Received: by 2002:a05:6358:3188:b0:123:57c1:9b43 with SMTP id q8csp4195265rwd; Tue, 23 May 2023 04:45:20 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ5MtIg0XH9uWT4WThYrKDmf9Wrrn1Kgbm241OAmRe3xpBBbekdom8eHQ1IYH9tSSv57jKTJ X-Received: by 2002:a05:6a20:3c87:b0:10c:7c72:bdf9 with SMTP id b7-20020a056a203c8700b0010c7c72bdf9mr2257413pzj.29.1684842320172; Tue, 23 May 2023 04:45:20 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1684842320; cv=none; d=google.com; s=arc-20160816; b=rllUGEAxylXg925f1CnY4zTmfKgts14mYiSkIJ/gRVRHj8uVn0cOMY5sMExh13zy0m t8k+hu17MrDUPFO8dk7ITcfFMK/s+rYUaPrjghKohLFynWIr0nOyPpq8azXFytI/Mr+E knLAV1dOGbf6jDHYyO3Ylr+JPxK9Gg/HYFy3Pah9HpZXtLSbv6D/apL12N8o08viCxte O1KTlPKauB86foc3n8pzyGGgINx2h+cWPBER6s8OQostE+DJS3IgWBp/J3lDD9KgPnAX z9IEEeZFtdDInIqnfHmfttFOUZ5HAvwJ2ETenw4lJz2vXiTNR4Lbj6t3/5VHqBS6Bf6O aZaA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:in-reply-to:from :references:cc:to:content-language:subject:user-agent:mime-version :date:message-id:dkim-signature; bh=O5Tj7I7f1brNL3JpWUYPXV5aI/v2uveyJXXIDFWofgk=; b=dKK03qfsG5fjan0pwu4gN6nj1Ey+mjA2TSXQx+EKR4vFDK1JLdBDL04SEGyzJAEUx3 mnNJvjz259HEKfXUl78TqzaEaJ4BSALTEm0WAB8+zh2ubeiNxhOxUkP/JCWhTRqmuLFb Ykk3fJJTL+cCtu8whOlgExz5BK8QGDZ+KDugZdhATD8wD1XIJgC3qC7GWp9TaOHjtqP+ F19o1tiG+r7dFF4JCStEs9rfxawrxgtoa6Hy4UFvqSSmjOr7E/FlvDP5fvqmWYpymEIs d2ThkoegG18T0udzCV48KftZEtHGS3EJ2cFopRo1EIXj7yb3T/lR5yylm2CyvRyHS+kO 8ufw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@mojatatu-com.20221208.gappssmtp.com header.s=20221208 header.b=qJBtDQ96; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 76-20020a62194f000000b006462cc07d9esi1372380pfz.300.2023.05.23.04.45.07; Tue, 23 May 2023 04:45:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@mojatatu-com.20221208.gappssmtp.com header.s=20221208 header.b=qJBtDQ96; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236147AbjEWLgp (ORCPT + 99 others); Tue, 23 May 2023 07:36:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232785AbjEWLgo (ORCPT ); Tue, 23 May 2023 07:36:44 -0400 Received: from mail-ot1-x334.google.com (mail-ot1-x334.google.com [IPv6:2607:f8b0:4864:20::334]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D156118 for ; Tue, 23 May 2023 04:36:42 -0700 (PDT) Received: by mail-ot1-x334.google.com with SMTP id 46e09a7af769-6af873d1d8bso570716a34.3 for ; Tue, 23 May 2023 04:36:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mojatatu-com.20221208.gappssmtp.com; s=20221208; t=1684841801; x=1687433801; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=O5Tj7I7f1brNL3JpWUYPXV5aI/v2uveyJXXIDFWofgk=; b=qJBtDQ96+pVB173iM3aexPgkXCe0+8SZp/gAgErOY+c0r2/IIiWIrBfDzNBZ0yJ5lM XjzwU5ovC/tqrnrTwbbUtuQtaWbYWENl3ogbkNGFVq2mvj+XsLW0cOMjxRjSK17OV9Az ulxBsWDpvMrHeYUKOyxqlEMAr590bp0cWySkbkyDYwEA5JtyC5BhgjqXwjx8NNoynrdH v/hzBE1Rpe6TsIK02ICjWPbRrPQZ1FhODnwE7otx+dYHQT+zL/rLP1zKio69bJjxmb5B SHc/7XUqYre5yWi3nFy47NfUrw7FVMONYKYcDOycRBLkFph1pKjGlPnfNelPJarw2Cvk PS4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684841801; x=1687433801; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=O5Tj7I7f1brNL3JpWUYPXV5aI/v2uveyJXXIDFWofgk=; b=Xf4T+14yEND/hBrIUmvyBOlAVdYcRN1ZIv9vqiy5eRW+c4gMvo8yQ7c7Snu+X56XAy PRCvuGQC4KHR9RyZzSwTFulDD/Y0hq96J7HuHdQY3G8EuiTGzgCuQ/ObRuD1eE2yLMwM Bq12dWVvgrtbJ9wR+sWS2DgB0Dt6tRMg2p1UG+WOp+vnqLiGoJZ92or32y94BveGfFpN njR/Y08fxpLRlC704xiE1b8yoKwtKC+50GgfTbPK4L7Bk2SHZsneUYGoEmgL5GprVE3K NSX6p8KWSGumVjOme7JFn0u8yoFvQPrfuQHIYo67HIP1mRiE8UZZ9xhp/SAKyQxEwaFa RT/w== X-Gm-Message-State: AC+VfDxNdBjcowl3rlAan6bEitAIHVYTbh9evi1XLMX83ZN+m24AoDHG ui3sWr3uk3l0EJv/GPMRL9QcRA== X-Received: by 2002:a9d:6ad9:0:b0:6aa:f539:5ad5 with SMTP id m25-20020a9d6ad9000000b006aaf5395ad5mr6143069otq.23.1684841801209; Tue, 23 May 2023 04:36:41 -0700 (PDT) Received: from ?IPV6:2804:14d:5c5e:44fb:6e3:2de7:7b12:484a? ([2804:14d:5c5e:44fb:6e3:2de7:7b12:484a]) by smtp.gmail.com with ESMTPSA id s9-20020a9d7589000000b006abb3b660a9sm3269996otk.54.2023.05.23.04.36.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 23 May 2023 04:36:40 -0700 (PDT) Message-ID: Date: Tue, 23 May 2023 08:36:35 -0300 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Subject: Re: [PATCH v2 net 6/6] net/sched: qdisc_destroy() old ingress and clsact Qdiscs before grafting Content-Language: en-US To: Peilin Ye Cc: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Jamal Hadi Salim , Cong Wang , Jiri Pirko , Peilin Ye , Daniel Borkmann , John Fastabend , Hillf Danton , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Cong Wang , Vlad Buslov References: <8e3383d0bacd084f0e33d9158d24bd411f1bf6ba.1684796705.git.peilin.ye@bytedance.com> <5b28cd6f-d921-b095-1190-474bcce89e53@mojatatu.com> From: Pedro Tammela In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,NICE_REPLY_A,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 23/05/2023 01:40, Peilin Ye wrote: > Hi Pedro, > > On Tue, May 23, 2023 at 12:51:44AM -0300, Pedro Tammela wrote: >> With V2 patches 5 and 6 applied I was still able to trigger an oops. >> >> Branch is 'net' + patches 5 & 6: >> 145f639b9403 (HEAD -> main) net/sched: qdisc_destroy() old ingress and >> clsact Qdiscs before grafting >> 1aac74ef9673 net/sched: Refactor qdisc_graft() for ingress and clsact Qdiscs >> 18c40a1cc1d9 (origin/main, origin/HEAD) net/handshake: Fix sock->file >> allocation >> >> Kernel config is the same as in the syzbot report. >> Note that this was on a _single core_ VM. >> I will double check if v1 is triggering this issue (basically run the repro >> for a long time). For multi-core my VM is running OOM even on a 32Gb system. >> I will check if we have a spare server to run the repro. > > Thanks for testing this, but the syzbot reproducer creates ingress Qdiscs > under TC_H_ROOT, which isn't covered by [6/6] i.e. it exercises the > "!ingress" path in qdisc_graft(). I think that's why you are still seeing > the oops. Adding sch_{ingress,clsact} to TC_H_ROOT is no longer possible > after [1,2/6], and I think we'll need a different reproducer for [5,6/6]. > > However I just noticed that for some reason my git-send-email in my new > setup didn't auto-generate From: tags with my work email, so Author: will > be my personal email (I have to send patches from personal email to avoid > "[External] " subject prefixes) ... I will fix it in v3 soon. Sorry in > advance for spamming. > > Thanks, > Peilin Ye > I see, We need to make sure then, when the time comes, that all the required patches are back ported in the same bundle so we don't have a partial fix; given that they target different commit tags. I was still able to trigger an oops with the full patchset: [ 104.944353][ T6588] ------------[ cut here ]------------ [ 104.944896][ T6588] jump label: negative count! [ 104.945780][ T6588] WARNING: CPU: 0 PID: 6588 at kernel/jump_label.c:263 static_key_slow_try_dec+0xf2/0x110 [ 104.946795][ T6588] Modules linked in: [ 104.947111][ T6588] CPU: 0 PID: 6588 Comm: repro Not tainted 6.4.0-rc2-00191-g4a3f9100193d #3 [ 104.947765][ T6588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014 [ 104.948557][ T6588] RIP: 0010:static_key_slow_try_dec+0xf2/0x110 [ 104.949064][ T6588] Code: d5 ff e8 c1 33 d5 ff 44 89 e8 5b 5d 41 5c 41 5d c3 44 89 e5 e9 66 ff ff ff e8 aa 33 d5 ff 48 c7 c7 00 9c 56 8a e8 4e ce 9c ff <0f> 0b eb ae 48 89 df e8 02 4b 28 00 e9 42 ff ff ff 66 66 2e 0f 1f [ 104.951134][ T6588] RSP: 0018:ffffc900079cf2c0 EFLAGS: 00010286 [ 104.951646][ T6588] RAX: 0000000000000000 RBX: ffffffff9213a160 RCX: 0000000000000000 [ 104.952269][ T6588] RDX: ffff888112f83b80 RSI: ffffffff814c7747 RDI: 0000000000000001 [ 104.952901][ T6588] RBP: 00000000ffffffff R08: 0000000000000001 R09: 0000000000000000 [ 104.953523][ T6588] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff [ 104.954133][ T6588] R13: ffff88816a514001 R14: 0000000000000001 R15: ffffffff8e7b0680 [ 104.954746][ T6588] FS: 00007f76c65d56c0(0000) GS:ffff8881f5a00000(0000) knlGS:0000000000000000 [ 104.955430][ T6588] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.955941][ T6588] CR2: 00007f9a40357a50 CR3: 000000011461e000 CR4: 0000000000350ef0 [ 104.956559][ T6588] Call Trace: [ 104.956829][ T6588] [ 104.957062][ T6588] ? clsact_egress_block_get+0x40/0x40 [ 104.957507][ T6588] static_key_slow_dec+0x60/0xc0 [ 104.957906][ T6588] qdisc_create+0xa45/0x1090 [ 104.958274][ T6588] ? tc_get_qdisc+0xb70/0xb70 [ 104.958646][ T6588] tc_modify_qdisc+0x491/0x1b70 [ 104.959031][ T6588] ? qdisc_create+0x1090/0x1090 [ 104.959420][ T6588] ? bpf_lsm_capable+0x9/0x10 [ 104.959797][ T6588] ? qdisc_create+0x1090/0x1090 [ 104.960175][ T6588] rtnetlink_rcv_msg+0x439/0xd30 [ 104.960625][ T6588] ? rtnl_getlink+0xb10/0xb10 [ 104.960995][ T6588] ? __x64_sys_sendmmsg+0x9c/0x100 [ 104.961397][ T6588] ? do_syscall_64+0x38/0xb0 [ 104.961767][ T6588] ? netdev_core_pick_tx+0x390/0x390 [ 104.962195][ T6588] netlink_rcv_skb+0x166/0x440 [ 104.962584][ T6588] ? rtnl_getlink+0xb10/0xb10 [ 104.962954][ T6588] ? netlink_ack+0x1370/0x1370 [ 104.963336][ T6588] ? kasan_set_track+0x25/0x30 [ 104.963731][ T6588] ? netlink_deliver_tap+0x1b1/0xd00 [ 104.964156][ T6588] netlink_unicast+0x530/0x800 [ 104.964537][ T6588] ? netlink_attachskb+0x880/0x880 [ 104.964951][ T6588] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 104.965405][ T6588] ? __phys_addr_symbol+0x30/0x70 [ 104.965793][ T6588] ? __check_object_size+0x323/0x740 [ 104.966205][ T6588] netlink_sendmsg+0x90b/0xe10 [ 104.966577][ T6588] ? netlink_unicast+0x800/0x800 [ 104.966965][ T6588] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 104.967374][ T6588] ? netlink_unicast+0x800/0x800 [ 104.967761][ T6588] sock_sendmsg+0xd9/0x180 [ 104.968109][ T6588] ____sys_sendmsg+0x264/0x910 [ 104.968490][ T6588] ? kernel_sendmsg+0x50/0x50 [ 104.968871][ T6588] ? __copy_msghdr+0x460/0x460 [ 104.969244][ T6588] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 104.969716][ T6588] ? find_held_lock+0x2d/0x110 [ 104.970088][ T6588] ___sys_sendmsg+0x11d/0x1b0 [ 104.970491][ T6588] ? do_recvmmsg+0x700/0x700 [ 104.970853][ T6588] ? __fget_files+0x260/0x420 [ 104.971221][ T6588] ? reacquire_held_locks+0x4b0/0x4b0 [ 104.971649][ T6588] ? __fget_files+0x282/0x420 [ 104.972018][ T6588] ? __fget_light+0xe6/0x270 [ 104.972384][ T6588] __sys_sendmmsg+0x18e/0x430 [ 104.972766][ T6588] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 104.973167][ T6588] ? reacquire_held_locks+0x4b0/0x4b0 [ 104.973588][ T6588] ? rcu_is_watching+0x12/0xb0 [ 104.973958][ T6588] ? xfd_validate_state+0x5d/0x180 [ 104.974355][ T6588] ? restore_fpregs_from_fpstate+0xc1/0x1d0 [ 104.974796][ T6588] ? unlock_page_memcg+0x2d0/0x2d0 [ 104.975178][ T6588] ? do_futex+0x350/0x350 [ 104.975501][ T6588] __x64_sys_sendmmsg+0x9c/0x100 [ 104.975867][ T6588] ? syscall_enter_from_user_mode+0x26/0x80 [ 104.976307][ T6588] do_syscall_64+0x38/0xb0 [ 104.976649][ T6588] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 104.977088][ T6588] RIP: 0033:0x7f76c66ee89d [ 104.977417][ T6588] Code: 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 73 01 c3 48 8b 0d 4b 05 0e 00 f7 d8 64 89 01 48 [ 104.978835][ T6588] RSP: 002b:00007f76c65d4c68 EFLAGS: 00000203 ORIG_RAX: 0000000000000133 [ 104.979468][ T6588] RAX: ffffffffffffffda RBX: 00007f76c65d5cdc RCX: 00007f76c66ee89d [ 104.980073][ T6588] RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000007 [ 104.980739][ T6588] RBP: 00007f76c65d4de0 R08: 0000000100000001 R09: 0000000000000000 [ 104.981352][ T6588] R10: 0000000000000000 R11: 0000000000000203 R12: fffffffffffffeb8 [ 104.981968][ T6588] R13: 0000000000000002 R14: 00007ffce5a5fd90 R15: 00007f76c65b5000 [ 104.982587][ T6588] [ 104.982833][ T6588] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 104.983391][ T6588] CPU: 0 PID: 6588 Comm: repro Not tainted 6.4.0-rc2-00191-g4a3f9100193d #3 [ 104.984054][ T6588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-debian-1.16.0-5 04/01/2014 [ 104.984854][ T6588] Call Trace: [ 104.985121][ T6588] [ 104.985359][ T6588] dump_stack_lvl+0xd9/0x1b0 [ 104.985733][ T6588] panic+0x689/0x730 [ 104.986053][ T6588] ? panic_smp_self_stop+0xa0/0xa0 [ 104.986467][ T6588] ? show_trace_log_lvl+0x28e/0x400 [ 104.986888][ T6588] ? static_key_slow_try_dec+0xf2/0x110 [ 104.987329][ T6588] check_panic_on_warn+0xab/0xb0 [ 104.987729][ T6588] __warn+0xf2/0x380 [ 104.988046][ T6588] ? static_key_slow_try_dec+0xf2/0x110 [ 104.988476][ T6588] report_bug+0x3bc/0x580 [ 104.988838][ T6588] handle_bug+0x3c/0x70 [ 104.989169][ T6588] exc_invalid_op+0x17/0x40 [ 104.989529][ T6588] asm_exc_invalid_op+0x1a/0x20 [ 104.989914][ T6588] RIP: 0010:static_key_slow_try_dec+0xf2/0x110 [ 104.990402][ T6588] Code: d5 ff e8 c1 33 d5 ff 44 89 e8 5b 5d 41 5c 41 5d c3 44 89 e5 e9 66 ff ff ff e8 aa 33 d5 ff 48 c7 c7 00 9c 56 8a e8 4e ce 9c ff <0f> 0b eb ae 48 89 df e8 02 4b 28 00 e9 42 ff ff ff 66 66 2e 0f 1f [ 104.990702][ T6588] RSP: 0018:ffffc900079cf2c0 EFLAGS: 00010286 [ 104.990702][ T6588] RAX: 0000000000000000 RBX: ffffffff9213a160 RCX: 0000000000000000 [ 104.990702][ T6588] RDX: ffff888112f83b80 RSI: ffffffff814c7747 RDI: 0000000000000001 [ 104.990702][ T6588] RBP: 00000000ffffffff R08: 0000000000000001 R09: 0000000000000000 [ 104.990702][ T6588] R10: 0000000000000001 R11: 0000000000000001 R12: 00000000ffffffff [ 104.990702][ T6588] R13: ffff88816a514001 R14: 0000000000000001 R15: ffffffff8e7b0680 [ 104.990702][ T6588] ? __warn_printk+0x187/0x310 [ 104.990702][ T6588] ? clsact_egress_block_get+0x40/0x40 [ 104.990702][ T6588] static_key_slow_dec+0x60/0xc0 [ 104.990702][ T6588] qdisc_create+0xa45/0x1090 [ 104.990702][ T6588] ? tc_get_qdisc+0xb70/0xb70 [ 104.990702][ T6588] tc_modify_qdisc+0x491/0x1b70 [ 104.990702][ T6588] ? qdisc_create+0x1090/0x1090 [ 104.990702][ T6588] ? bpf_lsm_capable+0x9/0x10 [ 104.990702][ T6588] ? qdisc_create+0x1090/0x1090 [ 104.990702][ T6588] rtnetlink_rcv_msg+0x439/0xd30 [ 104.990702][ T6588] ? rtnl_getlink+0xb10/0xb10 [ 104.990702][ T6588] ? __x64_sys_sendmmsg+0x9c/0x100 [ 104.990702][ T6588] ? do_syscall_64+0x38/0xb0 [ 104.990702][ T6588] ? netdev_core_pick_tx+0x390/0x390 [ 104.990702][ T6588] netlink_rcv_skb+0x166/0x440 [ 104.990702][ T6588] ? rtnl_getlink+0xb10/0xb10 [ 104.990702][ T6588] ? netlink_ack+0x1370/0x1370 [ 104.990702][ T6588] ? kasan_set_track+0x25/0x30 [ 104.990702][ T6588] ? netlink_deliver_tap+0x1b1/0xd00 [ 104.990702][ T6588] netlink_unicast+0x530/0x800 [ 104.990702][ T6588] ? netlink_attachskb+0x880/0x880 [ 104.990702][ T6588] ? __sanitizer_cov_trace_switch+0x54/0x90 [ 104.990702][ T6588] ? __phys_addr_symbol+0x30/0x70 [ 104.990702][ T6588] ? __check_object_size+0x323/0x740 [ 104.990702][ T6588] netlink_sendmsg+0x90b/0xe10 [ 104.990702][ T6588] ? netlink_unicast+0x800/0x800 [ 104.990702][ T6588] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 104.990702][ T6588] ? netlink_unicast+0x800/0x800 [ 104.990702][ T6588] sock_sendmsg+0xd9/0x180 [ 104.990702][ T6588] ____sys_sendmsg+0x264/0x910 [ 104.990702][ T6588] ? kernel_sendmsg+0x50/0x50 [ 104.990702][ T6588] ? __copy_msghdr+0x460/0x460 [ 104.990702][ T6588] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 104.990702][ T6588] ? find_held_lock+0x2d/0x110 [ 104.990702][ T6588] ___sys_sendmsg+0x11d/0x1b0 [ 104.990702][ T6588] ? do_recvmmsg+0x700/0x700 [ 104.990702][ T6588] ? __fget_files+0x260/0x420 [ 104.990702][ T6588] ? reacquire_held_locks+0x4b0/0x4b0 [ 104.990702][ T6588] ? __fget_files+0x282/0x420 [ 104.990702][ T6588] ? __fget_light+0xe6/0x270 [ 104.990702][ T6588] __sys_sendmmsg+0x18e/0x430 [ 104.990702][ T6588] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 104.990702][ T6588] ? reacquire_held_locks+0x4b0/0x4b0 [ 104.990702][ T6588] ? rcu_is_watching+0x12/0xb0 [ 104.990702][ T6588] ? xfd_validate_state+0x5d/0x180 [ 104.990702][ T6588] ? restore_fpregs_from_fpstate+0xc1/0x1d0 [ 104.990702][ T6588] ? unlock_page_memcg+0x2d0/0x2d0 [ 104.990702][ T6588] ? do_futex+0x350/0x350 [ 104.990702][ T6588] __x64_sys_sendmmsg+0x9c/0x100 [ 104.990702][ T6588] ? syscall_enter_from_user_mode+0x26/0x80 [ 104.990702][ T6588] do_syscall_64+0x38/0xb0 [ 104.990702][ T6588] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 104.990702][ T6588] RIP: 0033:0x7f76c66ee89d [ 104.990702][ T6588] Code: 5d c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 73 01 c3 48 8b 0d 4b 05 0e 00 f7 d8 64 89 01 48 [ 104.990702][ T6588] RSP: 002b:00007f76c65d4c68 EFLAGS: 00000203 ORIG_RAX: 0000000000000133 [ 104.990702][ T6588] RAX: ffffffffffffffda RBX: 00007f76c65d5cdc RCX: 00007f76c66ee89d [ 104.990702][ T6588] RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000007 [ 104.990702][ T6588] RBP: 00007f76c65d4de0 R08: 0000000100000001 R09: 0000000000000000 [ 104.990702][ T6588] R10: 0000000000000000 R11: 0000000000000203 R12: fffffffffffffeb8 [ 104.990702][ T6588] R13: 0000000000000002 R14: 00007ffce5a5fd90 R15: 00007f76c65b5000 [ 104.990702][ T6588] [ 104.990702][ T6588] Kernel Offset: disabled [ 104.990702][ T6588] Rebooting in 86400 seconds..