(syz-executor.3,12658,0):user_dlm_register:695 ERROR: status = -22 (syz-executor.3,12658,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file2" overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. ====================================================== WARNING: possible circular locking dependency detected 4.14.295-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.0/12666 is trying to acquire lock: (&ovl_i_mutex_dir_key[depth]){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] (&ovl_i_mutex_dir_key[depth]){++++}, at: [] lookup_slow+0x129/0x400 fs/namei.c:1674 but task is already holding lock: (&oi->lock){+.+.}, at: [] ovl_nlink_start+0x22f/0x460 fs/overlayfs/util.c:523 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&oi->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 ovl_copy_up_start+0x40/0xe0 fs/overlayfs/util.c:318 ovl_copy_up_one+0x21f/0x910 fs/overlayfs/copy_up.c:631 ovl_copy_up_flags+0xd5/0x120 fs/overlayfs/copy_up.c:686 ovl_rename+0x164/0xe50 fs/overlayfs/dir.c:939 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (sb_writers#3){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1551 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_create_object+0x75/0x1d0 fs/overlayfs/dir.c:538 lookup_open+0x77a/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&ovl_i_mutex_dir_key[depth]){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] lookup_slow+0x129/0x400 fs/namei.c:1674 lookup_one_len_unlocked+0x3a0/0x410 fs/namei.c:2595 ovl_lower_positive+0x184/0x350 fs/overlayfs/namei.c:783 ovl_rename+0x47c/0xe50 fs/overlayfs/dir.c:968 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_key[depth] --> sb_writers#3 --> &oi->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->lock); lock(sb_writers#3); lock(&oi->lock); lock(&ovl_i_mutex_dir_key[depth]); *** DEADLOCK *** 8 locks held by syz-executor.0/12666: #0: (sb_writers#14){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #0: (sb_writers#14){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #1: (&type->s_vfs_rename_key#2){+.+.}, at: [] lock_rename+0x54/0x280 fs/namei.c:2889 #2: (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #2: (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [] lock_rename+0xa0/0x280 fs/namei.c:2893 #3: (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #3: (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [] lock_rename+0xd4/0x280 fs/namei.c:2894 #4: (&ovl_i_mutex_key[depth]){+.+.}, at: [] inode_lock include/linux/fs.h:719 [inline] #4: (&ovl_i_mutex_key[depth]){+.+.}, at: [] lock_two_nondirectories+0xca/0xf0 fs/inode.c:990 #5: (&ovl_i_mutex_key[depth]/4){+.+.}, at: [] inode_lock_nested include/linux/fs.h:754 [inline] #5: (&ovl_i_mutex_key[depth]/4){+.+.}, at: [] lock_two_nondirectories+0xb2/0xf0 fs/inode.c:992 #6: (sb_writers#3){.+.+}, at: [] sb_start_write include/linux/fs.h:1551 [inline] #6: (sb_writers#3){.+.+}, at: [] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 #7: (&oi->lock){+.+.}, at: [] ovl_nlink_start+0x22f/0x460 fs/overlayfs/util.c:523 stack backtrace: CPU: 0 PID: 12666 Comm: syz-executor.0 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] lookup_slow+0x129/0x400 fs/namei.c:1674 lookup_one_len_unlocked+0x3a0/0x410 fs/namei.c:2595 ovl_lower_positive+0x184/0x350 fs/overlayfs/namei.c:783 ovl_rename+0x47c/0xe50 fs/overlayfs/dir.c:968 vfs_rename+0x560/0x1820 fs/namei.c:4498 SYSC_renameat2 fs/namei.c:4646 [inline] SyS_renameat2+0x95b/0xad0 fs/namei.c:4535 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fa2faf9e5a9 RSP: 002b:00007fa2f9511168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 00007fa2fb0bef80 RCX: 00007fa2faf9e5a9 RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000020000380 RBP: 00007fa2faff97b0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf809167f R14: 00007fa2f9511300 R15: 0000000000022000 ip_tables: iptables: counters copy to user failed while replacing table o2cb: This node has not been configured. o2cb: Cluster check failed. Fix errors before retrying. BFS-fs: bfs_fill_super(): loop5 is unclean, continuing (syz-executor.2,12680,0):user_dlm_register:695 ERROR: status = -22 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. (syz-executor.2,12680,0):dlmfs_mkdir:497 ERROR: Error -22 could not register domain "file2" ip_tables: iptables: counters copy to user failed while replacing table overlayfs: fs on './file0' does not support file handles, falling back to index=off. ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table BFS-fs: bfs_fill_super(): loop5 is unclean, continuing ip_tables: iptables: counters copy to user failed while replacing table overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. ip_tables: iptables: counters copy to user failed while replacing table BFS-fs: bfs_fill_super(): loop5 is unclean, continuing overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. BFS-fs: bfs_fill_super(): loop5 is unclean, continuing device veth1_macvtap left promiscuous mode audit: type=1800 audit(1666748253.873:68): pid=12801 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file1" dev="sda1" ino=14207 res=0 audit: type=1800 audit(1666748255.413:69): pid=12853 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14255 res=0 audit: type=1800 audit(1666748255.463:70): pid=12856 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file1" dev="sda1" ino=14256 res=0 audit: type=1800 audit(1666748257.154:71): pid=12897 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file1" dev="sda1" ino=14272 res=0 audit: type=1800 audit(1666748257.244:72): pid=12898 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file1" dev="sda1" ino=14273 res=0 audit: type=1800 audit(1666748257.314:73): pid=12894 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14257 res=0 audit: type=1800 audit(1666748259.064:74): pid=12935 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="file1" dev="sda1" ino=14277 res=0 audit: type=1800 audit(1666748259.114:75): pid=12938 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file1" dev="sda1" ino=14278 res=0 audit: type=1800 audit(1666748259.114:76): pid=12940 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14279 res=0 EXT4-fs (loop4): unsupported inode size: 0 EXT4-fs (loop4): blocksize: 1024 print_req_error: I/O error, dev loop4, sector 0 Buffer I/O error on dev loop4, logical block 0, async page read print_req_error: I/O error, dev loop4, sector 4 Buffer I/O error on dev loop4, logical block 2, async page read print_req_error: I/O error, dev loop4, sector 6 Buffer I/O error on dev loop4, logical block 3, async page read EXT4-fs (loop4): unsupported inode size: 0 EXT4-fs (loop4): blocksize: 1024 audit: type=1800 audit(1666748259.344:77): pid=12980 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14283 res=0 audit: type=1800 audit(1666748259.574:78): pid=12992 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file1" dev="sda1" ino=14278 res=0 audit: type=1800 audit(1666748259.734:79): pid=13008 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14279 res=0 EXT4-fs (loop4): unsupported inode size: 0 EXT4-fs (loop4): blocksize: 1024 EXT4-fs (loop4): unsupported inode size: 0 EXT4-fs (loop4): blocksize: 1024 audit: type=1800 audit(1666748260.204:80): pid=13049 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file1" dev="sda1" ino=14279 res=0 audit: type=1800 audit(1666748260.394:81): pid=13073 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file1" dev="sda1" ino=14296 res=0 audit: type=1800 audit(1666748260.464:82): pid=13085 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file1" dev="sda1" ino=14294 res=0 audit: type=1800 audit(1666748260.624:83): pid=13105 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file1" dev="sda1" ino=14302 res=0