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Date: Wed, 05 Oct 2022 02:05:41 -0700
From: syzbot <syzbot+b9bd2bf91ab68a2ab30c@...kaller.appspotmail.com>
To: almaz.alexandrovich@...agon-software.com,
linux-kernel@...r.kernel.org, llvm@...ts.linux.dev,
nathan@...nel.org, ndesaulniers@...gle.com, ntfs3@...ts.linux.dev,
syzkaller-bugs@...glegroups.com, trix@...hat.com
Subject: [syzbot] WARNING: nested lock was not taken in ntfs_fill_super
Hello,
syzbot found the following issue on:
HEAD commit: 4fe89d07dcc2 Linux 6.0
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13ce7332880000
kernel config: https://syzkaller.appspot.com/x/.config?x=48b99eaecc2b324f
dashboard link: https://syzkaller.appspot.com/bug?extid=b9bd2bf91ab68a2ab30c
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, 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/ce1d9b74a5e0/disk-4fe89d07.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/06e7c02fa7ba/vmlinux-4fe89d07.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b9bd2bf91ab68a2ab30c@...kaller.appspotmail.com
==================================
WARNING: Nested lock was not taken
6.0.0-syzkaller #0 Not tainted
----------------------------------
syz-executor.3/23677 is trying to lock:
ffff88803d162070 (&sb->s_type->i_lock_key#36){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline]
ffff88803d162070 (&sb->s_type->i_lock_key#36){+.+.}-{2:2}, at: _atomic_dec_and_lock+0x9d/0x110 lib/dec_and_lock.c:28
but this task is not holding:
general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 23677 Comm: syz-executor.3 Not tainted 6.0.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4885 [inline]
RIP: 0010:__lock_acquire+0x1112/0x1f60 kernel/locking/lockdep.c:5044
Code: 3c 30 00 48 8b 5c 24 70 74 12 48 89 df e8 76 b5 72 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 4f b5 72 00 48 8b 33 45 31 f6 48
RSP: 0000:ffffc900150af828 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: e0bee71cabdf0c00
RDX: ffffc90004761000 RSI: 00000000000170e6 RDI: 00000000000170e7
RBP: ffff88807be705e0 R08: ffffffff816bd38d R09: ffffed1017344f14
R10: ffffed1017344f14 R11: 1ffff11017344f13 R12: ffff88807be70848
R13: 08bc104c6bc4a8e0 R14: dffffc0000000000 R15: ffff88807be70000
FS: 00007f83fbf0f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83fb3b0000 CR3: 000000001cc6f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5666
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
_atomic_dec_and_lock+0x9d/0x110 lib/dec_and_lock.c:28
iput+0x85/0x760 fs/inode.c:1766
ntfs_fill_super+0x3af3/0x42a0 fs/ntfs3/super.c:1190
get_tree_bdev+0x400/0x620 fs/super.c:1323
vfs_get_tree+0x88/0x270 fs/super.c:1530
do_new_mount+0x289/0xad0 fs/namespace.c:3040
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
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+0x63/0xcd
RIP: 0033:0x7f83fae8bada
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007f83fbf0ef88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f83fae8bada
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f83fbf0efe0
RBP: 00007f83fbf0f020 R08: 00007f83fbf0f020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f83fbf0efe0 R15: 0000000020002180
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:print_lock_nested_lock_not_held kernel/locking/lockdep.c:4885 [inline]
RIP: 0010:__lock_acquire+0x1112/0x1f60 kernel/locking/lockdep.c:5044
Code: 3c 30 00 48 8b 5c 24 70 74 12 48 89 df e8 76 b5 72 00 49 be 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 4f b5 72 00 48 8b 33 45 31 f6 48
RSP: 0000:ffffc900150af828 EFLAGS: 00010006
RAX: 0000000000000003 RBX: 0000000000000018 RCX: e0bee71cabdf0c00
RDX: ffffc90004761000 RSI: 00000000000170e6 RDI: 00000000000170e7
RBP: ffff88807be705e0 R08: ffffffff816bd38d R09: ffffed1017344f14
R10: ffffed1017344f14 R11: 1ffff11017344f13 R12: ffff88807be70848
R13: 08bc104c6bc4a8e0 R14: dffffc0000000000 R15: ffff88807be70000
FS: 00007f83fbf0f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f83fb3b0000 CR3: 000000001cc6f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 3c 30 cmp $0x30,%al
2: 00 48 8b add %cl,-0x75(%rax)
5: 5c pop %rsp
6: 24 70 and $0x70,%al
8: 74 12 je 0x1c
a: 48 89 df mov %rbx,%rdi
d: e8 76 b5 72 00 callq 0x72b588
12: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
19: fc ff df
1c: 48 8b 1b mov (%rbx),%rbx
1f: 48 83 c3 18 add $0x18,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 4f b5 72 00 callq 0x72b588
39: 48 8b 33 mov (%rbx),%rsi
3c: 45 31 f6 xor %r14d,%r14d
3f: 48 rex.W
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
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