============================================
WARNING: possible recursive locking detected
6.14.0-rc7-syzkaller-ga2392f333575 #0 Not tainted
--------------------------------------------
syz.4.451/8977 is trying to acquire lock:
ffff0000dc6525b8 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
ffff0000dc6525b8 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: mi_read+0x26c/0x4d8 fs/ntfs3/record.c:148
but task is already holding lock:
ffff0000dc654a70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
ffff0000dc654a70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_rename+0x5c4/0xae0 fs/ntfs3/namei.c:312
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&ni->ni_lock#2/5);
lock(&ni->ni_lock#2/5);
*** DEADLOCK ***
May be due to missing lock nesting notation
6 locks held by syz.4.451/8977:
#0: ffff0000cd870420 (sb_writers#28){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:547
#1: ffff0000da8771c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#1: ffff0000da8771c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: lock_rename fs/namei.c:3217 [inline]
#1: ffff0000da8771c0 (&type->i_mutex_dir_key#20/1){+.+.}-{4:4}, at: do_renameat2+0x4ec/0xe50 fs/namei.c:5161
#2: ffff0000dc654d08 (&sb->s_type->i_mutex_key#35/4){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:912 [inline]
#2: ffff0000dc654d08 (&sb->s_type->i_mutex_key#35/4){+.+.}-{4:4}, at: lock_two_nondirectories+0xfc/0x14c fs/inode.c:1283
#3: ffff0000da876f28 (&ni->ni_lock/6){+.+.}-{4:4}, at: ni_lock_dir fs/ntfs3/ntfs_fs.h:1116 [inline]
#3: ffff0000da876f28 (&ni->ni_lock/6){+.+.}-{4:4}, at: ntfs_rename+0x5b4/0xae0 fs/ntfs3/namei.c:311
#4: ffff0000dc654a70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
#4: ffff0000dc654a70 (&ni->ni_lock#2/5){+.+.}-{4:4}, at: ntfs_rename+0x5c4/0xae0 fs/ntfs3/namei.c:312
#5: ffff0000d903e128 (&wnd->rw_lock/1){+.+.}-{4:4}, at: ntfs_look_free_mft+0x190/0xd1c fs/ntfs3/fsntfs.c:571
stack backtrace:
CPU: 0 UID: 0 PID: 8977 Comm: syz.4.451 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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:3039
check_deadlock kernel/locking/lockdep.c:3091 [inline]
validate_chain kernel/locking/lockdep.c:3893 [inline]
__lock_acquire+0x6240/0x7904 kernel/locking/lockdep.c:5228
lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
__mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585
__mutex_lock kernel/locking/mutex.c:730 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
ni_lock fs/ntfs3/ntfs_fs.h:1111 [inline]
mi_read+0x26c/0x4d8 fs/ntfs3/record.c:148
mi_format_new+0x180/0x548 fs/ntfs3/record.c:434
ni_add_subrecord+0xd0/0x3c4 fs/ntfs3/frecord.c:378
ntfs_look_free_mft+0x4c8/0xd1c fs/ntfs3/fsntfs.c:715
ni_create_attr_list+0x87c/0x1254 fs/ntfs3/frecord.c:883
ni_ins_attr_ext+0x3c8/0xb54 fs/ntfs3/frecord.c:981
ni_insert_attr fs/ntfs3/frecord.c:1148 [inline]
ni_insert_resident fs/ntfs3/frecord.c:1532 [inline]
ni_add_name+0x664/0xc38 fs/ntfs3/frecord.c:3044
ni_rename+0xc8/0x1d8 fs/ntfs3/frecord.c:3084
ntfs_rename+0x610/0xae0 fs/ntfs3/namei.c:317
vfs_rename+0x9bc/0xc84 fs/namei.c:5069
do_renameat2+0x9d8/0xe50 fs/namei.c:5226
__do_sys_renameat2 fs/namei.c:5260 [inline]
__se_sys_renameat2 fs/namei.c:5257 [inline]
__arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5257
__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