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=-0.4 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 C2AADC4321E for ; Fri, 7 Sep 2018 15:17:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77B332083D for ; Fri, 7 Sep 2018 15:17:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77B332083D 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 vger.kernel.org via listexpand id S1729337AbeIGT60 (ORCPT ); Fri, 7 Sep 2018 15:58:26 -0400 Received: from mail-it0-f72.google.com ([209.85.214.72]:39603 "EHLO mail-it0-f72.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728232AbeIGT6Z (ORCPT ); Fri, 7 Sep 2018 15:58:25 -0400 Received: by mail-it0-f72.google.com with SMTP id w196-v6so21428999itb.4 for ; Fri, 07 Sep 2018 08:17:03 -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=DNzmUfvkDuPUSJVbtE9N1pOPE18PwvNhfgYozoarG2g=; b=DP3XKfLYEXGD4sgzP7Nt+Z8a9zwA+AWYLVBJn8DPIrU/YPYJDWiQvUggjZdAng+yme UE1HZZ9/dg+t8J4yMPZpeORliUCgaLbNofIVfcDqNyVDX8wLkn7Drp0ZJw3dtlCuJ1sg DwnPQCitT8Of6nbruCS2PeC1EoljQBo/BWaUt9Sn4Uqja2KZ3LvuzO1tvkjc2AtswdL5 PqDFEf1C9U9s6Wp8jw64aHncHA9tS5CofzHbxzbCTnijlVzIg2USPO13sRHm27wnVR3Z HcfUqi+DtZmm9TuezHpJbxH6k36y5mcMoFXDoHt1rm5a6YdIpWMqzNXH39D8aYZvZvci m62Q== X-Gm-Message-State: APzg51DNpalRmiTdnphkeVSYB5MFo7Kq/BbwXyVcZrM/j63jjEY/zoda tkLgbJ01VVl7Rc/boP5G5OrOUvHNF0kMfMjDSgO8CAXATBGE X-Google-Smtp-Source: ANB0Vda7P43UHOuWPooPmQHq1yScy9A+3441o1eYlxChxJbQC5cpVPt+yA8oiTgcZCBLeTcRyp06+xjaczzNShCsXrKa7m/M02I6 MIME-Version: 1.0 X-Received: by 2002:a5e:c20a:: with SMTP id v10-v6mr6743109iop.100.1536333422893; Fri, 07 Sep 2018 08:17:02 -0700 (PDT) Date: Fri, 07 Sep 2018 08:17:02 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000edab9e0575497f40@google.com> Subject: BUG: bad usercopy in __check_object_size (2) From: syzbot To: hpa@zytor.com, linux-kernel@vger.kernel.org, luto@kernel.org, mingo@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org 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 Hello, syzbot found the following crash on: HEAD commit: 28619527b8a7 Merge git://git.kernel.org/pub/scm/linux/kern.. git tree: bpf console output: https://syzkaller.appspot.com/x/log.txt?x=1618ac21400000 kernel config: https://syzkaller.appspot.com/x/.config?x=62e9b447c16085cf dashboard link: https://syzkaller.appspot.com/bug?extid=a3c9d2673837ccc0f22b compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a3c9d2673837ccc0f22b@syzkaller.appspotmail.com do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 usercopy: Kernel memory overwrite attempt detected to spans multiple pages (offset 0, size 64)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 15327 Comm: syz-executor2 Not tainted 4.19.0-rc2+ #50 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90 Code: c0 e8 8a 23 b2 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 80 48 15 88 ff 75 d0 41 57 e8 5a 38 98 ff <0f> 0b e8 5f 23 b2 ff e8 8a 6e f5 ff 8b 95 5c fe ff ff 4d 89 e0 31 RSP: 0018:ffff88019c5ced40 EFLAGS: 00010082 RAX: 000000000000005f RBX: ffffffff881545a0 RCX: ffffc9000728f000 RDX: 0000000000000000 RSI: ffffffff8164f825 RDI: 0000000000000005 RBP: ffff88019c5ced98 R08: ffff8801a3dd23c0 R09: ffffed003b5c3ee2 R10: ffffed003b5c3ee2 R11: ffff8801dae1f717 R12: ffffffff88154ac0 R13: ffffffff881546e0 R14: ffffffff881545a0 R15: ffffffff881545a0 FS: 