====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== ============================================ WARNING: possible recursive locking detected 4.19.211-syzkaller #0 Not tainted -------------------------------------------- syz-executor237/8096 is trying to acquire lock: 00000000c332e86b (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 but task is already holding lock: 0000000086464514 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 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-executor237/8096: #0: 00000000bbc7cafe (sb_writers#11){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 00000000bbc7cafe (sb_writers#11){.+.+}, at: do_sys_ftruncate+0x297/0x560 fs/open.c:189 #1: 00000000ff4bafdd (&sb->s_type->i_mutex_key#17){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] #1: 00000000ff4bafdd (&sb->s_type->i_mutex_key#17){+.+.}, at: do_truncate+0x125/0x1f0 fs/open.c:61 #2: 0000000086464514 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 #3: 00000000f5e68561 (&tree->tree_lock/1){+.+.}, at: hfsplus_find_init+0x170/0x220 fs/hfsplus/bfind.c:33 stack backtrace: CPU: 0 PID: 8096 Comm: syz-executor237 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_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357 __hfsplus_ext_write_extent+0x45b/0x5a0 fs/hfsplus/extents.c:104 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline] hfsplus_ext_read_extent+0x910/0xab0 fs/hfsplus/extents.c:218 hfsplus_file_extend+0x672/0xf40 fs/hfsplus/extents.c:461 hfsplus_get_block+0x196/0x960 fs/hfsplus/extents.c:245 __block_write_begin_int+0x46c/0x17b0 fs/buffer.c:1978 __block_write_begin fs/buffer.c:2028 [inline] block_write_begin+0x58/0x2e0 fs/buffer.c:2087 cont_write_begin+0x55a/0x820 fs/buffer.c:2440 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52 cont_expand_zero fs/buffer.c:2367 [inline] cont_write_begin+0x2ee/0x820 fs/buffer.c:2430 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52 generic_cont_expand_simple+0x106/0x170 fs/buffer.c:2331 hfsplus_setattr+0x18b/0x310 fs/hfsplus/inode.c:257 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 do_sys_ftruncate+0x492/0x560 fs/open.c:194 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f159ab94799 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:00007fff6d5329f8 EFLAGS: 00000246 ORIG_RAX: 000000000000004d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f159ab94799 RDX: 0000000000000000 RSI: 0000000002007ffb RDI: 0000000000000004