From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (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 8E5642BAF4 for ; Sat, 13 Sep 2025 15:21:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757776893; cv=none; b=sEtic4STQnxSqScxQL0jg0ydb+T6lJUvfA+0Vq9MO1v4veXk7pLR14FqVtsGSVZsqRANwgoaoV4qEsYr41X95JmUV7frEjKK1t9+jRZvIFp3xFlnopM3cbr5xbDiZ4ZMte2X8F+zU4gz86f/FejEUoM+yi07KlxTMu5JFDmQGBw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757776893; c=relaxed/simple; bh=RVD8gQbDMJ+de91MlBon7BFLDmf1Spiqsd4F3T/HbPk=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=rXwBVWLWV+v7soDkPD18+WN7UFeAVF16XSc5fTvV8qX90c9Cf3+yQOQiDkXJbENErS0mgJVm1CsSooNKVyfVzb9Dg19eB8/MSIaxyfwU3Y/qtOFlGvVkDbzcYqpClQDNTSh2zh+uCBJ0nsnQkvDO1yHPaaaTrhRnc/eui+BdDQI= 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=209.85.166.206 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-il1-f206.google.com with SMTP id e9e14a558f8ab-417306d252cso34894205ab.2 for ; Sat, 13 Sep 2025 08:21:31 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757776890; x=1758381690; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=GEqce8YnI1rs4tL9ATEg3joyhTmgKU8jihNRIpGC0GY=; b=CVtJrJZy3yQWX4W+6lXVXMih7pox/OKWzkUjOLRSoQtTt0Waa28CvmtJYqkqWPukRb 2L2b1ncWYHWTXZSn5KP73B0Uk+9jlebu6xyz06PiTuauqhSGDuRg4iBW2jo9C0Lfo9bP Lc0/KaqkoDB8kQBtw+BRioJDZDWb2qJVn8PomzU7lIbcnbegRg+9gbhhR7o8qMHp1EvM lB9Wo7sa1XN1pwT6t2jtZZkr8/JmrjiBfoAZFxc/ahtiviHvPvye5uvmrALBpfO4N+kl sBJ1LDxXWy5wE0dpbSkOCuBYLWMwApWKwjzc0jI5AmekwrZeMkSRW9iELo1585E7+GUT yp1A== X-Forwarded-Encrypted: i=1; AJvYcCWtwYuxDsKtNVkXnf1N6tZS59DnVFjLsh2XUo5KxGKP3osh8MqaHCOV5ZTwgfG2NkdDEssZMkyQdArB@vger.kernel.org X-Gm-Message-State: AOJu0Yxty11aUtcuefid07q9Bbbu8IHHF94q7Q9ulES6URCvdDBpG1pn D+rCJAXGy5q6lPvUGcc45piedBZ4/iQy1Qwy4JYxdFLu0Vx4M3gDDPruTwtiGwaVyaW4Il1SH6+ xs8yi9Fb5H4gvDGExRlFIp6pbCldd8TEWqfvfFJtVXGJpnLs1LHt64F6dpPQ= X-Google-Smtp-Source: AGHT+IH5l9P4F+jp9aAtqOgrYs/hhNkgB4cL8zF7xwP/ScnbovR92IAzkKRKsd83JTy/hPg/McBha0OQ5cPM85j6BOzs5ne8jX1d Precedence: bulk X-Mailing-List: linux-ext4@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:19ce:b0:412:fa25:dd4e with SMTP id e9e14a558f8ab-4209d40ff57mr76176315ab.1.1757776890614; Sat, 13 Sep 2025 08:21:30 -0700 (PDT) Date: Sat, 13 Sep 2025 08:21:30 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68c58bfa.050a0220.3c6139.04d2.GAE@google.com> Subject: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data (3) 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: 5f540c4aade9 Add linux-next specific files for 20250910 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=10025d62580000 kernel config: https://syzkaller.appspot.com/x/.config?x=5ed48faa2cb8510d dashboard link: https://syzkaller.appspot.com/bug?extid=f3185be57d7e8dda32b8 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/df0dfb072f52/disk-5f540c4a.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/20649042ae30/vmlinux-5f540c4a.xz kernel image: https://storage.googleapis.com/syzbot-assets/4c16358268b8/bzImage-5f540c4a.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f3185be57d7e8dda32b8@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ext4/inline.c:240! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 28152 Comm: syz.8.5004 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:ext4_write_inline_data+0x43c/0x440 fs/ext4/inline.c:240 Code: c1 38 c1 0f 8c 19 ff ff ff 48 89 df 49 89 d7 e8 fa c8 b0 ff 4c 89 fa e9 06 ff ff ff e8 7d c2 4c ff 90 0f 0b e8 75 c2 4c ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f RSP: 0018:ffffc900045273a8 EFLAGS: 00010287 RAX: ffffffff8272facb RBX: 0000000000003000 RCX: 0000000000080000 RDX: ffffc90016e08000 RSI: 0000000000001d1a RDI: 0000000000001d1b RBP: ffff888012035472 R08: ffff88807cd4e387 R09: 1ffff1100f9a9c70 R10: dffffc0000000000 R11: ffffed100f9a9c71 R12: 000000000000003c R13: ffffc90004527460 R14: 0000000000002000 R15: ffff888012034f18 FS: 00007f73a18866c0(0000) GS:ffff8881259f0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30511ff8 CR3: 0000000049be6000 CR4: 00000000003526f0 Call Trace: ext4_write_inline_data_end+0x336/0xab0 fs/ext4/inline.c:807 generic_perform_write+0x627/0x900 mm/filemap.c:4230 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:299 ext4_file_write_iter+0x298/0x1bc0 fs/ext4/file.c:-1 iter_file_splice_write+0x972/0x10e0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0xfe/0x160 fs/splice.c:1161 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x181/0x270 fs/splice.c:1230 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f73a098eba9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f73a1886038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f73a0bd5fa0 RCX: 00007f73a098eba9 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000004 RBP: 00007f73a0a11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f73a0bd6038 R14: 00007f73a0bd5fa0 R15: 00007ffcafa37c38 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_write_inline_data+0x43c/0x440 fs/ext4/inline.c:240 Code: c1 38 c1 0f 8c 19 ff ff ff 48 89 df 49 89 d7 e8 fa c8 b0 ff 4c 89 fa e9 06 ff ff ff e8 7d c2 4c ff 90 0f 0b e8 75 c2 4c ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f RSP: 0018:ffffc900045273a8 EFLAGS: 00010287 RAX: ffffffff8272facb RBX: 0000000000003000 RCX: 0000000000080000 RDX: ffffc90016e08000 RSI: 0000000000001d1a RDI: 0000000000001d1b RBP: ffff888012035472 R08: ffff88807cd4e387 R09: 1ffff1100f9a9c70 R10: dffffc0000000000 R11: ffffed100f9a9c71 R12: 000000000000003c R13: ffffc90004527460 R14: 0000000000002000 R15: ffff888012034f18 FS: 00007f73a18866c0(0000) GS:ffff8881259f0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8fb8e97d58 CR3: 0000000049be6000 CR4: 00000000003526f0 --- 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 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