From mboxrd@z Thu Jan 1 00:00:00 1970 From: george anzinger Subject: Net work bug. More info. Date: Thu, 20 Jun 2002 15:05:18 -0700 Sender: owner-netdev@oss.sgi.com Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="------------894BCFCAFA669B25CFEC7187" Return-path: To: "David S. Miller" , kuznet@ms2.inr.ac.ru, netdev@oss.sgi.com, linux-net@vger.kernel.org, ak@muc.de, pekkas@netcore.fi, "Cress, Andrew R" , mark Orvek , Tim Anderson , mhuth@mvista.com, dfarnsworth@mvista.com, minyard@mvista.com List-Id: netdev.vger.kernel.org This is a multi-part message in MIME format. --------------894BCFCAFA669B25CFEC7187 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit We have been looking more closely at the failure. Attached is a gdb log... As turns out, the failure is actually one level lower than tcp_v4_destroy_sock() in __kfree_skb(). It attempts to call a destructor which has a bogus address. The failing instruction is the call *(reg). tcp_writequeue_purge(sk)-> tcp_free_skb(sk, skb)-> __kfree_skb() The attached log has the sk and the "bad" skb as rendered by gdb. -- George Anzinger george@mvista.com High-res-timers: http://sourceforge.net/projects/high-res-timers/ Real time sched: http://sourceforge.net/projects/rtsched/ Preemption patch: http://www.kernel.org/pub/linux/kernel/people/rml --------------894BCFCAFA669B25CFEC7187 Content-Type: application/x-zip-compressed; name="jun19info.ZIP" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="jun19info.ZIP" UEsDBBQAAAAIANeL1CzYhm30qREAAE87AAANAAAAanVuMTlpbmZvLnR4dMU7a2/dNpbfDfg/ EG4GtVM7EfW+aeJB0ckMig2y2KCL+VJAoCTK1vpeSdHDdmr4v+85JEWRlBy3KRZ7iyb3Hp4X z5uicnx0elXmZ2Tqjo++o4R494Xnx0kSUVI3ZCy67DbMSj6MffslG9rihpwON+8AK6Fx6Mfe 2fERgQ8byetp6F8PffF6XzfT/YX/KnxFk4ufP/z6um6K/VTy1w0fXwPHV9dvaJwEx0f4JzE+ WXZT9Zxnw00OQvKzH4+Vch15OdwcH72IyTvyULKy7OFL6IWh5yUxjc9JX9xmg4aD9rHvhek5 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