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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 5BEC1C3B18C for ; Thu, 13 Feb 2020 18:37:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 42935222C2 for ; Thu, 13 Feb 2020 18:37:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728331AbgBMShP (ORCPT ); Thu, 13 Feb 2020 13:37:15 -0500 Received: from mail-il1-f200.google.com ([209.85.166.200]:46557 "EHLO mail-il1-f200.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727779AbgBMShP (ORCPT ); Thu, 13 Feb 2020 13:37:15 -0500 Received: by mail-il1-f200.google.com with SMTP id a2so5428427ill.13 for ; Thu, 13 Feb 2020 10:37:14 -0800 (PST) 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=+zEG83XJ2KD3tG6iswUl3A3tfv53W4BSz1ckWVsUsPQ=; b=aC9FjPqQ0eLeYXe+xqsP87KeKJpupQ5kVMfBaZtj/bXBBi2zw5dBxWPO4uHIul49TN stnY9+G1nsWhHwVeu0vR49uVX06WMY0DmHDHhfOudA6+o925Nb1pWvhg4j5EE0hg0B6c PCNf/GPx6J64uGAdDZf7i46R3N9CGo68J8MfU9OVW/OJatQAzujLuyKL90t1ElxCxIpz +1ah3MfhxUKNgWJIAoKouWk1qRxP+tZI9lo+p0m64YFDzodUrcXmMe+/M4kaF1LhMTvN 38MLs6aEbpoZ0N7ZkU8E1cS8fY7u12QnCOgbLLQgpotGQ1sMvlcVzEcG2BJKtt5zJcZC YFGQ== X-Gm-Message-State: APjAAAWeSHgOnf5vhtT3VqGHltWjyReuAQ4A9mFd3nrB06jp+rt8/Dkn ylRf7Qi2X3mf6NNwKeNT53h8o9QTQ/l4gTWYMTrh6iyXeotR X-Google-Smtp-Source: APXvYqwpDr8WMrelfAhfG71WD/hHH/92X9e6sc5SsUElMtH1a9tCOfese5BRwU3d5gC8zWRS/1p1mb+RvBAuRPBPZ2UIUfOBbFXM MIME-Version: 1.0 X-Received: by 2002:a92:5d03:: with SMTP id r3mr16292873ilb.278.1581619034415; Thu, 13 Feb 2020 10:37:14 -0800 (PST) Date: Thu, 13 Feb 2020 10:37:14 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b76960059e7960fc@google.com> Subject: memory leak in kcm_sendmsg From: syzbot To: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com, jslaby@suse.cz, kafai@fb.com, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, willy@infradead.org, yhs@fb.com Content-Type: text/plain; charset="UTF-8" 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: f2850dd5 Merge tag 'kbuild-fixes-v5.6' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15b6e2a1e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=2802e33434f4f863 dashboard link: https://syzkaller.appspot.com/bug?extid=b039f5699bd82e1fb011 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1036aae6e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a48aa1e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+b039f5699bd82e1fb011@syzkaller.appspotmail.com executing program executing program BUG: memory leak unreferenced object 0xffff88812166aa00 (size 224): comm "syz-executor252", pid 7098, jiffies 4294946073 (age 7.970s) hex dump (first 32 bytes): 00 5f 7e 21 81 88 ff ff 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: [<00000000344c790c>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<00000000344c790c>] slab_post_alloc_hook mm/slab.h:586 [inline] [<00000000344c790c>] slab_alloc_node mm/slab.c:3263 [inline] [<00000000344c790c>] kmem_cache_alloc_node+0x163/0x2f0 mm/slab.c:3575 [<0000000055638a6a>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198 [<00000000e5df7d05>] alloc_skb include/linux/skbuff.h:1051 [inline] [<00000000e5df7d05>] kcm_sendmsg+0x63e/0xa6b net/kcm/kcmsock.c:969 [<000000001a13b16a>] sock_sendmsg_nosec net/socket.c:652 [inline] [<000000001a13b16a>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<0000000051101f49>] ____sys_sendmsg+0x123/0x300 net/socket.c:2343 [<000000002286b08d>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000027623508>] __sys_sendmmsg+0xf4/0x270 net/socket.c:2487 [<00000000a5d459c2>] __do_sys_sendmmsg net/socket.c:2516 [inline] [<00000000a5d459c2>] __se_sys_sendmmsg net/socket.c:2513 [inline] [<00000000a5d459c2>] __x64_sys_sendmmsg+0x28/0x30 net/socket.c:2513 [<00000000345a6e04>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<00000000e4a592cb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff888123b6fa00 (size 512): comm "syz-executor252", pid 7098, jiffies 4294946073 (age 7.970s) hex dump (first 32 bytes): 00 00 33 33 00 00 00 02 42 01 0a 80 00 42 86 dd ..33....B....B.. 60 00 00 00 00 10 3a ff fe 80 00 00 00 00 00 00 `.....:......... backtrace: [<000000003f7d57be>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000003f7d57be>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000003f7d57be>] slab_alloc_node