From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oa1-f80.google.com (mail-oa1-f80.google.com [209.85.160.80]) (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 3679628F5 for ; Sat, 11 Jul 2026 01:29:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.160.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783733377; cv=none; b=UAsHWsOKhBqNlg5tagsXH9nB/vPkEWI7i61Ah9IaGa3r/HJnMCNWF12MQ5ssMJf5e+zaf14nHQOmRC1tilGquWLHF7yQPJ2jNA3WmPi3fvoDaAlXS2qvMzM/yaZ9cVyrELmZhASUwmT7pgtXZ12xYgY9Hk1o878Qd3fXF+FySFI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783733377; c=relaxed/simple; bh=bZ8vSwKapDpmEcMHkBO+peiSiS2E/XgcrTa5VImBMGs=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=cnvbCszreuVnuIcpyNUCHs/4TfNfhAdMLkkVPemH/JgFQJUb2RPwQPe/B2KT4zFJNep9vzg961pvkCXaks26zSIdzXTF4lcsSaYsc4nxFBQYObGNzNOKUP6b+l/atIpJAo+vKRvo2Vj2w9nzipRhZ5miZd3ZGDFgV8Si/6xwwQg= 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=209.85.160.80 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-oa1-f80.google.com with SMTP id 586e51a60fabf-448bb8bcf38so1258602fac.1 for ; Fri, 10 Jul 2026 18:29:35 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783733375; x=1784338175; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=/O3+zFLYKutGnfLXu3OIZFsMm9QJilupY1FpO0OjtrY=; b=Li/YmONrGXzglfnU61jNzR8VhJLIHWEnarcAEsihfc6U3gWa04Gd8aJgfrqq40+r/u gCLY+VYJUP0aU/yvIAedRHS2Z6TdW96zv+gtNrZyOLDwerpDZoMY7V5SurFbAXqiKtok 3byeKHFyJHSXcRvgODCqCsJosDcqH4p54Z/lDJvoiLxbmvg1sMIm8LkxHohdKU69pDvd Us4gzNAm7agk3Mw1CTIBp0OlQOqVfu95eRKLOzY6s49q9u6cT9EylXPHr0AV9m1t+cK/ /jB+p/32k5QEqftwgjWVY1Q6agn4QsJUNz+9YZsKYBFioQQRndh5y8Z7uIc75pRa+i9A MrLg== X-Forwarded-Encrypted: i=1; AFNElJ8gx8BfXITolaXZd5QFiWOLMbiJWaN9+3o0+utPhwKGLcLKLueYZkgcxa80BuzQJh80Qo+ocyrvk/hRyKk=@vger.kernel.org X-Gm-Message-State: AOJu0Yx4Y0IJOevIdjtbDYQiaQ6ZRLV0tohgb3xWYYrfHM+tYNW5UeMO g3tUtoBDbhuuvAv9RMRuL5/tU5rL6Y61J3NFEOKScpjeXJcwM9qZzRAhYs97LzSD7YtBFZ8a7Kk 1dkYzzhPkHUSspw550nGzocTmOn/86pcVbUWhNWl9y/p2D3rsAuN6VmYuOpg= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:2387:b0:497:e7e2:756e with SMTP id 5614622812f47-4a42aca9d0emr1052338b6e.13.1783733375235; Fri, 10 Jul 2026 18:29:35 -0700 (PDT) Date: Fri, 10 Jul 2026 18:29:35 -0700 In-Reply-To: <6a27cb2a.39669fcc.33b062.008b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a519c7f.278cdcd2.e885.000c.GAE@google.com> Subject: Re: [syzbot] [ext4?] kernel BUG in ext4_write_inline_data (5) From: syzbot To: adilger.kernel@dilger.ca, jack@suse.cz, libaokun@linux.alibaba.com, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, ojaswin@linux.ibm.com, ritesh.list@gmail.com, syzkaller-bugs@googlegroups.com, tytso@mit.edu, yi.zhang@huawei.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: a635d6748234 Merge tag 'v7.2-rc2-smb3-server-fixes' of git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10c8b0b9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=8578cb30af0c1c29 dashboard link: https://syzkaller.appspot.com/bug?extid=53c8bd6136cfbe85197e 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=12d41346580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/5cfb3b35578d/disk-a635d674.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4f49a13f1718/vmlinux-a635d674.xz kernel image: https://storage.googleapis.com/syzbot-assets/1c79dac0ba82/bzImage-a635d674.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/e19a0b652c4c/mount_0.gz fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=125ac0b9580000) IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+53c8bd6136cfbe85197e@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/ext4/inline.c:240! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 6277 Comm: syz.5.64 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:ext4_write_inline_data+0x40b/0x4f0 fs/ext4/inline.c:240 Code: fe e8 e9 e7 36 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 e7 36 ff 90 0f 0b e8 c6 e7 36 ff 90 <0f> 0b e8 be e7 36 ff 48 8d 3d f7 52 56 0e 48 c7 c2 e0 95 ed 8b 4c RSP: 0018:ffffc90003d7f8e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000078 RCX: ffffffff82d2c53b RDX: ffff8880280cdd00 RSI: ffffffff82d2c75a RDI: ffff8880280cdd00 RBP: ffff88807127e000 R08: 0000000000000006 R09: 0000000000000080 R10: 000000000000003c R11: 0000000000000000 R12: 0000000000000008 R13: 0000000000000080 R14: ffffc90003d7f980 R15: ffff88807127e58a FS: 00007f45fb4396c0(0000) GS:ffff888123eed000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff59e5b7000 CR3: 000000007855a000 CR4: 0000000000350ef0 Call Trace: ext4_write_inline_data_end+0x2a8/0xdb0 fs/ext4/inline.c:825 ext4_da_write_end+0x51e/0xe70 fs/ext4/inode.c:3305 generic_perform_write+0x513/0xa40 mm/filemap.c:4379 ext4_buffered_write_iter+0xdc/0x3b0 fs/ext4/file.c:316 ext4_file_write_iter+0xa2f/0x1cb0 fs/ext4/file.c:735 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f45fa59de59 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:00007f45fb439028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f45fa825fa0 RCX: 00007f45fa59de59 RDX: 0000000000000078 RSI: 00002000000000c0 RDI: 0000000000000004 RBP: 00007f45fa633e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f45fa826038 R14: 00007f45fa825fa0 R15: 00007fff8e2c70e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ext4_write_inline_data+0x40b/0x4f0 fs/ext4/inline.c:240 Code: fe e8 e9 e7 36 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 e7 36 ff 90 0f 0b e8 c6 e7 36 ff 90 <0f> 0b e8 be e7 36 ff 48 8d 3d f7 52 56 0e 48 c7 c2 e0 95 ed 8b 4c RSP: 0018:ffffc90003d7f8e0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000078 RCX: ffffffff82d2c53b RDX: ffff8880280cdd00 RSI: ffffffff82d2c75a RDI: ffff8880280cdd00 RBP: ffff88807127e000 R08: 0000000000000006 R09: 0000000000000080 R10: 000000000000003c R11: 0000000000000000 R12: 0000000000000008 R13: 0000000000000080 R14: ffffc90003d7f980 R15: ffff88807127e58a FS: 00007f45fb4396c0(0000) GS:ffff888123ded000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff59e5b6000 CR3: 000000007855a000 CR4: 0000000000350ef0 --- 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.