From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752082AbeC1GBD (ORCPT ); Wed, 28 Mar 2018 02:01:03 -0400 Received: from mail-io0-f199.google.com ([209.85.223.199]:44878 "EHLO mail-io0-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751147AbeC1GBC (ORCPT ); Wed, 28 Mar 2018 02:01:02 -0400 X-Google-Smtp-Source: AIpwx49mwlpEt6Ibv10v0vG7Dh9cVyvoIW591KObH2BfbEjfYO80oPFoA7UK+5G7/N8j/AYqDPicJdOdJlX1D0wIQtwjyIq4eLqT MIME-Version: 1.0 Date: Tue, 27 Mar 2018 23:01:01 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: Subject: kernel BUG at lib/string.c:LINE! (3) From: syzbot To: dasaratharaman.chandramouli@intel.com, dledford@redhat.com, ira.weiny@intel.com, jgg@ziepe.ca, leonro@mellanox.com, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, parav@mellanox.com, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot hit the following crash on upstream commit 3eb2ce825ea1ad89d20f7a3b5780df850e4be274 (Sun Mar 25 22:44:30 2018 +0000) Linux 4.16-rc7 syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=6800425d54ed3ed8135d So far this crash happened 2 times on upstream. syzkaller reproducer: https://syzkaller.appspot.com/x/repro.syz?id=4538383284043776 Raw console output: https://syzkaller.appspot.com/x/log.txt?id=4665917640278016 Kernel config: https://syzkaller.appspot.com/x/.config?id=-2340295454854568752 compiler: gcc (GCC) 7.1.1 20170620 user-space arch: i386 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6800425d54ed3ed8135d@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. IPVS: ftp: loaded support on port[0] = 21 detected buffer overflow in memcpy ------------[ cut here ]------------ kernel BUG at lib/string.c:1052! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 4211 Comm: syz-executor0 Not tainted 4.16.0-rc7+ #277 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:fortify_panic+0x13/0x20 lib/string.c:1051 RSP: 0018:ffff8801bccaf8f0 EFLAGS: 00010286 RAX: 0000000000000022 RBX: 1ffff10037995f23 RCX: 0000000000000000 RDX: 0000000000000022 RSI: 1ffff10037995ed3 RDI: ffffed0037995f12 RBP: ffff8801bccaf8f0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000000 R12: ffff8801bccaf998 R13: ffff8801bccaf938 R14: ffff8801bccafa58 R15: 000000000000fa00 FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009f8f900 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 0000000008138024 CR3: 00000001ccb50005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy include/linux/string.h:344 [inline] ucma_join_ip_multicast+0x37a/0x3c0 drivers/infiniband/core/ucma.c:1434 ucma_write+0x2d6/0x3d0 drivers/infiniband/core/ucma.c:1649 __vfs_write+0xef/0x970 fs/read_write.c:480 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline] do_fast_syscall_32+0x3ec/0xf9f arch/x86/entry/common.c:392 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7f3ec99 RSP: 002b:00000000ffe9b98c EFLAGS: 00000286 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000040 RDX: 0000000000000038 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: 08 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 89 df e8 b2 e8 e2 fb eb de 55 48 89 fe 48 c7 c7 00 7b 98 86 48 89 e5 e8 55 48 94 fb <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 41 56 RIP: fortify_panic+0x13/0x20 lib/string.c:1051 RSP: ffff8801bccaf8f0 ---[ end trace c61655b171bd6d64 ]--- Kernel panic - not syncing: Fatal exception Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds.. --- This bug is generated by a dumb bot. 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