mm/slab.c:3263 [inline] [<000000003f7d57be>] kmem_cache_alloc_node_trace+0x161/0x2f0 mm/slab.c:3593 [<000000007b27008a>] __do_kmalloc_node mm/slab.c:3615 [inline] [<000000007b27008a>] __kmalloc_node_track_caller+0x38/0x50 mm/slab.c:3630 [<00000000b67c7fa9>] __kmalloc_reserve.isra.0+0x40/0xb0 net/core/skbuff.c:142 [<0000000084d25a21>] __alloc_skb+0xa0/0x210 net/core/skbuff.c:210 [<00000000e5df7d05>] alloc_skb include/linux/skbuff.h:1051 [inline] [<00000000e5df7d05>] kcm_sendmsg+0x63e/0xa6b net/kcm/kcmsock.c:969 [<000000001a13b16a>] sock_sendmsg_nosec net/socket.c:652 [inline] [<000000001a13b16a>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<0000000051101f49>] ____sys_sendmsg+0x123/0x300 net/socket.c:2343 [<000000002286b08d>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000027623508>] __sys_sendmmsg+0xf4/0x270 net/socket.c:2487 [<00000000a5d459c2>] __do_sys_sendmmsg net/socket.c:2516 [inline] [<00000000a5d459c2>] __se_sys_sendmmsg net/socket.c:2513 [inline] [<00000000a5d459c2>] __x64_sys_sendmmsg+0x28/0x30 net/socket.c:2513 [<00000000345a6e04>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<00000000e4a592cb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff8881217e5f00 (size 224): comm "syz-executor252", pid 7098, jiffies 4294946073 (age 7.970s) hex dump (first 32 bytes): 00 5e 7e 21 81 88 ff ff 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: [<00000000344c790c>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<00000000344c790c>] slab_post_alloc_hook mm/slab.h:586 [inline] [<00000000344c790c>] slab_alloc_node mm/slab.c:3263 [inline] [<00000000344c790c>] kmem_cache_alloc_node+0x163/0x2f0 mm/slab.c:3575 [<0000000055638a6a>] __alloc_skb+0x6e/0x210 net/core/skbuff.c:198 [<00000000e5df7d05>] alloc_skb include/linux/skbuff.h:1051 [inline] [<00000000e5df7d05>] kcm_sendmsg+0x63e/0xa6b net/kcm/kcmsock.c:969 [<000000001a13b16a>] sock_sendmsg_nosec net/socket.c:652 [inline] [<000000001a13b16a>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<0000000051101f49>] ____sys_sendmsg+0x123/0x300 net/socket.c:2343 [<000000002286b08d>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000027623508>] __sys_sendmmsg+0xf4/0x270 net/socket.c:2487 [<00000000a5d459c2>] __do_sys_sendmmsg net/socket.c:2516 [inline] [<00000000a5d459c2>] __se_sys_sendmmsg net/socket.c:2513 [inline] [<00000000a5d459c2>] __x64_sys_sendmmsg+0x28/0x30 net/socket.c:2513 [<00000000345a6e04>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<00000000e4a592cb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 BUG: memory leak unreferenced object 0xffff88812084ae00 (size 512): comm "syz-executor252", pid 7098, jiffies 4294946073 (age 7.970s) hex dump (first 32 bytes): a3 0f 00 00 00 00 00 00 40 00 00 00 00 00 00 00 ........@....... 40 00 40 00 00 00 00 00 40 00 40 00 00 00 00 00 @.@.....@.@..... backtrace: [<000000003f7d57be>] kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] [<000000003f7d57be>] slab_post_alloc_hook mm/slab.h:586 [inline] [<000000003f7d57be>] slab_alloc_node mm/slab.c:3263 [inline] [<000000003f7d57be>] kmem_cache_alloc_node_trace+0x161/0x2f0 mm/slab.c:3593 [<000000007b27008a>] __do_kmalloc_node mm/slab.c:3615 [inline] [<000000007b27008a>] __kmalloc_node_track_caller+0x38/0x50 mm/slab.c:3630 [<00000000b67c7fa9>] __kmalloc_reserve.isra.0+0x40/0xb0 net/core/skbuff.c:142 [<0000000084d25a21>] __alloc_skb+0xa0/0x210 net/core/skbuff.c:210 [<00000000e5df7d05>] alloc_skb include/linux/skbuff.h:1051 [inline] [<00000000e5df7d05>] kcm_sendmsg+0x63e/0xa6b net/kcm/kcmsock.c:969 [<000000001a13b16a>] sock_sendmsg_nosec net/socket.c:652 [inline] [<000000001a13b16a>] sock_sendmsg+0x54/0x70 net/socket.c:672 [<0000000051101f49>] ____sys_sendmsg+0x123/0x300 net/socket.c:2343 [<000000002286b08d>] ___sys_sendmsg+0x8a/0xd0 net/socket.c:2397 [<0000000027623508>] __sys_sendmmsg+0xf4/0x270 net/socket.c:2487 [<00000000a5d459c2>] __do_sys_sendmmsg net/socket.c:2516 [inline] [<00000000a5d459c2>] __se_sys_sendmmsg net/socket.c:2513 [inline] [<00000000a5d459c2>] __x64_sys_sendmmsg+0x28/0x30 net/socket.c:2513 [<00000000345a6e04>] do_syscall_64+0x73/0x220 arch/x86/entry/common.c:294 [<00000000e4a592cb>] entry_SYSCALL_64_after_hwframe+0x44/0xa9 --- 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