====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.4.201/6814 is trying to acquire lock: ffff888051465f40 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] ffff888051465f40 (&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: ffff888051465100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] ffff888051465100 (&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 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d3/0x11d0 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 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_create+0x17c/0x460 fs/ocfs2/namei.c:676 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796 open_last_lookups fs/namei.c:3895 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4131 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 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_create+0x17c/0x460 fs/ocfs2/namei.c:676 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3796 open_last_lookups fs/namei.c:3895 [inline] path_openat+0x893/0x2cb0 fs/namei.c:4131 do_filp_open+0x20b/0x470 fs/namei.c:4161 do_sys_openat2+0x11b/0x1d0 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1463 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 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x282/0x480 fs/dcache.c:464 __dentry_kill+0x1d0/0x600 fs/dcache.c:669 dput.part.0+0x4b1/0x9b0 fs/dcache.c:911 dput+0x1f/0x30 fs/dcache.c:901 __fput+0x51c/0xb70 fs/file_table.c:476 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100 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 *** 2 locks held by syz.4.201/6814: #0: ffff8880777dcbd0 (&osb->nfs_sync_rwlock){.+.+}-{4:4}, at: ocfs2_nfs_sync_lock+0xe4/0x2e0 fs/ocfs2/dlmglue.c:2875 #1: ffff888051465100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #1: ffff888051465100 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_wipe_inode+0x2d5/0x1210 fs/ocfs2/inode.c:852 stack backtrace: CPU: 1 UID: 0 PID: 6814 Comm: syz.4.201 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: __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 ocfs2_dentry_iput+0x139/0x330 fs/ocfs2/dcache.c:407 dentry_unlink_inode+0x282/0x480 fs/dcache.c:464 __dentry_kill+0x1d0/0x600 fs/dcache.c:669 dput.part.0+0x4b1/0x9b0 fs/dcache.c:911 dput+0x1f/0x30 fs/dcache.c:901 __fput+0x51c/0xb70 fs/file_table.c:476 task_work_run+0x150/0x240 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f912878efc9 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:00007ffe5b667498 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007f91289e7da0 RCX: 00007f912878efc9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007f91289e7da0 R08: 0000000000006708 R09: 000000165b66778f R10: 00007f91289e7cb0 R11: 0000000000000246 R12: 000000000003b3dc R13: 00007f91289e6270 R14: ffffffffffffffff R15: 00007ffe5b6675b0