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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3EB4ECAAA3 for ; Fri, 26 Aug 2022 19:02:36 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 299C6940008; Fri, 26 Aug 2022 15:02:36 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 22268940007; Fri, 26 Aug 2022 15:02:36 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 09DA5940008; Fri, 26 Aug 2022 15:02:36 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id EC848940007 for ; Fri, 26 Aug 2022 15:02:35 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id C36CE1602BB for ; Fri, 26 Aug 2022 19:02:35 +0000 (UTC) X-FDA: 79842665070.17.082267A Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) by imf01.hostedemail.com (Postfix) with ESMTP id 6EFD240015 for ; Fri, 26 Aug 2022 19:02:35 +0000 (UTC) Received: by mail-il1-f199.google.com with SMTP id n13-20020a056e02140d00b002dfa5464967so1758819ilo.19 for ; Fri, 26 Aug 2022 12:02:35 -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; bh=dq5VkqjfDnwWLl/bsXasVEegglasUUDpYrJ8qiZGvfU=; b=0jgZDdmP+Byvh/o3KyaFfAOjvQENfQITaMTlzlq9XT9WFJ+Eff2J8R22rGd0RhuVff +4Yu4XamyBr5oiqm/sDZUQNQOxJkoTdYOju6BnZYgougglN+OH+9iEJ07ybBwGZpwEN0 WqUxCTsN/boCUFZvjzrpCGBervM/qRwqjW6qBQQyfIgc5u0zAZZeAPnobchGPW72IFf+ A6aer1WRpvyUOKhWMMJT84F0CSRSETfXkdUc66Sgq3v/PFv3w2UzV8B0LpyJ/jrX574L c3+LDym6PYJXI7x3DBHXlrzf6u5TGT/TFvZn6c9KaIwoMAXXulWBlcgfpthkmXeopqub lw3Q== X-Gm-Message-State: ACgBeo10Yn9nRaqrtn/+5EwM5ZsSfrh9jmmAq+7MRnd5ycsoVJek5rdw Fi2vQ/OI3If1vwWoXyY6UTjLnSw1AlFyIj7uUCCWbbn5/CHN X-Google-Smtp-Source: AA6agR7sf7ZBSqvlIc2tOb7t/wHMmhB/lfBoygiWWaHxWN7e36f0wmiKls7yee9YOFkHWyaDrSb2MeNbK2RPW4n+4wvc/RgZ6rR0 MIME-Version: 1.0 X-Received: by 2002:a92:cd8f:0:b0:2df:ff82:2e5f with SMTP id r15-20020a92cd8f000000b002dfff822e5fmr4777330ilb.72.1661540554818; Fri, 26 Aug 2022 12:02:34 -0700 (PDT) Date: Fri, 26 Aug 2022 12:02:34 -0700 In-Reply-To: <000000000000d5b4fe05e7127662@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000008cccea05e7298e1f@google.com> Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in set_page_dirty From: syzbot To: akpm@linux-foundation.org, chao@kernel.org, jaegeuk@kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com, willy@infradead.org Content-Type: text/plain; charset="UTF-8" ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661540555; a=rsa-sha256; cv=none; b=GWoVizRNuSVJ2u1tsWfBCTU8EFzXd046GpwqeVXI/fQZqgEb9oe9gEu4xw2scCa7z2ERZG d7f9EsEGyml9JVCJFUKDTmCiJArCv7EG8PRqbYodLnjU7pOzKmbQfWj7rBMa5SZIn49XQh f4iT+/UtbGSB+uAB5tRJlAPeBvmhX5Y= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf01.hostedemail.com: domain of 3yhgJYwkbAD8tz0lbmmfsbqqje.hpphmfvtfsdpoufou.dpn@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.199 as permitted sender) smtp.mailfrom=3yhgJYwkbAD8tz0lbmmfsbqqje.hpphmfvtfsdpoufou.dpn@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661540555; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references; bh=dq5VkqjfDnwWLl/bsXasVEegglasUUDpYrJ8qiZGvfU=; b=SBCN2tZ8+lxlb9i1vEUo9afG5U8Jsh1HRCMIRREaK4RrlUpbZTlDnzib+x1Ly3xkV5yiwn maCRvSsZDQWShLOm06WEwdR2YThKoHny92hqNsl7xXcR+CU/E5pKoWTenAmg/OwH8jsZuk Ne7xkrUrB0UOolRaNZuQGtwCEn4l4Kk= X-Rspamd-Server: rspam11 X-Rspam-User: X-Rspamd-Queue-Id: 6EFD240015 