Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18;
MIME-Version: 1.0
Date:   Fri, 18 Aug 2023 09:15:03 -0700
Message-ID: <000000000000c74d44060334d476@google.com>
Subject: [syzbot] [ntfs?] WARNING in do_open_execat
From:   syzbot <syzbot+6ec38f7a8db3b3fb1002@syzkaller.appspotmail.com>
To:     anton@tuxera.com, brauner@kernel.org, ebiederm@xmission.com,
        keescook@chromium.org, linux-fsdevel@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        linux-ntfs-dev@lists.sourceforge.net,
        syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hello,

syzbot found the following issue on:

HEAD commit:    16931859a650 Merge tag 'nfsd-6.5-4' of git://git.kernel.or..
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=13e2673da80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=aa796b6080b04102
dashboard link: https://syzkaller.appspot.com/bug?extid=6ec38f7a8db3b3fb1002
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17cdbc65a80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1262d8cfa80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/eecc010800b4/disk-16931859.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/f45ae06377a7/vmlinux-16931859.xz
kernel image: https://storage.googleapis.com/syzbot-assets/68891896edba/bzImage-16931859.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/4b6ab78b223a/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+6ec38f7a8db3b3fb1002@syzkaller.appspotmail.com

ntfs: volume version 3.1.
process 'syz-executor300' launched './file1' with NULL argv: empty string added
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5020 at fs/exec.c:933 do_open_execat+0x18f/0x3f0 fs/exec.c:933
Modules linked in:
CPU: 0 PID: 5020 Comm: syz-executor300 Not tainted 6.5.0-rc6-syzkaller-00038-g16931859a650 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:do_open_execat+0x18f/0x3f0 fs/exec.c:933
Code: 8e 46 02 00 00 41 0f b7 1e bf 00 80 ff ff 66 81 e3 00 f0 89 de e8 b1 67 9b ff 66 81 fb 00 80 0f 84 8b 00 00 00 e8 51 6c 9b ff <0f> 0b 48 c7 c3 f3 ff ff ff e8 43 6c 9b ff 4c 89 e7 e8 4b c9 fe ff
RSP: 0018:ffffc90003b0fd10 EFLAGS: 00010293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: ffff888028401dc0 RSI: ffffffff81ea9c4f RDI: 0000000000000003
RBP: 1ffff92000761fa2 R08: 0000000000000003 R09: 0000000000008000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88802bf18780
R13: ffff888075d70000 R14: ffff8880742776a0 R15: 0000000000000001
FS:  000055555706b380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe0f1d3ff8 CR3: 0000000015f97000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 bprm_execve fs/exec.c:1830 [inline]
 bprm_execve+0x49d/0x1a50 fs/exec.c:1811
 do_execveat_common.isra.0+0x5d3/0x740 fs/exec.c:1963
 do_execve fs/exec.c:2037 [inline]
 __do_sys_execve fs/exec.c:2113 [inline]
 __se_sys_execve fs/exec.c:2108 [inline]
 __x64_sys_execve+0x8c/0xb0 fs/exec.c:2108
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fee7ec27b39
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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:00007ffe6c369d28 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007fee7ec27b39
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000480
RBP: 00007fee7ec7004b R08: 000000000001ee3b R09: 0000000000000000
R10: 00007ffe6c369bf0 R11: 0000000000000246 R12: 00007fee7ec70055
R13: 00007ffe6c369f08 R14: 0000000000000001 R15: 0000000000000001
 </TASK>


---
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@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the bug is already fixed, let syzbot know by replying with:
#syz fix: exact-commit-title

If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.

If you want to overwrite bug's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)

If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup