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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS autolearn=unavailable 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 4A1BDC43381 for ; Tue, 12 Mar 2019 16:30:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0FCB3214AE for ; Tue, 12 Mar 2019 16:30:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="V7CLrU1w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726761AbfCLQaH (ORCPT ); Tue, 12 Mar 2019 12:30:07 -0400 Received: from mail-wm1-f66.google.com ([209.85.128.66]:54044 "EHLO mail-wm1-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726255AbfCLQaH (ORCPT ); Tue, 12 Mar 2019 12:30:07 -0400 Received: by mail-wm1-f66.google.com with SMTP id e74so3356907wmg.3; Tue, 12 Mar 2019 09:30:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=bMiuwFBF8gnOyWmPs4CD+VDbj1+RuFlJFvCVSanpH0U=; b=V7CLrU1wItM59oXy88PHtuSxMkFkLSp+gO0TmdH3vRaJa/1qWEStQBWtFNfyvR7Od9 QvHRPch27/j38eCEDzWuCOUyZpSYlADE7QBhrrWigr3pDlisYQT+ReTMaKyeKDbxcZm1 8yZZUD4clGCx10Ay5GhL5e+4OmCX8fUaNDWdrldtjNe+WgJ9X6NUWUt20E7pNxidg/Xa Duw+APlhowOptU7kgUEgbCA6jHGIxLeh2R/GIARJEwMm6hvLaR1mA0IE9L94ykG91q98 NjkXgWa3QjRP+EaUr2BWi7rzKbpRjszOE3k/vd4sYzpH0B7KlZYh6bE11EbEmX0oZp3y 4qjA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=bMiuwFBF8gnOyWmPs4CD+VDbj1+RuFlJFvCVSanpH0U=; b=nLGBB9Ya264LNcXWow3tQVEllLnMrKCjK003OSGzvSmGZXtYQqZPeKpVWUMlHSCuyH P4f68Bem0mMFMk8qp0f5PVsCFdMcyIaTQZyNozrHcsyLcsyvXuMx7s7CXAZwCTgF1nLT eMt9HmdezJqHicWnBVpbVJtU68TVKdclbuf6KIq1/rkKAf6fEw29SNqffp/Tb76y6SAM o6La5QRbTyAm+5e3a1BTahhoJ7U3hnk7IacLGkXY9T+Cysb17Hdf2idEAYUlFOdOzNQw ubf4ai7bXy0WOey0iYkMBOiYNi1TwZ/btYOdRIs1Yg6CQrbSB8V8zkno70lysTWX4fpG poYA== X-Gm-Message-State: APjAAAUBiSC+epq79x/UFFXN97pQI/KQXxiiZK/TXjP8KIX6yTYSb+Ey VNAPriZT949Y/LUZErDLBtltIRaObqwukOu2DcnUDyMK X-Google-Smtp-Source: APXvYqz7FoUNvPAk8FGkU3TAe9RNnl4aOGFT85DCnJcgpizFIvXoxsQfKed/o2Hx7aJqMv7Ykeb9Kl5+0+++TIIk7uQ= X-Received: by 2002:a1c:7a03:: with SMTP id v3mr3007691wmc.59.1552408204112; Tue, 12 Mar 2019 09:30:04 -0700 (PDT) MIME-Version: 1.0 References: <00000000000089bb100583e5fe7a@google.com> In-Reply-To: <00000000000089bb100583e5fe7a@google.com> From: Xin Long Date: Wed, 13 Mar 2019 00:29:52 +0800 Message-ID: Subject: Re: general protection fault in sctp_assoc_rwnd_increase To: syzbot Cc: davem , LKML , linux-sctp@vger.kernel.org, Marcelo Ricardo Leitner , network dev , Neil Horman , syzkaller-bugs , Vlad Yasevich Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Mar 12, 2019 at 9:52 PM syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: a089e4fe Merge tag 'linux-watchdog-5.1-rc1' of git://www.l.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=144e9ee7200000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b613f0327d980b6b > dashboard link: https://syzkaller.appspot.com/bug?extid=85e0b422ff140b03672a > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > userspace arch: amd64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12613b13200000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10f1884d200000 Not sure why I got this Call Trace with the reproducer, and it's different, is that expected? [256577.101170] FAULT_INJECTION: forcing a failure. [256577.101170] name failslab, interval 1, probability 0, space 0, times 0 [256577.103628] CPU: 0 PID: 2453 Comm: syz-executor Not tainted 5.0.0.test.syz #235 [256577.105201] Hardware name: Red Hat KVM, BIOS seabios-1.7.5-8.el7 04/01/2014 [256577.106680] Call Trace: [256577.107248] dump_stack+0x7c/0xc0 [256577.107981] should_fail.cold.4+0x5/0x13 [256577.108853] ? fault_create_debugfs_attr+0x190/0x190 [256577.109926] ? lock_downgrade+0x5d0/0x5d0 [256577.110816] ? selinux_sk_alloc_security+0x72/0x190 [256577.111878] ? selinux_sk_alloc_security+0x72/0x190 [256577.112931] should_failslab+0xa/0x20 [256577.113738] kmem_cache_alloc_trace+0x27a/0x350 [256577.114733] selinux_sk_alloc_security+0x72/0x190 [256577.115757] ? kmem_cache_alloc+0x2dc/0x310 [256577.116674] security_sk_alloc+0x4f/0x90 [256577.117543] sk_prot_alloc+0x82/0x250 [256577.118362] sk_alloc+0x35/0xc80 [256577.119100] inet6_create+0x26e/0xec0 [256577.119924] __sock_create+0x277/0x550 [256577.120804] sctp_do_peeloff+0x162/0x3b0 [sctp] [256577.121795] ? sched_clock+0x5/0x10 [256577.122596] ? sctp_copy_sock+0xfa0/0xfa0 [sctp] [256577.123646] sctp_getsockopt_peeloff_common.isra.31+0x78/0x2c0 [sctp] [256577.125064] ? sctp_do_peeloff+0x3b0/0x3b0 [sctp] [256577.126129] sctp_getsockopt.part.32+0x2d76/0x4a90 [sctp] > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+85e0b422ff140b03672a@syzkaller.appspotmail.com > > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446679 > RDX: 0000000000000066 RSI: 0000000000000084 RDI: 0000000000000003 > RBP: 00000000006dbc30 R08: 0000000020000140 R09: 0000000000000038 > R10: 0000000020000040 R11: 0000000000000246 R12: 00000000006dbc3c > R13: 00007f47f49ded90 R14: 0000000000000004 R15: 20c49ba5e353f7cf > 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: 7680 Comm: syz-executor161 Not tainted 5.0.0+ #18 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > RIP: 0010:sctp_assoc_rwnd_increase+0x34/0x520 net/sctp/associola.c:1498 > Code: 41 54 49 89 fc 53 89 f3 48 83 ec 10 e8 95 90 f1 fa 49 8d bc 24 60 06 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 > c0 74 08 3c 03 0f 8e 2f 04 00 00 45 8b ac 24 60 06 > RSP: 0018:ffff88808da476f8 EFLAGS: 00010203 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 > RDX: 00000000000000cb RSI: ffffffff867ecd5b RDI: 000000000000065f > RBP: ffff88808da47730 R08: ffff88808c5d64c0 R09: ffff88808c5d6d88 > R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffff > R13: 0000000000000000 R14: ffff88808c4d6f00 R15: 0000000000000000 > FS: 00007f47f49df700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000020000044 CR3: 0000000097508000 CR4: 00000000001406f0 > Call Trace: > sctp_ulpevent_release_data net/sctp/ulpevent.c:1092 [inline] > sctp_ulpevent_free+0x21f/0x4e0 net/sctp/ulpevent.c:1129 > sctp_queue_purge_ulpevents+0xc4/0x110 net/sctp/ulpevent.c:1146 > sctp_close+0x148/0x860 net/sctp/socket.c:1515 > inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 > inet6_release+0x53/0x80 net/ipv6/af_inet6.c:473 > __sock_release+0x1fe/0x2b0 net/socket.c:579 > sock_release+0x18/0x20 net/socket.c:599 > sctp_do_peeloff+0x38a/0x470 net/sctp/socket.c:5649 > sctp_getsockopt_peeloff_common.isra.0+0x8e/0x270 net/sctp/socket.c:5665 > sctp_getsockopt_peeloff net/sctp/socket.c:5707 [inline] > sctp_getsockopt net/sctp/socket.c:7802 [inline] > sctp_getsockopt+0x1ec1/0x6741 net/sctp/socket.c:7758 > sock_common_getsockopt+0x9a/0xe0 net/core/sock.c:3079 > __sys_getsockopt+0x168/0x250 net/socket.c:1960 > __do_sys_getsockopt net/socket.c:1971 [inline] > __se_sys_getsockopt net/socket.c:1968 [inline] > __x64_sys_getsockopt+0xbe/0x150 net/socket.c:1968 > do_syscall_64+0x103/0x610 arch/x86/entry/common.c:290 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x446679 > Code: e8 6c b4 02 00 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 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f47f49ded88 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 0000000000446679 > RDX: 0000000000000066 RSI: 0000000000000084 RDI: 0000000000000003 > RBP: 00000000006dbc30 R08: 0000000020000140 R09: 0000000000000038 > R10: 0000000020000040 R11: 0000000000000246 R12: 00000000006dbc3c > R13: 00007f47f49ded90 R14: 0000000000000004 R15: 20c49ba5e353f7cf > Modules linked in: > ---[ end trace dfa9a15945f164b7 ]--- > RIP: 0010:sctp_assoc_rwnd_increase+0x34/0x520 net/sctp/associola.c:1498 > Code: 41 54 49 89 fc 53 89 f3 48 83 ec 10 e8 95 90 f1 fa 49 8d bc 24 60 06 > 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 > c0 74 08 3c 03 0f 8e 2f 04 00 00 45 8b ac 24 60 06 > RSP: 0018:ffff88808da476f8 EFLAGS: 00010203 > RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000001 > RDX: 00000000000000cb RSI: ffffffff867ecd5b RDI: 000000000000065f > RBP: ffff88808da47730 R08: ffff88808c5d64c0 R09: ffff88808c5d6d88 > R10: 0000000000000000 R11: 0000000000000000 R12: ffffffffffffffff > R13: 0000000000000000 R14: ffff88808c4d6f00 R15: 0000000000000000 > FS: 00007f47f49df700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000000020000044 CR3: 0000000097508000 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