MIME-Version: 1.0
Date:   Thu, 02 Mar 2023 07:48:58 -0800
Message-ID: <000000000000562d8105f5ecc4ca@google.com>
Subject: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data_end
From:   syzbot <syzbot+198e7455f3a4f38b838a@syzkaller.appspotmail.com>
To:     adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        syzkaller-bugs@googlegroups.com, tytso@mit.edu
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hello,

syzbot found the following issue on:

HEAD commit:    2ebd1fbb946d Merge branch 'for-next/core' into for-kernelci
git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=13de1350c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3519974f3f27816d
dashboard link: https://syzkaller.appspot.com/bug?extid=198e7455f3a4f38b838a
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=160fccacc80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17e5963cc80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/16985cc7a274/disk-2ebd1fbb.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/fd3452567115/vmlinux-2ebd1fbb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c75510922212/Image-2ebd1fbb.gz.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0427397bf5ad/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+198e7455f3a4f38b838a@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:226!
Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 6191 Comm: syz-executor142 Not tainted 6.2.0-syzkaller-18300-g2ebd1fbb946d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ext4_write_inline_data fs/ext4/inline.c:226 [inline]
pc : ext4_write_inline_data_end+0xe28/0xf84 fs/ext4/inline.c:767
lr : ext4_write_inline_data fs/ext4/inline.c:226 [inline]
lr : ext4_write_inline_data_end+0xe28/0xf84 fs/ext4/inline.c:767
sp : ffff80001eac7520
x29: ffff80001eac7630 x28: ffff0000d7a63680 x27: dfff800000000000
x26: 0000000000000060 x25: ffff80001eac75c0 x24: 0000000040000000
x23: 000000000000006c x22: 0000000000000060 x21: 000000000000000c
x20: ffff0000de2e48e8 x19: 0000000000000000 x18: ffff80001eac70d8
x17: ffff800015b8d000 x16: ffff80001231393c x15: 00000000200002c0
x14: 1ffff00002b720af x13: 0000000000000007 x12: 0000000000000001
x11: ff80800008e4087c x10: 0000000000000000 x9 : ffff800008e4087c
x8 : ffff0000d7a63680 x7 : ffff800008de16f0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 00000000000008a5 x3 : ffff800008b36a88
x2 : 0000000000000001 x1 : 0000000000000060 x0 : 000000000000006c
Call trace:
 ext4_write_inline_data fs/ext4/inline.c:226 [inline]
 ext4_write_inline_data_end+0xe28/0xf84 fs/ext4/inline.c:767
 ext4_da_write_end+0x330/0x9fc fs/ext4/inode.c:3150
 generic_perform_write+0x384/0x55c mm/filemap.c:3784
 ext4_buffered_write_iter+0x2e0/0x538 fs/ext4/file.c:285
 ext4_file_write_iter+0x188/0x16c0
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x914 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: 14000043 97db2731 d4210000 97db272f (d4210000) 
---[ end trace 0000000000000000 ]---


---
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