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=-3.8 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,LONGWORDS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,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 20BDAC28CC2 for ; Fri, 31 May 2019 14:58:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03A6825173 for ; Fri, 31 May 2019 14:58:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726773AbfEaO6H (ORCPT ); Fri, 31 May 2019 10:58:07 -0400 Received: from mail-it1-f197.google.com ([209.85.166.197]:54016 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726501AbfEaO6H (ORCPT ); Fri, 31 May 2019 10:58:07 -0400 Received: by mail-it1-f197.google.com with SMTP id p19so3886881itm.3 for ; Fri, 31 May 2019 07:58:06 -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=VAWNQSWXRFPjqWqvcnCxEWc2vR3xbR4pd4DDjFUHobY=; b=RosZ+pQwbgaGeqobNR5Z7F3XBwMDT7t4TJb57tCfDfdm6sSooYOKSQHcVAdHw03d/6 n7m559XeO44cgB3X+rP+/mnWSeAKfbNdg0LwXGmAsTKwZ1L1mqsM3+KAT60vOSaBtlcj s47JDAW77+FOXncTlCBXKupeFODKNZzA6Tjrv0W2tQD9J1vuRGlkbKvgXHatmEQUc3+n LU5qiLRwTMd7LxfdN/skXN7oH7MJE6TSV4k1zoMl+mmG3VUa+wBYoJUEbnKUNCNKSd8Y B26LGy+p1rB09x9nIAQbasO+2373z1jMDXGzo3ojAFf2wBhc0ctMMFbv1vQW9p+e1jhg qEUQ== X-Gm-Message-State: APjAAAXLJ8tg0yLqAhdG9sLXP1uHHZoXM6Nb/FgAdsOa4oD7WOpA7d50 4p46TUOVFGce8CNi+2LhEyQf8i+dKF8osr1Ii8coU06fwClK X-Google-Smtp-Source: APXvYqy2LGeUvc5Dv4FGMjjqAoqP0NyUOjJt4CyFzayeTo7kbBilfa4tIw/mJKkyGhkh2Se+kWhGagFiaeOjWEqSVURBSe8Ui2Fy MIME-Version: 1.0 X-Received: by 2002:a05:660c:444:: with SMTP id d4mr7089633itl.158.1559314685827; Fri, 31 May 2019 07:58:05 -0700 (PDT) Date: Fri, 31 May 2019 07:58:05 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f122ab058a303d94@google.com> Subject: memory leak in sctp_stream_init_ext From: syzbot To: davem@davemloft.net, linux-kernel@vger.kernel.org, linux-sctp@vger.kernel.org, marcelo.leitner@gmail.com, netdev@vger.kernel.org, nhorman@tuxdriver.com, syzkaller-bugs@googlegroups.com, vyasevich@gmail.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: bec7550c Merge tag 'docs-5.2-fixes2' of git://git.lwn.net/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=152a0916a00000 kernel config: https://syzkaller.appspot.com/x/.config?x=64479170dcaf0e11 dashboard link: https://syzkaller.appspot.com/bug?extid=7f3b6b106be8dcdcdeec compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1142cd4ca00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10f81d72a00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+7f3b6b106be8dcdcdeec@syzkaller.appspotmail.com executing program executing program executing program executing program executing program BUG: memory leak unreferenced object 0xffff8881114f5d80 (size 96): comm "syz-executor934", pid 7160, jiffies 4294993058 (age 31.950s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000ce7a1326>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline] [<00000000ce7a1326>] slab_post_alloc_hook mm/slab.h:439 [inline] [<00000000ce7a1326>] slab_alloc mm/slab.c:3326 [inline] [<00000000ce7a1326>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 [<000000007abb7ac9>] kmalloc include/linux/slab.h:547 [inline] [<000000007abb7ac9>] kzalloc include/linux/slab.h:742 [inline] [<000000007abb7ac9>] sctp_stream_init_ext+0x2b/0xa0 net/sctp/stream.c:157 [<0000000048ecb9c1>] sctp_sendmsg_to_asoc+0x946/0xa00 net/sctp/socket.c:1882 [<000000004483ca2b>] sctp_sendmsg+0x2a8/0x990 net/sctp/socket.c:2102 [<0000000094bdc32e>] inet_sendmsg+0x64/0x120 net/ipv4/af_inet.c:802 [<0000000022d1c2a5>] sock_sendmsg_nosec net/socket.c:652 [inline] [<0000000022d1c2a5>] sock_sendmsg+0x54/0x70 net/socket.c:671 [<000000006ab53119>] sock_write_iter+0xb6/0x130 net/socket.c:1000 [<00000000973772ef>] call_write_iter include/linux/fs.h:1872 [inline] [<00000000973772ef>] new_sync_write+0x1ad/0x260 fs/read_write.c:483 [<0000000033f2491b>] __vfs_write+0x87/0xa0 fs/read_write.c:496 [<00000000372fbd56>] vfs_write fs/read_write.c:558 [inline] [<00000000372fbd56>] vfs_write+0xee/0x210 fs/read_write.c:542 [<000000007ccb2ea5>] ksys_write+0x7c/0x130 fs/read_write.c:611 [<000000001c29b8c7>] __do_sys_write fs/read_write.c:623 [inline] [<000000001c29b8c7>] __se_sys_write fs/read_write.c:620 [inline] [<000000001c29b8c7>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620 [<0000000014d9243b>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 [<0000000059f6e9a8>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff8881114f5d80 (size 96): comm "syz-executor934", pid 7160, jiffies 4294993058 (age 33.160s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000ce7a1326>] kmemleak_alloc_recursive include/linux/kmemleak.h:55 [inline] [<00000000ce7a1326>] slab_post_alloc_hook mm/slab.h:439 [inline] [<00000000ce7a1326>] slab_alloc mm/slab.c:3326 [inline] [<00000000ce7a1326>] kmem_cache_alloc_trace+0x13d/0x280 mm/slab.c:3553 [<000000007abb7ac9>] kmalloc include/linux/slab.h:547 [inline] [<000000007abb7ac9>] kzalloc include/linux/slab.h:742 [inline] [<000000007abb7ac9>] sctp_stream_init_ext+0x2b/0xa0 net/sctp/stream.c:157 [<0000000048ecb9c1>] sctp_sendmsg_to_asoc+0x946/0xa00 net/sctp/socket.c:1882 [<000000004483ca2b>] sctp_sendmsg+0x2a8/0x990 net/sctp/socket.c:2102 [<0000000094bdc32e>] inet_sendmsg+0x64/0x120 net/ipv4/af_inet.c:802 [<0000000022d1c2a5>] sock_sendmsg_nosec net/socket.c:652 [inline] [<0000000022d1c2a5>] sock_sendmsg+0x54/0x70 net/socket.c:671 [<000000006ab53119>] sock_write_iter+0xb6/0x130 net/socket.c:1000 [<00000000973772ef>] call_write_iter include/linux/fs.h:1872 [inline] [<00000000973772ef>] new_sync_write+0x1ad/0x260 fs/read_write.c:483 [<0000000033f2491b>] __vfs_write+0x87/0xa0 fs/read_write.c:496 [<00000000372fbd56>] vfs_write fs/read_write.c:558 [inline] [<00000000372fbd56>] vfs_write+0xee/0x210 fs/read_write.c:542 [<000000007ccb2ea5>] ksys_write+0x7c/0x130 fs/read_write.c:611 [<000000001c29b8c7>] __do_sys_write fs/read_write.c:623 [inline] [<000000001c29b8c7>] __se_sys_write fs/read_write.c:620 [inline] [<000000001c29b8c7>] __x64_sys_write+0x1e/0x30 fs/read_write.c:620 [<0000000014d9243b>] do_syscall_64+0x76/0x1a0 arch/x86/entry/common.c:301 [<0000000059f6e9a8>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 executing program executing program executing program executing program executing program executing program --- 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#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches