2/aops.c:2401
 dio_complete+0x25b/0x790 fs/direct-io.c:281
 __blockdev_direct_IO+0x2db6/0x33d0 fs/direct-io.c:1303
 ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2438
 generic_file_direct_write+0x1d8/0x3e0 mm/filemap.c:4046
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4215
 ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469
 iter_file_splice_write+0x93a/0x1000 fs/splice.c:738
 do_splice_from fs/splice.c:935 [inline]
 direct_splice_actor+0xfe/0x160 fs/splice.c:1158
 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1102
 do_splice_direct_actor fs/splice.c:1201 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1227
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 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: 0033:0x7f2517644329
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:00007ffd46bda9d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f25176917e8 RCX: 00007f2517644329
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 6165627472616568 R08: 00007ffd46bdaa10 R09: 00007ffd46bdaa10
R10: 0000000000fffe82 R11: 0000000000000246 R12: 00007ffd46bda9fc
R13: 0000000000000028 R14: 431bde82d7b634db R15: 00007ffd46bdaa30
 </TASK>
(syz-executor852,6001,1):ocfs2_dio_end_io:2398 ERROR: Direct IO failed, bytes = -28