From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oo1-f80.google.com (mail-oo1-f80.google.com [209.85.161.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4DA342DEA97 for ; Mon, 2 Feb 2026 18:16:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770056194; cv=none; b=tWHPoAngNb3ENvMo/G9O3OEI0HPeLSHRi9ypRoBrtQSyzETc2nBLuKuXlofloL+dk8L40mSt/PBPZRaM9AEV3aWW7p9qqUNyDE7h5gdMrlDkiVS9wvj4opNTT1y8RtAB7SRTe4p5yFc9ygV7nJVhFTYLNqgVD5UoAta3X0QfWMY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770056194; c=relaxed/simple; bh=jFnMqtTmWFcR7sducWrXbQvtmVbuG8dc50u3vRxIrqk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=MFMGQJYzFBBhKw4TGSe42tD1Abrmo3W4R3XbQUe13pH+zzHT5kkDSqCQ3dl6YGGorotqLlQKEI2x00/Z7eGwrckuS3usCLZVjTXwX1FZZhsQVgF1qTzBEefKDi6MePmk+OOrjBFQ9kdfPy7oKXHEf1uvWrDd29h569wpjsAHDKs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.161.80 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-oo1-f80.google.com with SMTP id 006d021491bc7-6640dc1cb33so10797984eaf.0 for ; Mon, 02 Feb 2026 10:16:32 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770056192; x=1770660992; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=DeM9Cc+ZxVsP+XJId6dL+oom/SOv15NBealpu8riIbE=; b=DUSx4MUAY3jXrXTlYWoGwH1xyPjTuFtFSF4gbSIwz2ElgTkO4U0rKyh/6nmh99AFH6 dP2RUqlnigqIf1gBfzzAtQI1M5Ybr1dgdb5sHtqKS1UDo2NupFBFhKs9nYdx/rHLl38q dbGZHJb30g+Ne1In5idwz8Ip4svj0LT64WbF52hldGnDHHxTug5wSqKd3wHMHy0Jvcms 2V4swDV5XdpP2mDjXDXz307q0CNkavG0PfYI4cB232XyzBJEkHOV2NATR0L6UiqpRGaC EiNeBspVJxYhq6HrZ/zFJEjPiE7Ad4mYUv2zQaAQ82k62D3aP427OYi6OcImFDaQ/ZW+ XvhQ== X-Forwarded-Encrypted: i=1; AJvYcCVxlKncRa/T+zwJO9Priw496w/6j8/R5//bbzikqGWZOdEXsvQbLCf1KWCJH/53yOPk7atI2Xree6JqhAk=@vger.kernel.org X-Gm-Message-State: AOJu0Yw7tpbFqA51ubPZbVBoLD0ZzKJhB8OY3K7i22mBDJSh9d126L5B tBAQIEW7rETyyBJ1fvGpIgUXMEDVT0XwS+juSut3tDRgn/r2TfeVemawWNwN9FzFyMPY9tcAQwc DQE7FfYMNwIAMGVqnEb6XvgI/DGiG04gbeZPWHV3fh07yVyj7KAiY3GJgdw8= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:4cc7:b0:663:e77:3cde with SMTP id 006d021491bc7-6630f3ab512mr4409117eaf.76.1770056191870; Mon, 02 Feb 2026 10:16:31 -0800 (PST) Date: Mon, 02 Feb 2026 10:16:31 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6980e9ff.050a0220.16b13.00a9.GAE@google.com> Subject: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data (4) From: syzbot To: adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com, tytso@mit.edu Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 162b42445b58 Merge tag 'iommu-fixes-v6.19-rc7' of git://gi.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12c48402580000 kernel config: https://syzkaller.appspot.com/x/.config?x=fea461e951c03b1b dashboard link: https://syzkaller.appspot.com/bug?extid=7de5fe447862fc37576f compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11ec7bfa580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/98939f243052/disk-162b4244.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2ce9a7b8e049/vmlinux-162b4244.xz kernel image: https://storage.googleapis.com/syzbot-assets/99eb2d7c3e94/bzImage-162b4244.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/82c4262402e2/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=1196145a580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+7de5fe447862fc37576f@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ext4/inline.c:240! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 6836 Comm: syz.5.137 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 RIP: 0010:ext4_write_inline_data+0x40b/0x4f0 fs/ext4/inline.c:240 Code: fe e8 e9 70 3f ff 42 8d 44 23 c4 bb 3c 00 00 00 89 44 24 08 44 29 e3 e9 aa fe ff ff e8 ce 70 3f ff 90 0f 0b e8 c6 70 3f ff 90 <0f> 0b e8 be 70 3f ff 48 8d 3d b7 58 f6 0d 48 c7 c2 60 5b ac 8b 4c RSP: 0018:ffffc9000b0b74e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000001000 RCX: ffffffff82c7675b RDX: ffff88802c845b80 RSI: ffffffff82c7697a RDI: ffff88802c845b80 RBP: ffff888075742918 R08: 0000000000000006 R09: 0000000000004000 R10: 000000000000003c R11: 0000000000000000 R12: 0000000000003000 R13: 0000000000004000 R14: ffffc9000b0b7580 R15: ffff888075742e82 FS: 00007fb1c0b036c0(0000) GS:ffff8881245dc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f284e6ff000 CR3: 000000005cb37000 CR4: 0000000000350ef0 Call Trace: ext4_write_inline_data_end+0x2a8/0xdb0 fs/ext4/inline.c:817 ext4_da_write_end+0x4f7/0xf20 fs/ext4/inode.c:3286 generic_perform_write+0x513/0xa40 mm/filemap.c:4335 ext4_buffered_write_iter+0x119/0x440 fs/ext4/file.c:299 ext4_file_write_iter+0xa3d/0x1d90 fs/ext4/file.c:723 iter_file_splice_write+0x82b/0x10a0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x192/0x6c0 fs/splice.c:1161 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1230 do_sendfile+0xadc/0xe20 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64 fs/read_write.c:1417 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb1bfb9aeb9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb1c0b03028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb1bfe15fa0 RCX: 00007fb1bfb9aeb9 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000004 RBP: 00007fb1bfc08c1f R08: 0000000000000000 R09: 0000000000000000 R10: 000000000e3aa6ea R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb1bfe16038 R14: 00007fb1bfe15fa0 R15: 00007ffc03931cf8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_write_inline_data+0x40b/0x4f0 fs/ext4/inline.c:240 Code: fe e8 e9 70 3f ff 42 8d 44 23 c4 bb 3c 00 00 00 89 44 24 08 44 29 e3 e9 aa fe ff ff e8 ce 70 3f ff 90 0f 0b e8 c6 70 3f ff 90 <0f> 0b e8 be 70 3f ff 48 8d 3d b7 58 f6 0d 48 c7 c2 60 5b ac 8b 4c RSP: 0018:ffffc9000b0b74e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000001000 RCX: ffffffff82c7675b RDX: ffff88802c845b80 RSI: ffffffff82c7697a RDI: ffff88802c845b80 RBP: ffff888075742918 R08: 0000000000000006 R09: 0000000000004000 R10: 000000000000003c R11: 0000000000000000 R12: 0000000000003000 R13: 0000000000004000 R14: ffffc9000b0b7580 R15: ffff888075742e82 FS: 00007fb1c0b036c0(0000) GS:ffff8881246dc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007efdf1812000 CR3: 000000005cb37000 CR4: 0000000000350ef0 --- 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 report is already addressed, 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 report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup