hfsplus: xattr searching failed
hfsplus: xattr searching failed
============================================
WARNING: possible recursive locking detected
4.19.211-syzkaller #0 Not tainted
--------------------------------------------
syz-executor123/8098 is trying to acquire lock:
00000000870ea52c (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260

but task is already holding lock:
000000001cfe7903 (&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-executor123/8098:
 #0: 00000000e0cd3ab0 (sb_writers#11){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
 #0: 00000000e0cd3ab0 (sb_writers#11){.+.+}, at: vfs_writev+0x259/0x2e0 fs/read_write.c:1004
 #1: 00000000d5aa7aec (&sb->s_type->i_mutex_key#17){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
 #1: 00000000d5aa7aec (&sb->s_type->i_mutex_key#17){+.+.}, at: generic_file_write_iter+0x99/0x730 mm/filemap.c:3320
 #2: 000000001cfe7903 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457
 #3: 00000000f4d99e6c (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_allocate+0xe0/0xa60 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 1 PID: 8098 Comm: syz-executor123 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_allocate+0x197/0xa60 fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0x436/0xf40 fs/hfsplus/extents.c:468
 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_perform_write+0x1f8/0x4d0 mm/filemap.c:3170
 __generic_file_write_iter+0x24b/0x610 mm/filemap.c:3295
 generic_file_write_iter+0x3f8/0x730 mm/filemap.c:3323
 call_write_iter include/linux/fs.h:1821 [inline]
 do_iter_readv_writev+0x668/0x790 fs/read_write.c:681
 do_iter_write+0x182/0x5d0 fs/read_write.c:960
 vfs_writev+0x153/0x2e0 fs/read_write.c:1005
 do_pwritev+0x1b6/0x270 fs/read_write.c:1094
 __do_sys_pwritev2 fs/read_write.c:1153 [inline]
 __se_sys_pwritev2 fs/read_write.c:1144 [inline]
 __x64_sys_pwritev2+0xeb/0x150 fs/read_write.c:1144
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f19076887d9
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 f