loop0: detected capacity change from 0 to 64
============================================
WARNING: possible recursive locking detected
6.7.0-rc8-syzkaller #0 Not tainted
--------------------------------------------
syz-executor279/5059 is trying to acquire lock:
ffff888079c100f8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397
but task is already holding lock:
ffff888079c10778 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&HFS_I(tree->inode)->extents_lock);
lock(&HFS_I(tree->inode)->extents_lock);
*** DEADLOCK ***
May be due to missing lock nesting notation
5 locks held by syz-executor279/5059:
#0: ffff88807a160418 (sb_writers#9){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3535 [inline]
#0: ffff88807a160418 (sb_writers#9){.+.+}-{0:0}, at: path_openat+0x19f6/0x2c50 fs/namei.c:3776
#1: ffff888079c10fa8 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff888079c10fa8 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3543 [inline]
#1: ffff888079c10fa8 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x8bd/0x2c50 fs/namei.c:3776
#2: ffff88807a1640b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfs_find_init+0x1b6/0x220 fs/hfs/bfind.c:30
#3: ffff888079c10778 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397
#4: ffff88807a1620b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x17f/0x220 fs/hfs/bfind.c:33
stack backtrace:
CPU: 0 PID: 5059 Comm: syz-executor279 Not tainted 6.7.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
check_deadlock kernel/locking/lockdep.c:3062 [inline]
validate_chain kernel/locking/lockdep.c:3856 [inline]
__lock_acquire+0x20f8/0x3b20 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x175/0x9d0 kernel/locking/mutex.c:747
hfs_extend_file+0xa2/0xb10 fs/hfs/extent.c:397
hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234
__hfs_ext_write_extent+0x3cb/0x520 fs/hfs/extent.c:121
__hfs_ext_cache_extent fs/hfs/extent.c:174 [inline]
hfs_ext_read_extent+0x805/0x9d0 fs/hfs/extent.c:202
hfs_extend_file+0x4e0/0xb10 fs/hfs/extent.c:401
hfs_bmap_reserve+0x29c/0x370 fs/hfs/btree.c:234
hfs_cat_create+0x227/0x810 fs/hfs/catalog.c:104
hfs_create+0x67/0xe0 fs/hfs/dir.c:202
lookup_open.isra.0+0x1095/0x13b0 fs/namei.c:3477
open_last_lookups fs/namei.c:3546 [inline]
path_openat+0x922/0x2c50 fs/namei.c:3776
do_filp_open+0x1de/0x430 fs/namei.c:3809
do_sys_openat2+0x176/0x1e0 fs/open.c:1437
do_sys_open fs/open.c:1452 [inline]
__do_sys_openat fs/open.c:1468 [inline]
__se_sys_openat fs/open.c:1463 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1463
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f776291b759
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f77628d7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f77629a46c8 RCX: 00007f776291b759
RDX: 000000000000275a RSI: 0000000020000000 RDI: 00000000ffffff9c
RBP: 00007f77629a46c0 R08: 00007f77629a46c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f77629a46cc
R13: 0000000000000006 R14: 00007ffd59ba19f0 R15: 00007ffd59ba1ad8
</TASK>
hfs: request for non-existent node 16777216 in B*Tree
hfs: request for non-existent node 16777216 in B*Tree
hfs: inconsistency in B*Tree (5,0,1,0,1)