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=-5.4 required=3.0 tests=FROM_LOCAL_DIGITS, FROM_LOCAL_HEX,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 803CAC76188 for ; Mon, 22 Jul 2019 14:38:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 534C121901 for ; Mon, 22 Jul 2019 14:38:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729655AbfGVOiM (ORCPT ); Mon, 22 Jul 2019 10:38:12 -0400 Received: from mail-io1-f72.google.com ([209.85.166.72]:34695 "EHLO mail-io1-f72.google.com" rhost-flags-OK-OK-OK-OK) by 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APXvYqyUB1N5pY0EnPSlqgdjEtIpam0U8WlfKfXbcKl1pqLaLs4moHEgdqRSkU9gPkh6pVmW7vO3kzM9t/xL8F42XYm4xzxTvJFj MIME-Version: 1.0 X-Received: by 2002:a5e:9319:: with SMTP id k25mr43633547iom.137.1563806291177; Mon, 22 Jul 2019 07:38:11 -0700 (PDT) Date: Mon, 22 Jul 2019 07:38:11 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000007bc3a0058e460627@google.com> Subject: general protection fault in make_kuid From: syzbot To: allison@lohutok.net, davem@davemloft.net, gregkh@linuxfoundation.org, jic23@kernel.org, knaack.h@gmx.de, kstewart@linuxfoundation.org, lars@metafoo.de, linus.walleij@linaro.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, mchehab+samsung@kernel.org, nicolas.ferre@microchip.com, paulmck@linux.ibm.com, pmeerw@pmeerw.net, rfontana@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, torvalds@linux-foundation.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 6d21a41b Add linux-next specific files for 20190718 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15200158600000 kernel config: https://syzkaller.appspot.com/x/.config?x=3430a151e1452331 dashboard link: https://syzkaller.appspot.com/bug?extid=7d6a57304857423318a5 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1688da20600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16de4894600000 The bug was bisected to: commit e786741ff1b52769b044b7f4407f39cd13ee5d2d Author: Linus Torvalds Date: Thu Jul 11 22:36:02 2019 +0000 Merge tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16610cf0600000 final crash: https://syzkaller.appspot.com/x/report.txt?x=15610cf0600000 console output: https://syzkaller.appspot.com/x/log.txt?x=11610cf0600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+7d6a57304857423318a5@syzkaller.appspotmail.com Fixes: e786741ff1b5 ("Merge tag 'staging-5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging") kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9000 Comm: syz-executor213 Not tainted 5.2.0-next-20190718 #41 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:map_id_range_down+0x87/0x370 /kernel/user_namespace.c:293 Code: 6e 81 c7 00 f1 f1 f1 f1 c7 40 04 00 04 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 c0 a5 03 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 9f 02 00 00 4c 8b ad 68 ff RSP: 0018:ffff88809a567a30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88809a567aa8 RCX: ffffffff825b97b5 RDX: 0000000000000000 RSI: ffffffff816edf30 RDI: 0000000000000000 RBP: ffff88809a567ad0 R08: ffff88808e4d2600 R09: ffffed1014af1713 R10: ffffed1014af1712 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555618880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000084 CR3: 000000008b2ec000 CR4: 00000000001406f0 Call Trace: map_id_down /kernel/user_namespace.c:312 [inline] make_kuid+0x23/0x30 /kernel/user_namespace.c:389 fuse_parse_param+0x2cb/0x750 /fs/fuse/inode.c:523 vfs_parse_fs_param+0x2ca/0x540 /fs/fs_context.c:145 vfs_parse_fs_string+0x105/0x170 /fs/fs_context.c:188 generic_parse_monolithic+0x181/0x200 /fs/fs_context.c:228 parse_monolithic_mount_data+0x69/0x90 /fs/fs_context.c:708 do_remount /fs/namespace.c:2520 [inline] do_mount+0x924/0x1c30 /fs/namespace.c:3102 ksys_mount+0xdb/0x150 /fs/namespace.c:3320 __do_sys_mount /fs/namespace.c:3334 [inline] __se_sys_mount /fs/namespace.c:3331 [inline] __x64_sys_mount+0xbe/0x150 /fs/namespace.c:3331 do_syscall_64+0xfd/0x6a0 /arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4406e9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffdf71f73c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000007275 RCX: 00000000004406e9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00000000006cb018 R08: 0000000020000300 R09: 65732f636f72702f R10: 0000000000000070 R11: 0000000000000246 R12: 0000000000401fd0 R13: 0000000000402060 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 4fbbc963024437d2 ]--- RIP: 0010:map_id_range_down+0x87/0x370 /kernel/user_namespace.c:293 Code: 6e 81 c7 00 f1 f1 f1 f1 c7 40 04 00 04 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 c0 a5 03 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 74 08 3c 03 0f 8e 9f 02 00 00 4c 8b ad 68 ff RSP: 0018:ffff88809a567a30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88809a567aa8 RCX: ffffffff825b97b5 RDX: 0000000000000000 RSI: ffffffff816edf30 RDI: 0000000000000000 RBP: ffff88809a567ad0 R08: ffff88808e4d2600 R09: ffffed1014af1713 R10: ffffed1014af1712 R11: 0000000000000003 R12: 0000000000000001 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000555555618880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000084 CR3: 000000008b2ec000 CR4: 00000000001406f0 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches