============================================
WARNING: possible recursive locking detected
4.19.211-syzkaller #0 Not tainted
--------------------------------------------
syz-executor836/8113 is trying to acquire lock:
0000000073a45c01 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_get_block+0x292/0x960 fs/hfsplus/extents.c:260

but task is already holding lock:
00000000c965ea01 (&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

5 locks held by syz-executor836/8113:
 #0: 000000004f4d4acc (&type->s_umount_key#46/1){+.+.}, at: alloc_super fs/super.c:226 [inline]
 #0: 000000004f4d4acc (&type->s_umount_key#46/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519
 #1: 00000000316b90e1 (&sbi->vh_mutex){+.+.}, at: hfsplus_fill_super+0x1421/0x19e0 fs/hfsplus/super.c:553
 #2: 0000000041be8d8a (&tree->tree_lock){+.+.}, at: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30
 #3: 00000000c965ea01 (&HFSPLUS_I(inode)->extents_lock){+.+.}, at: hfsplus_file_extend+0x1bb/0xf40 fs/hfsplus/extents.c:457
 #4: 0000000007aae80c (&sbi->alloc_mutex){+.+.}, at: hfsplus_block_allocate+0xe0/0xa60 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 0 PID: 8113 Comm: syz-executor836 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+0x6de/0xa60 fs/hfsplus/bitmap.c:132
 hfsplus_file_extend+0x436/0xf40 fs/hfsplus/extents.c:468
 hfsplus_bmap_reserve+0x298/0x440 fs/hfsplus/btree.c:357
 hfsplus_create_cat+0x1e3/0x1210 fs/hfsplus/catalog.c:272
 hfsplus_fill_super+0x14a8/0x19e0 fs/hfsplus/super.c:560
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2492 [inline]
 do_mount+0x115c/0x2f50 fs/namespace.c:2822
 ksys_mount+0xcf/0x130 fs/namespace.c:3038
 __do_sys_mount fs/namespace.c:3052 [inline]
 __se_sys_mount fs/namespace.c:3049 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3049
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fd68ae1be8a
Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 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:00007ffc1d1beb08 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fd68ae1be8a
RDX: 0000000020000600 RSI: 00000000200000c0 RDI: 00007ffc1d1beb20
RBP: 00007ffc1d1beb20 R08: 00007ffc1d1beb60 R09: 0000000000000618
R10: 0000000002a14010 R11: 0000000000000286 R12: 0000000000000004
R13: 0000555555a882c0 R14: 0000000002a14010 R15: 00007ffc1d1beb60