syzbot

======================================================
WARNING: possible circular locking dependency detected
6.12.0-rc2-syzkaller-00205-g1d227fcc7222 #0 Not tainted
------------------------------------------------------
syz.4.354/8388 is trying to acquire lock:
ffff88807ecb89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
ffff88807ecb89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_remove_inode fs/ocfs2/inode.c:655 [inline]
ffff88807ecb89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:818 [inline]
ffff88807ecb89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ffff88807ecb89c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_evict_inode+0x209f/0x4680 fs/ocfs2/inode.c:1216

but task is already holding lock:
ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline]
ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:815 [inline]
       ocfs2_del_inode_from_orphan+0x159/0x800 fs/ocfs2/namei.c:2726
       ocfs2_dio_end_io_write fs/ocfs2/aops.c:2329 [inline]
       ocfs2_dio_end_io+0x55b/0x1250 fs/ocfs2/aops.c:2427
       dio_complete+0x251/0x6b0 fs/direct-io.c:281
       __blockdev_direct_IO+0x3ebd/0x4890 fs/direct-io.c:1303
       ocfs2_direct_IO+0x255/0x2c0 fs/ocfs2/aops.c:2464
       generic_file_direct_write+0x17a/0x390 mm/filemap.c:3977
       __generic_file_write_iter+0x126/0x230 mm/filemap.c:4141
       ocfs2_file_write_iter+0x17b1/0x1f50 fs/ocfs2/file.c:2456
       do_iter_readv_writev+0x600/0x880
       vfs_writev+0x376/0xba0 fs/read_write.c:1064
       do_pwritev fs/read_write.c:1165 [inline]
       __do_sys_pwritev2 fs/read_write.c:1224 [inline]
       __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       ocfs2_create_local_dquot+0x1de/0x1d70 fs/ocfs2/quota_local.c:1231
       ocfs2_acquire_dquot+0x833/0xb80 fs/ocfs2/quota_global.c:878
       dqget+0x770/0xeb0 fs/quota/dquot.c:976
       __dquot_initialize+0x2e3/0xec0 fs/quota/dquot.c:1504
       ocfs2_get_init_inode+0x158/0x1c0 fs/ocfs2/namei.c:202
       ocfs2_symlink+0xdbc/0x2d90 fs/ocfs2/namei.c:1886
       vfs_symlink+0x137/0x2e0 fs/namei.c:4615
       do_symlinkat+0x222/0x3a0 fs/namei.c:4641
       __do_sys_symlinkat fs/namei.c:4657 [inline]
       __se_sys_symlinkat fs/namei.c:4654 [inline]
       __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4654
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&dquot->dq_lock){+.+.}-{3:3}:
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       __mutex_lock_common kernel/locking/mutex.c:608 [inline]
       __mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
       wait_on_dquot fs/quota/dquot.c:355 [inline]
       dqget+0x6e6/0xeb0 fs/quota/dquot.c:971
       __dquot_initialize+0x2e3/0xec0 fs/quota/dquot.c:1504
       ocfs2_get_init_inode+0x158/0x1c0 fs/ocfs2/namei.c:202
       ocfs2_symlink+0xdbc/0x2d90 fs/ocfs2/namei.c:1886
       vfs_symlink+0x137/0x2e0 fs/namei.c:4615
       do_symlinkat+0x222/0x3a0 fs/namei.c:4641
       __do_sys_symlinkat fs/namei.c:4657 [inline]
       __se_sys_symlinkat fs/namei.c:4654 [inline]
       __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4654
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3161 [inline]
       check_prevs_add kernel/locking/lockdep.c:3280 [inline]
       validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
       __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
       lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
       down_write+0x99/0x220 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:815 [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+0x209f/0x4680 fs/ocfs2/inode.c:1216
       evict+0x4e8/0x9b0 fs/inode.c:725
       do_unlinkat+0x512/0x830 fs/namei.c:4540
       __do_sys_unlink fs/namei.c:4581 [inline]
       __se_sys_unlink fs/namei.c:4579 [inline]
       __x64_sys_unlink+0x47/0x50 fs/namei.c:4579
       do_syscall_x64 arch/x86/entry/common.c:52 [inline]
       do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
       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]#4 --> &ocfs2_quota_ip_alloc_sem_key --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2);
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);

 *** DEADLOCK ***

3 locks held by syz.4.354/8388:
 #0: ffff8880334f0420 (sb_writers#30){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
 #1: ffff8880313bcbd0 (&osb->nfs_sync_rwlock){.+.+}-{3:3}, at: ocfs2_nfs_sync_lock+0x109/0x260 fs/ocfs2/dlmglue.c:2876
 #2: ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
 #2: ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_wipe_inode fs/ocfs2/inode.c:776 [inline]
 #2: ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_delete_inode fs/ocfs2/inode.c:1079 [inline]
 #2: ffff888061ff9800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_evict_inode+0x1b17/0x4680 fs/ocfs2/inode.c:1216

stack backtrace:
CPU: 1 UID: 0 PID: 8388 Comm: syz.4.354 Not tainted 6.12.0-rc2-syzkaller-00205-g1d227fcc7222 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_circular_bug+0x13a/0x1b0 kernel/locking/lockdep.c:2074
 check_noncircular+0x36a/0x4a0 kernel/locking/lockdep.c:2206
 check_prev_add kernel/locking/lockdep.c:3161 [inline]
 check_prevs_add kernel/locking/lockdep.c:3280 [inline]
 validate_chain+0x18ef/0x5920 kernel/locking/lockdep.c:3904
 __lock_acquire+0x1384/0x2050 kernel/locking/lockdep.c:5202
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
 down_write+0x99/0x220 kernel/locking/rwsem.c:1577
 inode_lock include/linux/fs.h:815 [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+0x209f/0x4680 fs/ocfs2/inode.c:1216
 evict+0x4e8/0x9b0 fs/inode.c:725
 do_unlinkat+0x512/0x830 fs/namei.c:4540
 __do_sys_unlink fs/namei.c:4581 [inline]
 __se_sys_unlink fs/namei.c:4579 [inline]
 __x64_sys_unlink+0x47/0x50 fs/namei.c:4579
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa9a7b7dff9
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:00007fa9a89eb038 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fa9a7d35f80 RCX: 00007fa9a7b7dff9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007fa9a7bf0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa9a7d35f80 R15: 00007fffb054ddb8
 </TASK>
ocfs2: Unmounting device (7,4) on (node local)