loop0: detected capacity change from 0 to 1024
hfsplus: inconsistency in B*Tree (128,1,255,1,0)
============================================
WARNING: possible recursive locking detected
6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0 Not tainted
--------------------------------------------
syz-executor395/5309 is trying to acquire lock:
ffff8880422d0108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458
but task is already holding lock:
ffff8880422d0e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458
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
6 locks held by syz-executor395/5309:
#0: ffff88804026a420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
#1: ffff8880422d24b8 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
#1: ffff8880422d24b8 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320
#2: ffff8880118740b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28
#3: ffff88801ebc80b0 (&tree->tree_lock/2){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28
#4: ffff8880422d0e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458
#5: ffff8880118720b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x14a/0x1c0 fs/hfsplus/bfind.c:28
stack backtrace:
CPU: 0 UID: 0 PID: 5309 Comm: syz-executor395 Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
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+0x1384/0x2050 kernel/locking/lockdep.c:5202
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5825
__mutex_lock_common kernel/locking/mutex.c:608 [inline]
__mutex_lock+0x136/0xd70 kernel/locking/mutex.c:752
hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458
hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358
__hfsplus_ext_write_extent+0x2a4/0x5c0 fs/hfsplus/extents.c:104
__hfsplus_ext_cache_extent+0x84/0xe10 fs/hfsplus/extents.c:186
hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
hfsplus_file_extend+0x48c/0x1b70 fs/hfsplus/extents.c:462
hfsplus_bmap_reserve+0x105/0x4e0 fs/hfsplus/btree.c:358
hfsplus_create_attr+0x1c8/0x640 fs/hfsplus/attributes.c:221
__hfsplus_setxattr+0x6fe/0x22d0 fs/hfsplus/xattr.c:354
hfsplus_setxattr+0xb0/0xe0 fs/hfsplus/xattr.c:432
hfsplus_trusted_setxattr+0x40/0x60 fs/hfsplus/xattr_trusted.c:30
__vfs_setxattr+0x468/0x4a0 fs/xattr.c:200
__vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
vfs_setxattr+0x221/0x430 fs/xattr.c:321
do_setxattr fs/xattr.c:629 [inline]
path_setxattr+0x37e/0x4d0 fs/xattr.c:658
__do_sys_lsetxattr fs/xattr.c:683 [inline]
__se_sys_lsetxattr fs/xattr.c:679 [inline]
__x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:679
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: 0033:0x7f704e2aca99
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd231fbc58 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f704e2aca99
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 0000000020000040
RBP: 00007f704e3205f0 R08: 0000000000000000 R09: 00005555908174c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd231fbc80
R13: 00007ffd231fbea8 R14: 431bde82d7b634db R15: 00007f704e2f503b
</TASK>