============================================
WARNING: possible recursive locking detected
6.13.0-rc7-syzkaller-g1950a0af2d55 #0 Not tainted
--------------------------------------------
syz.2.3/6511 is trying to acquire lock:
ffff0000f14540b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
but task is already holding lock:
ffff0000f14540b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
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.2.3/6511:
#0: ffff0000f130c420 (sb_writers#12){.+.+}-{0:0}, at: do_ftruncate+0x1e4/0x4cc fs/open.c:178
#1: ffff0000f15302f8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff0000f15302f8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: do_truncate fs/open.c:63 [inline]
#1: ffff0000f15302f8 (&sb->s_type->i_mutex_key#20){+.+.}-{4:4}, at: do_ftruncate+0x3d0/0x4cc fs/open.c:181
#2: ffff0000f1530108 (&hip->extents_lock){+.+.}-{4:4}, at: hfsplus_file_truncate+0x24c/0xa18 fs/hfsplus/extents.c:577
#3: ffff0000f14540b0 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
#4: ffff0000cf300108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1d0/0x1544 fs/hfsplus/extents.c:458
stack backtrace:
CPU: 1 UID: 0 PID: 6511 Comm: syz.2.3 Not tainted 6.13.0-rc7-syzkaller-g1950a0af2d55 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
dump_stack+0x1c/0x28 lib/dump_stack.c:129
print_deadlock_bug+0x4e8/0x668 kernel/locking/lockdep.c:3037
check_deadlock kernel/locking/lockdep.c:3089 [inline]
validate_chain kernel/locking/lockdep.c:3891 [inline]
__lock_acquire+0x6240/0x7904 kernel/locking/lockdep.c:5226
lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849
__mutex_lock_common+0x218/0x28f4 kernel/locking/mutex.c:585
__mutex_lock kernel/locking/mutex.c:735 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:787
hfsplus_find_init+0x144/0x1bc fs/hfsplus/bfind.c:28
hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
hfsplus_file_extend+0x370/0x1544 fs/hfsplus/extents.c:462
hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358
__hfsplus_ext_write_extent+0x1e8/0x4ac fs/hfsplus/extents.c:104
__hfsplus_ext_cache_extent+0x84/0xa84 fs/hfsplus/extents.c:186
hfsplus_file_truncate+0x3d0/0xa18 fs/hfsplus/extents.c:600
hfsplus_setattr+0x184/0x24c fs/hfsplus/inode.c:264
notify_change+0x9f0/0xca0 fs/attr.c:552
do_truncate fs/open.c:65 [inline]
do_ftruncate+0x3e4/0x4cc fs/open.c:181
do_sys_ftruncate fs/open.c:196 [inline]
__do_sys_ftruncate fs/open.c:201 [inline]
__se_sys_ftruncate fs/open.c:199 [inline]
__arm64_sys_ftruncate+0x94/0xec fs/open.c:199
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600