00007ff971688700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cb25000 CR3: 00000001d38c1000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: check_page_span mm/usercopy.c:212 [inline] check_heap_object mm/usercopy.c:241 [inline] __check_object_size.cold.2+0x23/0x134 mm/usercopy.c:266 check_object_size include/linux/thread_info.h:119 [inline] __copy_from_user_inatomic include/linux/uaccess.h:65 [inline] __probe_kernel_read+0xda/0x1c0 mm/maccess.c:33 show_opcodes+0x4c/0x70 arch/x86/kernel/dumpstack.c:109 show_ip+0x31/0x36 arch/x86/kernel/dumpstack.c:126 show_iret_regs+0x14/0x38 arch/x86/kernel/dumpstack.c:131 __show_regs+0x1c/0x60 arch/x86/kernel/process_64.c:72 show_regs_if_on_stack.constprop.10+0x36/0x39 arch/x86/kernel/dumpstack.c:149 show_trace_log_lvl+0x25d/0x28c arch/x86/kernel/dumpstack.c:274 show_stack+0x38/0x3a arch/x86/kernel/dumpstack.c:293 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149 __should_failslab+0x124/0x180 mm/failslab.c:32 should_failslab+0x9/0x14 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slab.c:3299 [inline] kmem_cache_alloc_node_trace+0x5a/0x740 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x33/0x70 mm/slab.c:3696 __kmalloc_reserve.isra.39+0x41/0xe0 net/core/skbuff.c:137 __alloc_skb+0x155/0x770 net/core/skbuff.c:205 alloc_skb_fclone include/linux/skbuff.h:1037 [inline] tipc_buf_acquire+0x2d/0xf0 net/tipc/msg.c:66 named_prepare_buf+0x8d/0x4b0 net/tipc/name_distr.c:71 tipc_named_publish+0x433/0xa80 net/tipc/name_distr.c:99 tipc_nametbl_publish+0x702/0xbb0 net/tipc/name_table.c:630 tipc_sk_publish+0x236/0x530 net/tipc/socket.c:2604 tipc_sk_join net/tipc/socket.c:2779 [inline] tipc_setsockopt+0x613/0xd70 net/tipc/socket.c:2883 __sys_setsockopt+0x1ba/0x3c0 net/socket.c:1900 __do_sys_setsockopt net/socket.c:1911 [inline] __se_sys_setsockopt net/socket.c:1908 [inline] __x64_sys_setsockopt+0xbe/0x150 net/socket.c:1908 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457099 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff971687c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007ff9716886d4 RCX: 0000000000457099 RDX: 0000000000000087 RSI: 000000000000010f RDI: 0000000000000006 RBP: 0000000000930140 R08: 000000000000013f R09: 0000000000000000 R10: 0000000020000180 R11: 0000000000000246 R12: 0000000000000005 R13: 00000000004d6570 R14: 00000000004c9ad7 R15: 0000000000000009 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace d7af0d687a56e2e0 ]--- RIP: 0010:usercopy_abort+0xbb/0xbd mm/usercopy.c:90 Code: c0 e8 8a 23 b2 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 80 48 15 88 ff 75 d0 41 57 e8 5a 38 98 ff <0f> 0b e8 5f 23 b2 ff e8 8a 6e f5 ff 8b 95 5c fe ff ff 4d 89 e0 31 RSP: 0018:ffff88019c5ced40 EFLAGS: 00010082 RAX: 000000000000005f RBX: ffffffff881545a0 RCX: ffffc9000728f000 RDX: 0000000000000000 RSI: ffffffff8164f825 RDI: 0000000000000005 RBP: ffff88019c5ced98 R08: ffff8801a3dd23c0 R09: ffffed003b5c3ee2 R10: ffffed003b5c3ee2 R11: ffff8801dae1f717 R12: ffffffff88154ac0 R13: ffffffff881546e0 R14: ffffffff881545a0 R15: ffffffff881545a0 FS: 00007ff971688700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2cb25000 CR3: 00000001d38c1000 CR4: 00000000001406f0 DR0: 00000000200001c0 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 --- This bug is generated by a bot. 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