Authentication-Results: imf01.hostedemail.com; dkim=none; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=appspotmail.com (policy=none); spf=pass (imf01.hostedemail.com: domain of 3yhgJYwkbAD8tz0lbmmfsbqqje.hpphmfvtfsdpoufou.dpn@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com designates 209.85.166.199 as permitted sender) smtp.mailfrom=3yhgJYwkbAD8tz0lbmmfsbqqje.hpphmfvtfsdpoufou.dpn@M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com X-Stat-Signature: cxisq1qjuq6d3n64jiuqhciyp1x611ow X-HE-Tag: 1661540555-72036 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: syzbot has found a reproducer for the following issue on: HEAD commit: a41a877bc12d Merge branch 'for-next/fixes' 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=104eb875080000 kernel config: https://syzkaller.appspot.com/x/.config?x=5cea15779c42821c dashboard link: https://syzkaller.appspot.com/bug?extid=775a3440817f74fddb8c 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=15aebce7080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=167b5e33080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+775a3440817f74fddb8c@syzkaller.appspotmail.com Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 Mem abort info: ESR = 0x0000000086000004 EC = 0x21: IABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault user pgtable: 4k pages, 48-bit VAs, pgdp=0000000109ee4000 [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 86000004 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 3045 Comm: syz-executor330 Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : 0x0 lr : folio_mark_dirty+0xbc/0x208 mm/page-writeback.c:2748 sp : ffff800012783970 x29: ffff800012783970 x28: 0000000000000000 x27: ffff800012783b08 x26: 0000000000000001 x25: 0000000000000400 x24: 0000000000000001 x23: ffff0000c736e000 x22: 0000000000000045 x21: 05ffc00000000015 x20: ffff0000ca7403b8 x19: fffffc00032ec600 x18: 0000000000000181 x17: ffff80000c04d6bc x16: ffff80000dbb8658 x15: 0000000000000000 x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 x11: ff808000083e9814 x10: 0000000000000000 x9 : ffff8000083e9814 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff0000cbb19000 x4 : ffff0000cb3d2000 x3 : ffff0000cbb18f80 x2 : fffffffffffffff0 x1 : fffffc00032ec600 x0 : ffff0000ca7403b8 Call trace: 0x0 set_page_dirty+0x38/0xbc mm/folio-compat.c:62 f2fs_update_meta_page+0x80/0xa8 fs/f2fs/segment.c:2369 do_checkpoint+0x794/0xea8 fs/f2fs/checkpoint.c:1522 f2fs_write_checkpoint+0x3b8/0x568 fs/f2fs/checkpoint.c:1679 f2fs_issue_checkpoint+0x1b0/0x234 f2fs_sync_fs+0x8c/0xc8 fs/f2fs/super.c:1651 sync_filesystem+0xe0/0x134 fs/sync.c:66 generic_shutdown_super+0x38/0x190 fs/super.c:474 kill_block_super+0x30/0x78 fs/super.c:1427 kill_f2fs_super+0x140/0x184 fs/f2fs/super.c:4544 deactivate_locked_super+0x70/0xd4 fs/super.c:332 deactivate_super+0xb8/0xbc fs/super.c:363 cleanup_mnt+0x1f8/0x234 fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0xc4/0x208 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x174/0x1d0 arch/arm64/kernel/signal.c:1127 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x150 arch/arm64/kernel/entry-common.c:625 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: bad PC value ---[ end trace 0000000000000000 ]---