syzbot

loop3: detected capacity change from 0 to 32768
ocfs2: Mounting device (7,3) on (node local, slot 0) with writeback data mode.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.1944/19080 is trying to acquire lock:
ffff888050995100 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
ffff888050995100 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:731

but task is already holding lock:
ffff8880509909c0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
ffff8880509909c0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2d5/0x1210 fs/ocfs2/inode.c:852

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+0x92/0x200 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:980 [inline]
       ocfs2_del_inode_from_orphan+0x112/0x700 fs/ocfs2/namei.c:2730
       ocfs2_dio_end_io_write+0x2cb/0xf30 fs/ocfs2/aops.c:2306
       ocfs2_dio_end_io+0x136/0x2c0 fs/ocfs2/aops.c:2404
       dio_complete+0x224/0x970 fs/direct-io.c:281
       __blockdev_direct_IO+0x3027/0x3c40 fs/direct-io.c:1303
       ocfs2_direct_IO+0x263/0x360 fs/ocfs2/aops.c:2441
       generic_file_direct_write+0x19a/0x410 mm/filemap.c:4176
       __generic_file_write_iter+0x11b/0x240 mm/filemap.c:4345
       ocfs2_file_write_iter+0xbc4/0x21b0 fs/ocfs2/file.c:2469
       iter_file_splice_write+0xa24/0x12e0 fs/splice.c:738
       do_splice_from fs/splice.c:938 [inline]
       direct_splice_actor+0x192/0x6c0 fs/splice.c:1161
       splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105
       do_splice_direct_actor fs/splice.c:1204 [inline]
       do_splice_direct+0x174/0x240 fs/splice.c:1230
       do_sendfile+0xb06/0xe50 fs/read_write.c:1370
       __do_sys_sendfile64 fs/read_write.c:1431 [inline]
       __se_sys_sendfile64 fs/read_write.c:1417 [inline]
       __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xfa0 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+0x92/0x200 kernel/locking/rwsem.c:1590
       ocfs2_create_local_dquot+0x157/0xb30 fs/ocfs2/quota_local.c:1227
       ocfs2_acquire_dquot+0x626/0xb00 fs/ocfs2/quota_global.c:883
       dqget+0x693/0x1180 fs/quota/dquot.c:980
       __dquot_initialize+0x586/0xd50 fs/quota/dquot.c:1508
       ocfs2_get_init_inode+0xe7/0x1b0 fs/ocfs2/namei.c:205
       ocfs2_mknod+0x974/0x2540 fs/ocfs2/namei.c:313
       ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659
       vfs_mkdir+0x593/0x8c0 fs/namei.c:4453
       do_mkdirat+0x304/0x3e0 fs/namei.c:4486
       __do_sys_mkdirat fs/namei.c:4503 [inline]
       __se_sys_mkdirat fs/namei.c:4501 [inline]
       __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4501
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xfa0 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/mutex.c:598 [inline]
       __mutex_lock+0x193/0x1060 kernel/locking/mutex.c:760
       wait_on_dquot fs/quota/dquot.c:357 [inline]
       dqget+0x5f1/0x1180 fs/quota/dquot.c:975
       __dquot_initialize+0x586/0xd50 fs/quota/dquot.c:1508
       ocfs2_get_init_inode+0xe7/0x1b0 fs/ocfs2/namei.c:205
       ocfs2_mknod+0x974/0x2540 fs/ocfs2/namei.c:313
       ocfs2_mkdir+0x17c/0x490 fs/ocfs2/namei.c:659
       vfs_mkdir+0x593/0x8c0 fs/namei.c:4453
       do_mkdirat+0x304/0x3e0 fs/namei.c:4486
       __do_sys_mkdirat fs/namei.c:4503 [inline]
       __se_sys_mkdirat fs/namei.c:4501 [inline]
       __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:4501
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xfa0 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+0x126f/0x1c90 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
       down_write+0x92/0x200 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:980 [inline]
       ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:731
       ocfs2_wipe_inode+0x446/0x1210 fs/ocfs2/inode.c:894
       ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]
       ocfs2_evict_inode+0x6e0/0x1680 fs/ocfs2/inode.c:1295
       evict+0x3e6/0x920 fs/inode.c:810
       iput_final fs/inode.c:1914 [inline]
       iput.part.0+0x6a9/0xb00 fs/inode.c:1966
       iput+0x35/0x40 fs/inode.c:1929
       do_unlinkat+0x518/0x6a0 fs/namei.c:4744
       __do_sys_unlink fs/namei.c:4783 [inline]
       __se_sys_unlink fs/namei.c:4781 [inline]
       __x64_sys_unlink+0xc5/0x110 fs/namei.c:4781
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xcd/0xfa0 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 ***

3 locks held by syz.3.1944/19080:
 #0: ffff88804a9f4420 (sb_writers#16){.+.+}-{0:0}, at: do_unlinkat+0x1bd/0x6a0 fs/namei.c:4720
 #1: ffff888079724bd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0xe4/0x2e0 fs/ocfs2/dlmglue.c:2875
 #2: ffff8880509909c0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline]
 #2: ffff8880509909c0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2d5/0x1210 fs/ocfs2/inode.c:852

stack backtrace:
CPU: 0 UID: 0 PID: 19080 Comm: syz.3.1944 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_circular_bug+0x275/0x350 kernel/locking/lockdep.c:2043
 check_noncircular+0x14c/0x170 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+0x126f/0x1c90 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x179/0x350 kernel/locking/lockdep.c:5825
 down_write+0x92/0x200 kernel/locking/rwsem.c:1590
 inode_lock include/linux/fs.h:980 [inline]
 ocfs2_remove_inode+0x15b/0x8a0 fs/ocfs2/inode.c:731
 ocfs2_wipe_inode+0x446/0x1210 fs/ocfs2/inode.c:894
 ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline]
 ocfs2_evict_inode+0x6e0/0x1680 fs/ocfs2/inode.c:1295
 evict+0x3e6/0x920 fs/inode.c:810
 iput_final fs/inode.c:1914 [inline]
 iput.part.0+0x6a9/0xb00 fs/inode.c:1966
 iput+0x35/0x40 fs/inode.c:1929
 do_unlinkat+0x518/0x6a0 fs/namei.c:4744
 __do_sys_unlink fs/namei.c:4783 [inline]
 __se_sys_unlink fs/namei.c:4781 [inline]
 __x64_sys_unlink+0xc5/0x110 fs/namei.c:4781
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f54eab8efc9
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:00007f54eb964038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f54eade5fa0 RCX: 00007f54eab8efc9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000200
RBP: 00007f54eac11f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f54eade6038 R14: 00007f54eade5fa0 R15: 00007ffc299767d8
 </TASK>