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[67.180.167.114]) by smtp.gmail.com with ESMTPSA id r81-v6sm29155301pfa.18.2018.08.01.03.20.25 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 01 Aug 2018 03:20:25 -0700 (PDT) Subject: Re: AW: PROBLEM: Kernel Oops in UDP stack To: Marcel Hellwig , 'Eric Dumazet' , "'davem@davemloft.net'" , "'kuznet@ms2.inr.ac.ru'" , "'yoshfuji@linux-ipv6.org'" , "'andrew@lunn.ch'" Cc: "'netdev@vger.kernel.org'" , "'linux-kernel@vger.kernel.org'" , Matthias Wystrik References: <18092446dfa7435aaa8deaab65afbf23@ZCOM03.mut-group.com> From: Eric Dumazet Message-ID: <96753ca4-88fe-aa26-b439-6e22eaf8b524@gmail.com> Date: Wed, 1 Aug 2018 03:20:24 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/31/2018 10:55 PM, Marcel Hellwig wrote: > > [] (udp_recvmsg+0x284/0x33c) from [] (inet_recvmsg+0x38/0x4c): net/ipv4/udp.c:1234 sin->sin_addr.s_addr = ip_hdr(skb)->saddr; Unaligned access trap (virtual address c14fe63a), so either sin or ip_hdr(skb) are not on a 32bit alignment Can you produce the disassembly of the trapping instruction ? (Is is a read at address c14fe63a, or a write ...) Thanks.