====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.1251/11036 is trying to acquire lock: ffff8880592fb480 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] ffff8880592fb480 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 but task is already holding lock: ffff8880313bea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2298 [inline] ffff8880313bea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x389/0x10f0 fs/ocfs2/aops.c:2404 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:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 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:980 dquot_set_dqblk+0x2b/0xfa0 fs/quota/dquot.c:2823 quota_setquota+0x4b7/0x540 fs/quota/quota.c:310 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl+0x279/0x950 fs/quota/quota.c:917 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 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:5868 __mutex_lock_common kernel/locking/mutex.c:598 [inline] __mutex_lock+0x187/0x1350 kernel/locking/mutex.c:760 wait_on_dquot fs/quota/dquot.c:357 [inline] dqget+0x72a/0xf10 fs/quota/dquot.c:975 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:313 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3716 [inline] open_last_lookups fs/namei.c:3815 [inline] path_openat+0x14f4/0x3830 fs/namei.c:4051 do_filp_open+0x1fa/0x410 fs/namei.c:4081 do_sys_openat2+0x121/0x1c0 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+0x138/0x170 fs/open.c:1463 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:980 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:731 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x153d/0x4100 fs/ocfs2/inode.c:1295 evict+0x504/0x9c0 fs/inode.c:810 ocfs2_dentry_iput+0x247/0x370 fs/ocfs2/dcache.c:407 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 ovl_check_rename_whiteout fs/overlayfs/super.c:619 [inline] ovl_make_workdir fs/overlayfs/super.c:714 [inline] ovl_get_workdir+0xad2/0x17c0 fs/overlayfs/super.c:837 ovl_fill_super+0x154a/0x3da0 fs/overlayfs/super.c:1468 vfs_get_super fs/super.c:1324 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1343 vfs_get_tree+0x92/0x2b0 fs/super.c:1751 fc_mount fs/namespace.c:1208 [inline] do_new_mount_fc fs/namespace.c:3651 [inline] do_new_mount+0x302/0x9e0 fs/namespace.c:3725 do_mount fs/namespace.c:4048 [inline] __do_sys_mount fs/namespace.c:4237 [inline] __se_sys_mount+0x313/0x410 fs/namespace.c:4214 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:980 [inline] ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline] ocfs2_dio_end_io+0x479/0x10f0 fs/ocfs2/aops.c:2404 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2e63/0x3490 fs/direct-io.c:1303 ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4143 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4312 ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469 aio_write+0x535/0x7a0 fs/aio.c:1634 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x78b/0x1310 fs/aio.c:2053 __do_sys_io_submit fs/aio.c:2112 [inline] __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/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[ORPHAN_DIR_SYSTEM_INODE] --> &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[ORPHAN_DIR_SYSTEM_INODE]); *** DEADLOCK *** 2 locks held by syz.0.1251/11036: #0: ffff8880313bed80 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: inode_lock include/linux/fs.h:980 [inline] #0: ffff8880313bed80 (&sb->s_type->i_mutex_key#25){++++}-{4:4}, at: ocfs2_file_write_iter+0x429/0x1d10 fs/ocfs2/file.c:2399 #1: ffff8880313bea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2298 [inline] #1: ffff8880313bea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x389/0x10f0 fs/ocfs2/aops.c:2404 stack backtrace: CPU: 1 UID: 0 PID: 11036 Comm: syz.0.1251 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x96/0x1f0 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:980 [inline] ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline] ocfs2_dio_end_io+0x479/0x10f0 fs/ocfs2/aops.c:2404 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2e63/0x3490 fs/direct-io.c:1303 ocfs2_direct_IO+0x25f/0x2d0 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4143 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4312 ocfs2_file_write_iter+0x157a/0x1d10 fs/ocfs2/file.c:2469 aio_write+0x535/0x7a0 fs/aio.c:1634 __io_submit_one fs/aio.c:-1 [inline] io_submit_one+0x78b/0x1310 fs/aio.c:2053 __do_sys_io_submit fs/aio.c:2112 [inline] __se_sys_io_submit+0x185/0x2f0 fs/aio.c:2082 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f08d698eec9 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:00007f08d7883038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d1 RAX: ffffffffffffffda RBX: 00007f08d6be6090 RCX: 00007f08d698eec9 RDX: 0000200000000540 RSI: 000000000000003b RDI: 00007f08d785a000 RBP: 00007f08d6a11f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f08d6be6128 R14: 00007f08d6be6090 R15: 00007ffe6529be58