From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Date: Fri, 05 Oct 2018 11:16:03 +0000 Subject: kernel BUG at security/keys/keyring.c:LINE! Message-Id: <000000000000a722550577796543@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset="windows-1250" Content-Transfer-Encoding: base64 List-Id: To: dhowells@redhat.com, jmorris@namei.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, serge@hallyn.com, syzkaller-bugs@googlegroups.com SGVsbG8sCgpzeXpib3QgZm91bmQgdGhlIGZvbGxvd2luZyBjcmFzaCBvbjoKCkhFQUQgY29tbWl0 OiAgICBiZWZhZDk0NGUyMzEgTWVyZ2UgdGFnICdkcm0tZml4ZXMtMjAxOC0xMC0wNScgb2YgZ2l0 Oi8vYW5vLi4KZ2l0IHRyZWU6ICAgICAgIHVwc3RyZWFtCmNvbnNvbGUgb3V0cHV0OiBodHRwczov L3N5emthbGxlci5hcHBzcG90LmNvbS94L2xvZy50eHQ/eBYxZmM5NzY0MDAwMDAKa2VybmVsIGNv bmZpZzogIGh0dHBzOi8vc3l6a2FsbGVyLmFwcHNwb3QuY29tL3gvLmNvbmZpZz94wGFmMDNmZTQ1 MmI2NWZiCmRhc2hib2FyZCBsaW5rOiBodHRwczovL3N5emthbGxlci5hcHBzcG90LmNvbS9idWc/ ZXh0aWTsMjRlOTVlYTQ4M2RlMGEyNGRhCmNvbXBpbGVyOiAgICAgICBnY2MgKEdDQykgOC4wLjEg MjAxODA0MTMgKGV4cGVyaW1lbnRhbCkKc3l6IHJlcHJvOiAgICAgIGh0dHBzOi8vc3l6a2FsbGVy 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Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-security-module-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728026AbeJESOY (ORCPT ); Fri, 5 Oct 2018 14:14:24 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:37643 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727775AbeJESOX (ORCPT ); Fri, 5 Oct 2018 14:14:23 -0400 Received: by mail-it1-f198.google.com with SMTP id y73-v6so1806322ita.2 for ; Fri, 05 Oct 2018 04:16:04 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=bfI6tb5oXUKp8s/NPXz7svkxBNqeUYarmEygSX5sI0g=; b=HW1zXMcLcKfLush72Olk7PgJLFyIhLpX619NPbw80zSr3qrRNRovFun1XF4uLK2rVY XFAQ67b+YqltJ+AX+cW+CFQGx9VbvPYOxGfrDWyc/DNQ6tk49IrB3PIZXkbyO3fn+v4a rHUpl17YiCSFHDLM/HTyBgBnkzjk+JesvE9I0sUGy1NWAPYWSEesoIn8F0lruNMAX8ut 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From: syzbot To: dhowells@redhat.com, jmorris@namei.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, serge@hallyn.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: owner-linux-security-module@vger.kernel.org Precedence: bulk List-ID: Hello, syzbot found the following crash on: HEAD commit: befad944e231 Merge tag 'drm-fixes-2018-10-05' of git://ano.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=161fc976400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c0af03fe452b65fb dashboard link: https://syzkaller.appspot.com/bug?extid=ec24e95ea483de0a24da compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10160e3a400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16995491400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+ec24e95ea483de0a24da@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at security/keys/keyring.c:1214! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5807 Comm: syz-executor226 Not tainted 4.19.0-rc6+ #268 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__key_link_begin+0x23a/0x300 security/keys/keyring.c:1214 Code: fe 48 c7 c7 20 ae 67 89 e8 b3 36 23 fe eb ac e8 ec 64 42 fe 48 c7 c7 20 ae 67 89 e8 30 73 73 04 e9 e3 fe ff ff e8 d6 64 42 fe <0f> 0b e8 cf 64 42 fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8801bbdc7b10 EFLAGS: 00010293 RAX: ffff8801d924e2c0 RBX: ffff8801d4e7e080 RCX: ffffffff833c4ebf RDX: 0000000000000000 RSI: ffffffff833c50aa RDI: 0000000000000007 RBP: ffff8801bbdc7b40 R08: ffff8801d924e2c0 R09: fffffbfff12cf4a4 R10: fffffbfff12cf4a4 R11: ffffffff8967a523 R12: ffff8801bbdc7c48 R13: 0000000000000000 R14: ffff8801d4e7e200 R15: ffff8801d4e7e080 FS: 0000000001ce9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020cab000 CR3: 00000001d829a000 CR4: 00000000001406f0 Call Trace: construct_alloc_key security/keys/request_key.c:389 [inline] construct_key_and_link security/keys/request_key.c:480 [inline] request_key_and_link+0x737/0x17a0 security/keys/request_key.c:593 __do_sys_request_key security/keys/keyctl.c:213 [inline] __se_sys_request_key security/keys/keyctl.c:158 [inline] __x64_sys_request_key+0x305/0x400 security/keys/keyctl.c:158 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440169 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffd70324808 EFLAGS: 00000217 ORIG_RAX: 00000000000000f9 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440169 RDX: 00000000200001c0 RSI: 0000000020000180 RDI: 00000000200000c0 RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000111522d3 R11: 0000000000000217 R12: 00000000004019f0 R13: 0000000000401a80 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 40815c4a8f1e2472 ]--- RIP: 0010:__key_link_begin+0x23a/0x300 security/keys/keyring.c:1214 Code: fe 48 c7 c7 20 ae 67 89 e8 b3 36 23 fe eb ac e8 ec 64 42 fe 48 c7 c7 20 ae 67 89 e8 30 73 73 04 e9 e3 fe ff ff e8 d6 64 42 fe <0f> 0b e8 cf 64 42 fe 48 8d bb ce 00 00 00 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8801bbdc7b10 EFLAGS: 00010293 RAX: ffff8801d924e2c0 RBX: ffff8801d4e7e080 RCX: ffffffff833c4ebf RDX: 0000000000000000 RSI: ffffffff833c50aa RDI: 0000000000000007 RBP: ffff8801bbdc7b40 R08: ffff8801d924e2c0 R09: fffffbfff12cf4a4 R10: fffffbfff12cf4a4 R11: ffffffff8967a523 R12: ffff8801bbdc7c48 R13: 0000000000000000 R14: ffff8801d4e7e200 R15: ffff8801d4e7e080 FS: 0000000001ce9880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020cab000 CR3: 00000001d829a000 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#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches