linux-kernel - [syzbot] [ext4?] WARNING in ext4_journal_check

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Message-ID: <0000000000008ef08f0616d88373@google.com>
Date: Wed, 24 Apr 2024 07:30:36 -0700
From: syzbot <syzbot+3325329a0e08fe68bace@...kaller.appspotmail.com>
To: adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org, 
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com, tytso@....edu
Subject: [syzbot] [ext4?] WARNING in ext4_journal_check_start

Hello,

syzbot found the following issue on:

HEAD commit:    7b4f2bc91c15 Add linux-next specific files for 20240418
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1469d1fd180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=ae644165a243bf62
dashboard link: https://syzkaller.appspot.com/bug?extid=3325329a0e08fe68bace
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=123c72bf180000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/524a18e6c5be/disk-7b4f2bc9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/029f1b84d653/vmlinux-7b4f2bc9.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c02d1542e886/bzImage-7b4f2bc9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/8423191c8b73/mount_9.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3325329a0e08fe68bace@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 10063 at fs/ext4/ext4_jbd2.c:73 ext4_journal_check_start+0x1ed/0x250 fs/ext4/ext4_jbd2.c:73
Modules linked in:
CPU: 1 PID: 10063 Comm: syz-executor.3 Not tainted 6.9.0-rc4-next-20240418-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:ext4_journal_check_start+0x1ed/0x250 fs/ext4/ext4_jbd2.c:73
Code: 41 bf e2 ff ff ff 44 89 f8 5b 41 5c 41 5d 41 5e 41 5f c3 cc cc cc cc e8 b1 e4 43 ff 41 bf fb ff ff ff eb e2 e8 a4 e4 43 ff 90 <0f> 0b 90 eb d1 e8 99 e4 43 ff 90 0f 0b 90 43 80 7c 25 00 00 0f 85
RSP: 0018:ffffc90003e976a0 EFLAGS: 00010293
RAX: ffffffff825278ec RBX: 0000000000000001 RCX: ffff888027b01e00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff825277c0 R09: 1ffff1100f837070
R10: dffffc0000000000 R11: ffffed100f837071 R12: dffffc0000000000
R13: 1ffff1100c880cc7 R14: ffff888064406000 R15: ffff888064406638
FS:  00007f52763386c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff27a379198 CR3: 00000000796d6000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4_journal_start_sb+0x181/0x600 fs/ext4/ext4_jbd2.c:105
 ext4_sample_last_mounted fs/ext4/file.c:837 [inline]
 ext4_file_open+0x53e/0x760 fs/ext4/file.c:866
 do_dentry_open+0x95a/0x1720 fs/open.c:955
 do_open fs/namei.c:3650 [inline]
 path_openat+0x289f/0x3280 fs/namei.c:3807
 do_filp_open+0x235/0x490 fs/namei.c:3834
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1405
 do_sys_open fs/open.c:1420 [inline]
 __do_sys_openat fs/open.c:1436 [inline]
 __se_sys_openat fs/open.c:1431 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1431
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f527567dea9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f52763380c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f52757ac050 RCX: 00007f527567dea9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: ffffffffffffff9c
RBP: 00007f52756ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f52757ac050 R15: 00007ffda916c8d8
 </TASK>


---
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