============================================ WARNING: possible recursive locking detected 4.19.211-syzkaller #0 Not tainted -------------------------------------------- syz-executor304/8112 is trying to acquire lock: 0000000034b146a4 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 but task is already holding lock: 00000000b61bf66b (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&HFSPLUS_I(inode)->extents_lock); lock(&HFSPLUS_I(inode)->extents_lock); *** DEADLOCK *** May be due to missing lock nesting notation 7 locks held by syz-executor304/8112: #0: 00000000c8761763 (sb_writers#11){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000c8761763 (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 0000000075aaa9ef (&type->i_mutex_dir_key#7/1){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #1: 0000000075aaa9ef (&type->i_mutex_dir_key#7/1){+.+.}, at: lock_rename+0x225/0x280 fs/namei.c:2863 #2: 00000000915ba412 (&sb->s_type->i_mutex_key#18){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #2: 00000000915ba412 (&sb->s_type->i_mutex_key#18){+.+.}, at: lock_two_nondirectories+0xec/0x110 fs/inode.c:1015 #3: 000000003d18756e (&sb->s_type->i_mutex_key#17/4){+.+.}, at: inode_lock_nested include/linux/fs.h:783 [inline] #3: 000000003d18756e (&sb->s_type->i_mutex_key#17/4){+.+.}, at: lock_two_nondirectories+0xd1/0x110 fs/inode.c:1017 #4: 000000009d8a3937 (&sbi->vh_mutex){+.+.}, at: hfsplus_unlink+0x140/0x820 fs/hfsplus/dir.c:370 #5: 00000000b61bf66b (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 #6: 00000000e6578e34 (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 1 PID: 8112 Comm: syz-executor304 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_deadlock_bug kernel/locking/lockdep.c:1764 [inline] check_deadlock kernel/locking/lockdep.c:1808 [inline] validate_chain kernel/locking/lockdep.c:2404 [inline] __lock_acquire.cold+0x121/0x57e kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 block_read_full_page+0x288/0xd10 fs/buffer.c:2259 do_read_cache_page+0x533/0x1170 mm/filemap.c:2828 read_mapping_page include/linux/pagemap.h:402 [inline] hfsplus_block_free+0x18b/0x5d0 fs/hfsplus/bitmap.c:185 hfsplus_free_extents+0x228/0x520 fs/hfsplus/extents.c:363 hfsplus_file_truncate+0xd96/0x1040 fs/hfsplus/extents.c:591 hfsplus_delete_inode+0x18d/0x220 fs/hfsplus/inode.c:419 hfsplus_unlink+0x595/0x820 fs/hfsplus/dir.c:405 hfsplus_rename+0xbe/0x200 fs/hfsplus/dir.c:545 vfs_rename+0x67e/0x1bc0 fs/namei.c:4479 do_renameat2+0xb59/0xc70 fs/namei.c:4629 __do_sys_renameat2 fs/namei.c:4664 [inline] __se_sys_renameat2 fs/namei.c:4661 [inline] __x64_sys_renameat2+0xba/0x150 fs/namei.c:4661 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7feac8ef1b89 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc2a503dc8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007feac8ef1b89 RDX: 0000000000000005 RSI: 00000000200001c0 RDI: 0000000000000005 RBP: 00007feac8eb1190 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000200 R11: 0000000000000246 R12: 00007feac8eb1220 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 hfsplus: request for non-existent node 31668 in B*Tree hfsplus: request for non-existent node 31668 in B*Tree hfsplus: request for non-existent node 31668 in B*Tree hfsplus: