============================================
WARNING: possible recursive locking detected
6.12.0-rc1-syzkaller-g80cb3fb61135 #0 Not tainted
--------------------------------------------
syz-executor/6427 is trying to acquire lock:
ffff0000eefee078 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline]
ffff0000eefee078 (&ni->ni_lock/4){+.+.}-{3:3}, at: mi_read+0x26c/0x4d8 fs/ntfs3/record.c:148
but task is already holding lock:
ffff0000ea691708 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline]
ffff0000ea691708 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf8/0x1f8 fs/ntfs3/namei.c:84
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&ni->ni_lock/4);
lock(&ni->ni_lock/4);
*** DEADLOCK ***
May be due to missing lock nesting notation
2 locks held by syz-executor/6427:
#0: ffff0000ea6919a0 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:825 [inline]
#0: ffff0000ea6919a0 (&type->i_mutex_dir_key#17){++++}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1748
#1: ffff0000ea691708 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline]
#1: ffff0000ea691708 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf8/0x1f8 fs/ntfs3/namei.c:84
stack backtrace:
CPU: 0 UID: 0 PID: 6427 Comm: syz-executor Not tainted 6.12.0-rc1-syzkaller-g80cb3fb61135 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:319
show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:326
__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+0x6180/0x77c8 kernel/locking/lockdep.c:5202
lock_acquire+0x240/0x728 kernel/locking/lockdep.c:5825
__mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608
__mutex_lock kernel/locking/mutex.c:752 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
ni_lock fs/ntfs3/ntfs_fs.h:1109 [inline]
mi_read+0x26c/0x4d8 fs/ntfs3/record.c:148
ntfs_read_mft fs/ntfs3/inode.c:70 [inline]
ntfs_iget5+0x358/0x2c0c fs/ntfs3/inode.c:537
dir_search_u+0x298/0x324 fs/ntfs3/dir.c:264
ntfs_lookup+0x108/0x1f8 fs/ntfs3/namei.c:85
__lookup_slow+0x250/0x374 fs/namei.c:1732
lookup_slow+0x60/0x84 fs/namei.c:1749
walk_component+0x280/0x36c fs/namei.c:2053
lookup_last fs/namei.c:2556 [inline]
path_lookupat+0x13c/0x3d0 fs/namei.c:2580
filename_lookup+0x1d4/0x4e0 fs/namei.c:2609
user_path_at+0x50/0x74 fs/namei.c:3016
ksys_umount fs/namespace.c:2033 [inline]
__do_sys_umount fs/namespace.c:2041 [inline]
__se_sys_umount fs/namespace.c:2039 [inline]
__arm64_sys_umount+0xf4/0x178 fs/namespace.c:2039
__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:732
el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:750
el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598