From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 553D3C38A02 for ; Sat, 29 Oct 2022 12:31:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229520AbiJ2Mbn (ORCPT ); Sat, 29 Oct 2022 08:31:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39776 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229456AbiJ2Mbk (ORCPT ); Sat, 29 Oct 2022 08:31:40 -0400 Received: from mail-io1-f71.google.com (mail-io1-f71.google.com [209.85.166.71]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 08EF04362A for ; Sat, 29 Oct 2022 05:31:39 -0700 (PDT) Received: by mail-io1-f71.google.com with SMTP id v18-20020a5d9412000000b006bfdf74fa3bso5827888ion.3 for ; Sat, 29 Oct 2022 05:31:39 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ym004fsDFgx/zB/z0lLrgOKDV+xptGbFs4Xx7R2vGoI=; b=MnmjFAaYk7nzMJ17DjZkFXxAmmJ8dVhZNz/Mwg0L1UAzkP2xB1dnghlPWdyhxKzEpC AROagarjiswttCU0WuGePTIKf/ImsgwH2JIJlUmnvaQUpjOJsg6OZ51+GQkidaF9s9Lk f1N1gjQwuxHA0yxJIjlrRmeDepJVNRW6zZh4jZiF/9Xr39xrW5sbe8JomiZ+en5W1D1i m58xmYNEdPG+kL7AKsom4JJMX6QGiULguyiHAnczxfWpGWvJ1TB4LWZ3gsqproYADMH4 zx7Dh9xpZXw2RpRSWTuWtPGzs840e4GRzLT3oq0YJ8U2friGI5QCXe0d8p/GB9muTDjG CxEg== X-Gm-Message-State: ACrzQf0CZ9B1IbVxx4XDfDK5z4qjQJMUIc6MccXREaxTROgQ4lRABnx+ udnMY2xlE0C3KrGbINu8fc+fD0wHaZu30Ht1Yn0pLYOwaA1P X-Google-Smtp-Source: AMsMyM6yYj3Ven8dfhoBe0iy5V1zLOBlynZm+KkdUPxMxN8o120+l2MelMhpimtkNiCVBxysKUgEiKbvPrqv6L6CKlXDEe77EA8U MIME-Version: 1.0 X-Received: by 2002:a92:6807:0:b0:300:8bcc:3f48 with SMTP id d7-20020a926807000000b003008bcc3f48mr1897718ilc.5.1667046698366; Sat, 29 Oct 2022 05:31:38 -0700 (PDT) Date: Sat, 29 Oct 2022 05:31:38 -0700 In-Reply-To: <000000000000d1d6c205ebc4d512@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000047be1405ec2b8e4d@google.com> Subject: Re: [syzbot] kernel BUG in nilfs_btnode_create_block From: syzbot To: konishi.ryusuke@gmail.com, linux-kernel@vger.kernel.org, linux-nilfs@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following issue on: HEAD commit: bbed346d5a96 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=15170eb6880000 kernel config: https://syzkaller.appspot.com/x/.config?x=3a4a45d2d827c1e dashboard link: https://syzkaller.appspot.com/bug?extid=b0a35a5c1f7e846d3b09 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=172e12ee880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100e7bce880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e8e91bc79312/disk-bbed346d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c1cb3fb3b77e/vmlinux-bbed346d.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/ba34831a439a/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b0a35a5c1f7e846d3b09@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at fs/nilfs2/btnode.c:59! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3084 Comm: syz-executor420 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : nilfs_btnode_create_block+0x1c0/0x2f8 fs/nilfs2/btnode.c:58 lr : nilfs_btnode_create_block+0x1c0/0x2f8 fs/nilfs2/btnode.c:58 sp : ffff80001285b640 x29: ffff80001285b640 x28: 00000000000a0011 x27: ffff0000caea8498 x26: 00000000000a0011 x25: 0000000000000001 x24: ffff0000caea8498 x23: 000000000000000a x22: 0000000000020011 x21: ffff0000caec0748 x20: 0000000000000927 x19: ffff0000caf52f18 x18: 000000000000009a x17: ffff8001f1d5e000 x16: 0000000000000000 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000406 x12: ffff80000d4551e8 x11: ff80800008634750 x10: 0000000000000000 x9 : 00000000ffffffff x8 : ffff0000caf52f78 x7 : ffff8000083d3920 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000020000 x3 : 000000000000000a x2 : 0000000000000000 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: nilfs_btnode_create_block+0x1c0/0x2f8 fs/nilfs2/btnode.c:58 nilfs_btnode_prepare_change_key+0x138/0x19c fs/nilfs2/btnode.c:219 nilfs_btree_prepare_update_v+0x128/0x17c fs/nilfs2/btree.c:1921 nilfs_btree_prepare_propagate_v fs/nilfs2/btree.c:1988 [inline] nilfs_btree_propagate_v+0x110/0x420 fs/nilfs2/btree.c:2033 nilfs_btree_propagate+0x258/0x350 fs/nilfs2/btree.c:2090 nilfs_bmap_propagate+0x40/0xa8 fs/nilfs2/bmap.c:337 nilfs_collect_file_data+0x34/0xa8 fs/nilfs2/segment.c:568 nilfs_segctor_apply_buffers+0x84/0x168 fs/nilfs2/segment.c:1012 nilfs_segctor_scan_file_dsync fs/nilfs2/segment.c:1101 [inline] nilfs_segctor_collect_blocks+0x1bc/0x93c fs/nilfs2/segment.c:1255 nilfs_segctor_collect fs/nilfs2/segment.c:1497 [inline] nilfs_segctor_do_construct+0x3e4/0xee8 fs/nilfs2/segment.c:2039 nilfs_construct_dsync_segment+0x21c/0x2ec fs/nilfs2/segment.c:2306 nilfs_writepages+0x6c/0xa8 fs/nilfs2/inode.c:170 do_writepages+0x144/0x27c mm/page-writeback.c:2468 filemap_fdatawrite_wbc+0xac/0xd0 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] filemap_write_and_wait_range+0x84/0x1e8 mm/filemap.c:673 __generic_file_write_iter+0x188/0x21c mm/filemap.c:3852 generic_file_write_iter+0x6c/0x168 mm/filemap.c:3898 call_write_iter include/linux/fs.h:2187 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x2dc/0x46c fs/read_write.c:578 ksys_write+0xb4/0x160 fs/read_write.c:631 __do_sys_write fs/read_write.c:643 [inline] __se_sys_write fs/read_write.c:640 [inline] __arm64_sys_write+0x24/0x34 fs/read_write.c:640 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: 14000002 97cd2111 aa1303e0 9400004f (d4210000) ---[ end trace 0000000000000000 ]---