====================================================== WARNING: possible circular locking dependency detected 6.6.102-syzkaller #0 Not tainted ------------------------------------------------------ syz.1.155/6757 is trying to acquire lock: ffff88805cf0d118 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] ffff88805cf0d118 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}, at: ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 but task is already holding lock: ffff88805cf0bf60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] ffff88805cf0bf60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x38c/0x10f0 fs/ocfs2/aops.c:2431 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x1a4/0x1790 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x7cf/0xaf0 fs/ocfs2/quota_global.c:871 dqget+0x77c/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3ba/0xcb0 fs/quota/dquot.c:1516 ocfs2_get_init_inode+0x13c/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x20f0 fs/ocfs2/namei.c:310 ocfs2_create+0x196/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_open fs/open.c:1442 [inline] __se_sys_open fs/open.c:1438 [inline] __x64_sys_open+0x11f/0x140 fs/open.c:1438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x129/0xcc0 kernel/locking/mutex.c:747 wait_on_dquot fs/quota/dquot.c:356 [inline] dqget+0x6fc/0xeb0 fs/quota/dquot.c:983 __dquot_initialize+0x3ba/0xcb0 fs/quota/dquot.c:1516 ocfs2_get_init_inode+0x13c/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x867/0x20f0 fs/ocfs2/namei.c:310 ocfs2_create+0x196/0x410 fs/ocfs2/namei.c:674 lookup_open fs/namei.c:3488 [inline] open_last_lookups fs/namei.c:3556 [inline] path_openat+0x1277/0x3190 fs/namei.c:3786 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419 do_sys_open fs/open.c:1434 [inline] __do_sys_open fs/open.c:1442 [inline] __se_sys_open fs/open.c:1438 [inline] __x64_sys_open+0x11f/0x140 fs/open.c:1438 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}: down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [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+0x1313/0x3e60 fs/ocfs2/inode.c:1216 evict+0x486/0x870 fs/inode.c:705 ocfs2_dentry_iput+0x248/0x370 fs/ocfs2/dcache.c:418 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 ovl_check_rename_whiteout fs/overlayfs/super.c:652 [inline] ovl_make_workdir fs/overlayfs/super.c:751 [inline] ovl_get_workdir+0xa6a/0x1740 fs/overlayfs/super.c:874 ovl_fill_super+0x1345/0x3560 fs/overlayfs/super.c:1427 vfs_get_super fs/super.c:1346 [inline] get_tree_nodev+0xb5/0x140 fs/super.c:1365 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3371 do_mount fs/namespace.c:3711 [inline] __do_sys_mount fs/namespace.c:3920 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3897 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x47b/0x10f0 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2dc8/0x3420 fs/direct-io.c:1308 ocfs2_direct_IO+0x240/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3941 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4097 ocfs2_file_write_iter+0x1582/0x1d00 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x79a/0xc70 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_pwritev+0x205/0x340 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type] --> &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[args->fi_sysfile_type]); *** DEADLOCK *** 3 locks held by syz.1.155/6757: #0: ffff888059e16418 (sb_writers#14){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:932 [inline] #0: ffff888059e16418 (sb_writers#14){.+.+}-{0:0}, at: do_pwritev+0x1f3/0x340 fs/read_write.c:1030 #1: ffff88805cf0c2d8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline] #1: ffff88805cf0c2d8 (&sb->s_type->i_mutex_key#24){++++}-{3:3}, at: ocfs2_file_write_iter+0x40b/0x1d00 fs/ocfs2/file.c:2398 #2: ffff88805cf0bf60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2325 [inline] #2: ffff88805cf0bf60 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_dio_end_io+0x38c/0x10f0 fs/ocfs2/aops.c:2431 stack backtrace: CPU: 1 PID: 6757 Comm: syz.1.155 Not tainted 6.6.102-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 check_noncircular+0x2bd/0x3c0 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2ddb/0x7c80 kernel/locking/lockdep.c:5137 lock_acquire+0x197/0x410 kernel/locking/lockdep.c:5754 down_write+0x97/0x1f0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:804 [inline] ocfs2_del_inode_from_orphan+0x135/0x740 fs/ocfs2/namei.c:2716 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2333 [inline] ocfs2_dio_end_io+0x47b/0x10f0 fs/ocfs2/aops.c:2431 dio_complete+0x254/0x710 fs/direct-io.c:282 __blockdev_direct_IO+0x2dc8/0x3420 fs/direct-io.c:1308 ocfs2_direct_IO+0x240/0x2b0 fs/ocfs2/aops.c:2468 generic_file_direct_write+0x1d4/0x3e0 mm/filemap.c:3941 __generic_file_write_iter+0x11b/0x230 mm/filemap.c:4097 ocfs2_file_write_iter+0x1582/0x1d00 fs/ocfs2/file.c:2468 do_iter_readv_writev fs/read_write.c:-1 [inline] do_iter_write+0x79a/0xc70 fs/read_write.c:860 vfs_writev fs/read_write.c:933 [inline] do_pwritev+0x205/0x340 fs/read_write.c:1030 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fe68ed8ebe9 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:00007fe68fc29038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fe68efb5fa0 RCX: 00007fe68ed8ebe9 RDX: 0000000000000001 RSI: 0000200000000240 RDI: 0000000000000004 RBP: 00007fe68ee11e19 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000007000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe68efb6038 R14: 00007fe68efb5fa0 R15: 00007ffda5333448