syzbot

======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.216/8552 is trying to acquire lock:
ffff88805bf59c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
ffff88805bf59c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]
ffff88805bf59c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]
ffff88805bf59c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
ffff88805bf59c40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0x1539/0x42c0 fs/ocfs2/inode.c:1299

but task is already holding lock:
ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:854 [inline]
ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x42c0 fs/ocfs2/inode.c:1299

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x3a/0x50 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:1027 [inline]
       ocfs2_del_inode_from_orphan+0x12e/0x7a0 fs/ocfs2/namei.c:2731
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline]
       ocfs2_dio_end_io+0x545/0x1210 fs/ocfs2/aops.c:2404
       dio_complete+0x25e/0x790 fs/direct-io.c:281
       __blockdev_direct_IO+0x2d0e/0x3330 fs/direct-io.c:1303
       ocfs2_direct_IO+0x253/0x2c0 fs/ocfs2/aops.c:2441
       generic_file_direct_write+0x1dc/0x3e0 mm/filemap.c:4248
       __generic_file_write_iter+0x120/0x240 mm/filemap.c:4417
       ocfs2_file_write_iter+0x1666/0x1e30 fs/ocfs2/file.c:2475
       iter_file_splice_write+0x9a0/0x1100 fs/splice.c:738
       do_splice_from fs/splice.c:938 [inline]
       direct_splice_actor+0x104/0x160 fs/splice.c:1161
       splice_direct_to_actor+0x545/0xc80 fs/splice.c:1105
       do_splice_direct_actor fs/splice.c:1204 [inline]
       do_splice_direct+0x19b/0x2a0 fs/splice.c:1230
       do_sendfile+0x547/0x7e0 fs/read_write.c:1370
       __do_sys_sendfile64 fs/read_write.c:1431 [inline]
       __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1417
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x3a/0x50 kernel/locking/rwsem.c:1590
       ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227
       ocfs2_acquire_dquot+0x816/0xb20 fs/ocfs2/quota_global.c:883
       dqget+0x7b6/0xf10 fs/quota/dquot.c:980
       dquot_set_dqblk+0x2b/0xfa0 fs/quota/dquot.c:2823
       quota_setquota+0x4e0/0x590 fs/quota/quota.c:310
       __do_sys_quotactl fs/quota/quota.c:961 [inline]
       __se_sys_quotactl+0x2a8/0x990 fs/quota/quota.c:917
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock_common kernel/locking/rtmutex_api.c:533 [inline]
       mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:552
       wait_on_dquot fs/quota/dquot.c:357 [inline]
       dqget+0x72f/0xf10 fs/quota/dquot.c:975
       __dquot_initialize+0x3ba/0xd30 fs/quota/dquot.c:1508
       ocfs2_get_init_inode+0x147/0x1c0 fs/ocfs2/namei.c:206
       ocfs2_mknod+0x86f/0x2210 fs/ocfs2/namei.c:314
       ocfs2_mkdir+0x181/0x430 fs/ocfs2/namei.c:660
       vfs_mkdir+0x75d/0x870 fs/namei.c:5139
       do_mkdirat+0x281/0x4c0 fs/namei.c:5173
       __do_sys_mkdirat fs/namei.c:5195 [inline]
       __se_sys_mkdirat fs/namei.c:5193 [inline]
       __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5193
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
       lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868
       down_write+0x3a/0x50 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:1027 [inline]
       ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]
       ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]
       ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
       ocfs2_evict_inode+0x1539/0x42c0 fs/ocfs2/inode.c:1299
       evict+0x61e/0xb10 fs/inode.c:837
       d_delete_notify include/linux/fsnotify.h:377 [inline]
       vfs_rmdir+0x3f7/0x670 fs/namei.c:5258
       do_rmdir+0x278/0x470 fs/namei.c:5300
       __do_sys_rmdir fs/namei.c:5324 [inline]
       __se_sys_rmdir fs/namei.c:5322 [inline]
       __x64_sys_rmdir+0x47/0x50 fs/namei.c:5322
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xe2/0xf80 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[INODE_ALLOC_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
                               lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]);
  lock(&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

4 locks held by syz.1.216/8552:
 #0: ffff888039ace480 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499
 #1: ffff88805bca7000 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
 #1: ffff88805bca7000 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2873 [inline]
 #1: ffff88805bca7000 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2884 [inline]
 #1: ffff88805bca7000 (&type->i_mutex_dir_key#19/1){+.+.}-{4:4}, at: do_rmdir+0x1c6/0x470 fs/namei.c:5293
 #2: ffff88805c67ce30 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0x106/0x270 fs/ocfs2/dlmglue.c:2875
 #3: ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
 #3: ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:854 [inline]
 #3: ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
 #3: ffff88805bca5f40 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_evict_inode+0xe97/0x42c0 fs/ocfs2/inode.c:1299

stack backtrace:
CPU: 1 UID: 0 PID: 8552 Comm: syz.1.216 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043
 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0x106/0x330 kernel/locking/lockdep.c:5868
 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590
 inode_lock include/linux/fs.h:1027 [inline]
 ocfs2_remove_inode fs/ocfs2/inode.c:733 [inline]
 ocfs2_wipe_inode fs/ocfs2/inode.c:896 [inline]
 ocfs2_delete_inode fs/ocfs2/inode.c:1157 [inline]
 ocfs2_evict_inode+0x1539/0x42c0 fs/ocfs2/inode.c:1299
 evict+0x61e/0xb10 fs/inode.c:837
 d_delete_notify include/linux/fsnotify.h:377 [inline]
 vfs_rmdir+0x3f7/0x670 fs/namei.c:5258
 do_rmdir+0x278/0x470 fs/namei.c:5300
 __do_sys_rmdir fs/namei.c:5324 [inline]
 __se_sys_rmdir fs/namei.c:5322 [inline]
 __x64_sys_rmdir+0x47/0x50 fs/namei.c:5322
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f875fd5aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f875df95028 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f875ffd6090 RCX: 00007f875fd5aeb9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f875fdc8c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f875ffd6128 R14: 00007f875ffd6090 R15: 00007ffceae47658
 </TASK>