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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 85759C43441 for ; Sun, 11 Nov 2018 23:42:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4ED0920818 for ; Sun, 11 Nov 2018 23:42:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4ED0920818 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by 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X-Gm-Message-State: AGRZ1gKULk7yBRFNem8xPSWB/s5ykjAhtuGtbU2hsxHAQbrr6X4pbVms JGGMRQL0wXvFKmn2/mgLsUP7MQR1tTvxwKPmlgjk3vFph3l+ X-Google-Smtp-Source: AJdET5cNCBiwlHLzmBGwNcg0vGswyQFaeA3/bddrdkd17HQc9G0FNK76Ws2hL/3EuVfAhzsa2Y6bWv/SQ9LAgegzEqOEHlG1mRBl MIME-Version: 1.0 X-Received: by 2002:a24:59d1:: with SMTP id p200-v6mr9147477itb.10.1541979723571; Sun, 11 Nov 2018 15:42:03 -0800 (PST) Date: Sun, 11 Nov 2018 15:42:03 -0800 In-Reply-To: <00000000000014008b057a598671@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000acaa9e057a6c21c6@google.com> Subject: Re: general protection fault in vb2_mmap From: syzbot To: kyungmin.park@samsung.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, m.szyprowski@samsung.com, mchehab@kernel.org, pawel@osciak.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has found a reproducer for the following crash on: HEAD commit: 442b8cea2477 Add linux-next specific files for 20181109 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=15c7654d400000 kernel config: https://syzkaller.appspot.com/x/.config?x=2f72bdb11df9fbe8 dashboard link: https://syzkaller.appspot.com/bug?extid=52e5bf0ebfa66092937a compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1492dfbd400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16d6e6d5400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+52e5bf0ebfa66092937a@syzkaller.appspotmail.com 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: 1 PID: 6333 Comm: syz-executor804 Not tainted 4.20.0-rc1-next-20181109+ #110 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa RSP: 0018:ffff8801c111f7d0 EFLAGS: 00010203 RAX: 0000000000000002 RBX: 000000000000000a RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 RBP: ffff8801c111f820 R08: ffff8801c23e8400 R09: ffffed0039c39966 R10: ffffed0039c39966 R11: ffff8801ce1ccb37 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000020a00000 R15: ffff8801cb777268 FS: 00000000020b8880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000006cf090 CR3: 00000001b531c000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vb2_fop_mmap+0x4b/0x70 drivers/media/common/videobuf2/videobuf2-v4l2.c:999 v4l2_mmap+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:401 call_mmap include/linux/fs.h:1872 [inline] mmap_region+0xe85/0x1cd0 mm/mmap.c:1786 do_mmap+0xa22/0x1230 mm/mmap.c:1559 do_mmap_pgoff include/linux/mm.h:2328 [inline] vm_mmap_pgoff+0x213/0x2c0 mm/util.c:350 ksys_mmap_pgoff+0x4da/0x660 mm/mmap.c:1609 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:91 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:91 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x444c09 Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 2b ce fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff3df375f8 EFLAGS: 00000212 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444c09 RDX: 00000000ffffffff RSI: 0000000000600000 RDI: 0000000020a00000 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000020a00000 R10: 0000000000000011 R11: 0000000000000212 R12: 000000000000977e R13: 0000000000401f50 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace eab0c06c6f6dccfa ]--- RIP: 0010:__find_plane_by_offset drivers/media/common/videobuf2/videobuf2-core.c:2006 [inline] RIP: 0010:vb2_mmap+0x23c/0x6f0 drivers/media/common/videobuf2/videobuf2-core.c:2128 Code: 80 3c 10 00 0f 85 1b 04 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 45 b8 48 8b 00 48 8d 78 14 48 89 45 d0 48 89 f8 48 c1 e8 03 <0f> b6 14 08 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa RSP: 0018:ffff8801c111f7d0 EFLAGS: 00010203 RAX: 0000000000000002 RBX: 000000000000000a RCX: dffffc0000000000 RDX: dffffc0000000000 RSI: ffffffff854c01c0 RDI: 0000000000000014 RBP: ffff8801c111f820 R08: ffff8801c23e8400 R09: ffffed0039c39966 R10: ffffed0039c39966 R11: ffff8801ce1ccb37 R12: 0000000000000000 R13: 0000000000000001 R14: 0000000020a00000 R15: ffff8801cb777268 FS: 00000000020b8880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000414ca0 CR3: 00000001b531c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400