============================================
WARNING: possible recursive locking detected
6.13.0-rc5-syzkaller-00163-gab75170520d4 #0 Not tainted
--------------------------------------------
syz.3.662/10501 is trying to acquire lock:
ffff8880272d20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x16e/0x1f0
but task is already holding lock:
ffff8880272d20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x16e/0x1f0
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&tree->tree_lock/1);
lock(&tree->tree_lock/1);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by syz.3.662/10501:
#0: ffff8880217e2420 (sb_writers#13){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2964 [inline]
#0: ffff8880217e2420 (sb_writers#13){.+.+}-{0:0}, at: vfs_write+0x225/0xd30 fs/read_write.c:675
#1: ffff888060176aa0 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff888060176aa0 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: generic_file_write_iter+0x82/0x310 mm/filemap.c:4179
#2: ffff8880601768f8 (&HFS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397
#3: ffff8880272d20b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x16e/0x1f0
#4: ffff888060175bf8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xff/0x1450 fs/hfs/extent.c:397
stack backtrace:
CPU: 1 UID: 0 PID: 10501 Comm: syz.3.662 Not tainted 6.13.0-rc5-syzkaller-00163-gab75170520d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3037
check_deadlock kernel/locking/lockdep.c:3089 [inline]
validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3891
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__mutex_lock_common kernel/locking/mutex.c:585 [inline]
__mutex_lock+0x1ac/0xee0 kernel/locking/mutex.c:735
hfs_find_init+0x16e/0x1f0
hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
hfs_extend_file+0x31b/0x1450 fs/hfs/extent.c:401
hfs_bmap_reserve+0xd9/0x400 fs/hfs/btree.c:234
__hfs_ext_write_extent+0x22e/0x4f0 fs/hfs/extent.c:121
__hfs_ext_cache_extent+0x6a/0x990 fs/hfs/extent.c:174
hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
hfs_extend_file+0x344/0x1450 fs/hfs/extent.c:401
hfs_get_block+0x3e4/0xb60 fs/hfs/extent.c:353
__block_write_begin_int+0x692/0x19a0 fs/buffer.c:2116
block_write_begin fs/buffer.c:2226 [inline]
cont_write_begin+0x77f/0xb40 fs/buffer.c:2577
hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
cont_expand_zero fs/buffer.c:2504 [inline]
cont_write_begin+0x32b/0xb40 fs/buffer.c:2567
hfs_write_begin+0x68/0xb0 fs/hfs/inode.c:52
generic_perform_write+0x346/0x990 mm/filemap.c:4055
generic_file_write_iter+0xae/0x310 mm/filemap.c:4182
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0xaeb/0xd30 fs/read_write.c:679
ksys_pwrite64 fs/read_write.c:786 [inline]
__do_sys_pwrite64 fs/read_write.c:794 [inline]
__se_sys_pwrite64 fs/read_write.c:791 [inline]
__x64_sys_pwrite64+0x1ac/0x240 fs/read_write.c:791
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f16b85d29
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6f179fa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f6f16d75fa0 RCX: 00007f6f16b85d29
RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000005
RBP: 00007f6f16c01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008080c61 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6f16d75fa0 R15: 00007fffc7c96108
</TASK>