hfsplus: xattr searching failed ============================================ WARNING: possible recursive locking detected 4.19.211-syzkaller #0 Not tainted -------------------------------------------- syz-executor293/8072 is trying to acquire lock: 000000002345367d (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260 but task is already holding lock: 000000005ad27fe3 (&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 4 locks held by syz-executor293/8072: #0: 00000000bca0d5fc (sb_writers#11){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000bca0d5fc (sb_writers#11){.+.+}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:360 #1: 0000000078f46c11 (&sb->s_type->i_mutex_key#17){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 0000000078f46c11 (&sb->s_type->i_mutex_key#17){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 000000005ad27fe3 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_truncate+0x1e2/0x1040 fs/hfsplus/extents.c:576 #3: 00000000c81062c5 (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_free+0xdb/0x5d0 fs/hfsplus/bitmap.c:182 stack backtrace: CPU: 0 PID: 8072 Comm: syz-executor293 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_setattr+0x1e7/0x310 fs/hfsplus/inode.c:263 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7faa0cf3e789 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:00007ffc19f1d098 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007faa0cf3e789 RDX: 00007faa0cefce03 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00007faa0cefe020 R08: 00000000000005e1 R09: 0000000000000000 R10: 00007ffc19f1cf60 R11: 0000000000000246 R12: 00007faa0cefe0b0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 hfsplus: unable to mark blocks free: error -5 hfsplus: can't fre