Hello,
syzbot found the following issue on:
HEAD commit: 2ddbd0f967b3 Linux 5.15.102
git tree: linux-5.15.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=156c7cecc80000
kernel config:
https://syzkaller.appspot.com/x/.config?x=fec083380faceb1e
dashboard link:
https://syzkaller.appspot.com/bug?extid=de116336948b785c6555
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/156d2aa91f3c/disk-2ddbd0f9.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/f0e97f5be5fb/vmlinux-2ddbd0f9.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/20d0a55a041d/bzImage-2ddbd0f9.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+de1163...@syzkaller.appspotmail.com
============================================
WARNING: possible recursive locking detected
5.15.102-syzkaller #0 Not tainted
--------------------------------------------
syz-executor.4/6088 is trying to acquire lock:
ffff88809ae14360 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1107 [inline]
ffff88809ae14360 (&ni->ni_lock/4){+.+.}-{3:3}, at: mi_read+0x2f2/0x560 fs/ntfs3/record.c:148
but task is already holding lock:
ffff8880302e2d40 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1107 [inline]
ffff8880302e2d40 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf5/0x190 fs/ntfs3/namei.c:82
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.4/6088:
#0: ffff8880302e2fe0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline]
#0: ffff8880302e2fe0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: open_last_lookups fs/namei.c:3403 [inline]
#0: ffff8880302e2fe0 (&type->i_mutex_dir_key#10){++++}-{3:3}, at: path_openat+0x809/0x2ee0 fs/namei.c:3612
#1: ffff8880302e2d40 (&ni->ni_lock/4){+.+.}-{3:3}, at: ni_lock fs/ntfs3/ntfs_fs.h:1107 [inline]
#1: ffff8880302e2d40 (&ni->ni_lock/4){+.+.}-{3:3}, at: ntfs_lookup+0xf5/0x190 fs/ntfs3/namei.c:82
stack backtrace:
CPU: 0 PID: 6088 Comm: syz-executor.4 Not tainted 5.15.102-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
print_deadlock_bug kernel/locking/lockdep.c:2946 [inline]
check_deadlock kernel/locking/lockdep.c:2989 [inline]
validate_chain+0x46cf/0x58b0 kernel/locking/lockdep.c:3774
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011
lock_acquire+0x1ff/0x570 kernel/locking/lockdep.c:5622
__mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
ni_lock fs/ntfs3/ntfs_fs.h:1107 [inline]
mi_read+0x2f2/0x560 fs/ntfs3/record.c:148
ntfs_read_mft fs/ntfs3/inode.c:69 [inline]
ntfs_iget5+0x44c/0x3760 fs/ntfs3/inode.c:517
dir_search_u+0x2f6/0x390 fs/ntfs3/dir.c:264
ntfs_lookup+0x102/0x190 fs/ntfs3/namei.c:83
lookup_open fs/namei.c:3312 [inline]
open_last_lookups fs/namei.c:3404 [inline]
path_openat+0x10d2/0x2ee0 fs/namei.c:3612
do_filp_open+0x21c/0x460 fs/namei.c:3642
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_open fs/open.c:1235 [inline]
__se_sys_open fs/open.c:1231 [inline]
__x64_sys_open+0x221/0x270 fs/open.c:1231
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f93ef5460f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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:00007f93e5897168 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f93ef666050 RCX: 00007f93ef5460f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 00007f93ef5a1ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8e82a3df R14: 00007f93e5897300 R15: 0000000000022000
</TASK>
---
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