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 X-Spam-Level: X-Spam-Status: No, score=-12.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C131FC433F5 for ; Tue, 14 Sep 2021 10:55:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4F9B5610FB for ; Tue, 14 Sep 2021 10:55:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 4F9B5610FB Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=i-love.sakura.ne.jp Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id C1149900002; Tue, 14 Sep 2021 06:55:29 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id BC0C06B0071; Tue, 14 Sep 2021 06:55:29 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id AE1B8900002; Tue, 14 Sep 2021 06:55:29 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0136.hostedemail.com [216.40.44.136]) by kanga.kvack.org (Postfix) with ESMTP id 9DB286B006C for ; Tue, 14 Sep 2021 06:55:29 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 51FAF8249980 for ; Tue, 14 Sep 2021 10:55:29 +0000 (UTC) X-FDA: 78585872778.01.FD78F62 Received: from www262.sakura.ne.jp (www262.sakura.ne.jp [202.181.97.72]) by imf12.hostedemail.com (Postfix) with ESMTP id 48B3510000A0 for ; Tue, 14 Sep 2021 10:55:28 +0000 (UTC) Received: from fsav120.sakura.ne.jp (fsav120.sakura.ne.jp [27.133.134.247]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id 18EAtLY5098916; Tue, 14 Sep 2021 19:55:21 +0900 (JST) (envelope-from penguin-kernel@i-love.sakura.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav120.sakura.ne.jp (F-Secure/fsigk_smtp/550/fsav120.sakura.ne.jp); Tue, 14 Sep 2021 19:55:21 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/550/fsav120.sakura.ne.jp) Received: from [192.168.1.9] (M106072142033.v4.enabler.ne.jp [106.72.142.33]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id 18EAtLbi098913 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NO); Tue, 14 Sep 2021 19:55:21 +0900 (JST) (envelope-from penguin-kernel@i-love.sakura.ne.jp) Subject: Re: [syzbot] riscv/fixes boot error: BUG: unable to handle kernel NULL pointer dereference in corrupted To: syzbot , syzkaller-bugs@googlegroups.com, linux-mm , Michal Hocko , Andrew Morton References: <000000000000c81e6305cbf2319c@google.com> From: Tetsuo Handa Message-ID: Date: Tue, 14 Sep 2021 19:55:20 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 MIME-Version: 1.0 In-Reply-To: <000000000000c81e6305cbf2319c@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Authentication-Results: imf12.hostedemail.com; dkim=none; dmarc=none; spf=none (imf12.hostedemail.com: domain of penguin-kernel@i-love.sakura.ne.jp has no SPF policy when checking 202.181.97.72) smtp.mailfrom=penguin-kernel@i-love.sakura.ne.jp X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: 48B3510000A0 X-Stat-Signature: f81kdxq6xt9eszmus6jfppwhbo6i9doy X-HE-Tag: 1631616928-639884 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hmm, I feel that something is wrong with slub... Any idea? #syz dup: BUG: unable to handle kernel paging request in tomoyo_encode2 On 2021/09/14 19:39, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 7d2a07b76933 Linux 5.14 > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes > console output: https://syzkaller.appspot.com/x/log.txt?x=15cb131b300000 > kernel config: https://syzkaller.appspot.com/x/.config?x=f8211b06020972e8 > dashboard link: https://syzkaller.appspot.com/bug?extid=2a1797e8845b57b4a3c2 > compiler: riscv64-linux-gnu-gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 > userspace arch: riscv64 > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+2a1797e8845b57b4a3c2@syzkaller.appspotmail.com > > Unable to handle kernel NULL pointer dereference at virtual address 0000000000000d48 > Oops [#1] > Modules linked in: > CPU: 1 PID: 2924 Comm: kworker/u4:5 Not tainted 5.14.0-syzkaller #0 > Hardware name: riscv-virtio,qemu (DT) > epc : slab_alloc_node mm/slub.c:2900 [inline] > epc : slab_alloc mm/slub.c:2967 [inline] > epc : __kmalloc+0xce/0x388 mm/slub.c:4111 > ra : slab_pre_alloc_hook mm/slab.h:494 [inline] > ra : slab_alloc_node mm/slub.c:2880 [inline] > ra : slab_alloc mm/slub.c:2967 [inline] > ra : __kmalloc+0x6e/0x388 mm/slub.c:4111 > epc : ffffffff803e3568 ra : ffffffff803e3508 sp : ffffffe008c6f780 > gp : ffffffff83f967d8 tp : ffffffe00b71df00 t0 : ffffffc400b37600 > t1 : 0000000000000001 t2 : 0000000000000000 s0 : ffffffe008c6f820 > s1 : ffffffe005601500 a0 : 0000000000000000 a1 : ffffffe008c6fb6c > a2 : 1ffffffc016e3d07 a3 : 0000000000000d48 a4 : 0000000000000001 > a5 : ffffffff82e4b290 a6 : 0000000000f00000 a7 : ffffffff8038ca52 > s2 : ffffffff83f96adc s3 : 0000000000000d40 s4 : 0000000000000019 > s5 : ffffffff8080a860 s6 : ffffffff83f9a0d0 s7 : 0000000000000000 > s8 : 0000000000000d40 s9 : 0000000000000001 s10: ffffffe005aeb6e0 > s11: 000000000000002f t3 : 4f89673883b77f00 t4 : ffffffc40118df07 > t5 : ffffffc40118df09 t6 : ffffffe0059baffe > status: 0000000000000120 badaddr: 0000000000000d48 cause: 000000000000000d > [] slab_alloc_node mm/slub.c:2900 [inline] > [] slab_alloc mm/slub.c:2967 [inline] > [] __kmalloc+0xce/0x388 mm/slub.c:4111 > [] kmalloc include/linux/slab.h:596 [inline] > [] kzalloc include/linux/slab.h:721 [inline] > [] tomoyo_encode2.part.0+0xf0/0x262 security/tomoyo/realpath.c:45 > [] tomoyo_encode2 security/tomoyo/realpath.c:31 [inline] > [] tomoyo_encode security/tomoyo/realpath.c:80 [inline] > [] tomoyo_realpath_from_path+0x14c/0x3f4 security/tomoyo/realpath.c:288 > [] tomoyo_init_log+0x7a2/0x13aa security/tomoyo/audit.c:263 > [] tomoyo_supervisor+0x1bc/0xb0c security/tomoyo/common.c:2097 > [] tomoyo_audit_env_log security/tomoyo/environ.c:36 [inline] > [] tomoyo_env_perm+0x100/0x120 security/tomoyo/environ.c:63 > [] tomoyo_environ security/tomoyo/domain.c:672 [inline] > [] tomoyo_find_next_domain+0xd24/0x109a security/tomoyo/domain.c:879 > [] tomoyo_bprm_check_security security/tomoyo/tomoyo.c:101 [inline] > [] tomoyo_bprm_check_security+0xdc/0x136 security/tomoyo/tomoyo.c:91 > [] security_bprm_check+0x44/0x96 security/security.c:866 > [] search_binary_handler fs/exec.c:1709 [inline] > [] exec_binprm fs/exec.c:1762 [inline] > [] bprm_execve fs/exec.c:1831 [inline] > [] bprm_execve+0x4ba/0x10a6 fs/exec.c:1793 > [] kernel_execve+0x204/0x288 fs/exec.c:1974 > [] call_usermodehelper_exec_async+0x1bc/0x2d8 kernel/umh.c:112 > [] ret_from_exception+0x0/0x14 > ---[ end trace 77235688c0a8656b ]--- > > > --- > 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. >