Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k IPVS: ftp: loaded support on port[0] = 21 ============================================ WARNING: possible recursive locking detected 4.19.0-syzkaller #0 Not tainted -------------------------------------------- syz-executor.0/3855 is trying to acquire lock: 000000009b2f2948 (&tree->tree_lock){+.+.}, at: hfs_find_init+0x4b/0x60 fs/hfs/bfind.c:28 but task is already holding lock: 00000000473ee1ac (&tree->tree_lock){+.+.}, at: hfs_find_init+0x4b/0x60 fs/hfs/bfind.c:28 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&tree->tree_lock); lock(&tree->tree_lock); *** DEADLOCK *** May be due to missing lock nesting notation 4 locks held by syz-executor.0/3855: #0: 00000000d52b63a4 (sb_writers#13){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline] #0: 00000000d52b63a4 (sb_writers#13){.+.+}, at: mnt_want_write+0x1f/0x50 fs/namespace.c:360 #1: 00000000bb820443 (&type->i_mutex_dir_key#8){+.+.}, at: inode_lock include/linux/fs.h:757 [inline] #1: 00000000bb820443 (&type->i_mutex_dir_key#8){+.+.}, at: do_last fs/namei.c:3321 [inline] #1: 00000000bb820443 (&type->i_mutex_dir_key#8){+.+.}, at: path_openat+0x4e8/0xc00 fs/namei.c:3534 #2: 00000000473ee1ac (&tree->tree_lock){+.+.}, at: hfs_find_init+0x4b/0x60 fs/hfs/bfind.c:28 #3: 00000000b034de39 (&HFS_I(tree->inode)->extents_lock){+.+.}, at: hfs_extend_file+0x40/0x280 fs/hfs/extent.c:395 stack backtrace: CPU: 1 PID: 3855 Comm: syz-executor.0 Not tainted 4.19.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x70/0x9a lib/dump_stack.c:113 print_deadlock_bug kernel/locking/lockdep.c:1761 [inline] check_deadlock kernel/locking/lockdep.c:1805 [inline] validate_chain kernel/locking/lockdep.c:2331 [inline] __lock_acquire.cold.42+0xc5/0x285 kernel/locking/lockdep.c:3341 lock_acquire+0x99/0x180 kernel/locking/lockdep.c:3844 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x6f/0x7b0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 hfs_find_init+0x4b/0x60 fs/hfs/bfind.c:28 hfs_ext_read_extent+0x59/0x1a0 fs/hfs/extent.c:200 hfs_extend_file+0x170/0x280 fs/hfs/extent.c:399 hfs_bmap_reserve+0x7b/0x90 fs/hfs/btree.c:231 hfs_cat_create+0x9c/0x2e0 fs/hfs/catalog.c:104 hfs_create+0x39/0x90 fs/hfs/dir.c:202 lookup_open+0x2be/0x8a0 fs/namei.c:3234 do_last fs/namei.c:3324 [inline] path_openat+0x4fe/0xc00 fs/namei.c:3534 do_filp_open+0x8e/0x100 fs/namei.c:3564 do_sys_open+0x17d/0x210 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x1b/0x20 fs/open.c:1084 do_syscall_64+0x54/0x160 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f33b2e38ce9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f33b29bb0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f33b2f57f80 RCX: 00007f33b2e38ce9 RDX: 000000000000275a RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 00007f33b2e8547a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 00007f33b2f57f80 R15: 00007ffd1d2bd6d8 hfs: request for non-existent node 16777216 in B*Tree hfs: request for non-existent node 16777216 in B*Tree hfs: inconsistency in B*Tree (5,0,1,0,1) hfs: request for non-existent node 16777216 in B*Tree hfs: request for non-existent node 16777216 in B*Tree hfs: inconsistency in B*Tree (5,0,1,0,1)