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Date: Wed, 02 Jul 2014 23:54:08 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: punnaiah choudary kalluri <punnaia@...inx.com> Cc: davem@...emloft.net, netdev@...r.kernel.org Subject: Re: Kernel BUG while sending data on 10mbps halfduplex link On Thu, 2014-07-03 at 09:07 +0530, punnaiah choudary kalluri wrote: > Hi, > > While sending the data traffic on zynq development board using 10 mbps > half-duplex link, observed the kernel BUG in skbuff handling. > > Zynq setup: > ifconfig eth0 192.186.1.2 > > Host machine setup: > ifconfig eth0 192.186.1.3 > ethtool -s eth0 speed 10 duplex half > tcpreplay -i eth0 kernelpaniccapturejune24.pcap > > Any pointers/directions for finding the root cause for this issue ? > > root@...q:~# [ 128.841470] random: nonblocking pool is initialized > [ 141.726352] skbuff: skb_over_panic: text:c031b890 len:16383 > put:16383 head:eea80000 data:eea80040 tail:0xeea8403f end:0xeea80640 > dev:eth0 > [ 141.726354] ------------[ cut here ]------------ > [ 141.726354] kernel BUG at net/core/skbuff.c:126! > [ 141.726355] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM > [ 141.726356] Modules linked in: ipv6 > [ 141.726357] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-xilinx #1 > [ 141.726358] task: c06af670 ti: c06a4000 task.ti: c06a4000 > [ 141.726358] PC is at skb_panic+0x50/0x5c > [ 141.726359] LR is at skb_panic+0x50/0x5c > [ 141.726360] pc : [<c0494d68>] lr : [<c0494d68>] psr: 60070113 > [ 141.726360] sp : c06a5de8 ip : c07b8da8 fp : 2ea80040 > [ 141.726362] r10: ef10b810 r9 : c06af344 r8 : 00000000 > [ 141.726362] r7 : c05d39c4 r6 : eea80000 r5 : eea80040 r4 : eea8403f > [ 141.726364] r3 : c06af670 r2 : 00000000 r1 : 60070113 r0 : 0000007d > [ 141.726365] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM > Segment kernel > [ 141.726366] Control: 18c5387d Table: 2e9c404a DAC: 00000015 > [ 141.726367] Process swapper/0 (pid: 0, stack limit = 0xc06a4240) > [ 141.726368] Stack: (0xc06a5de8 to 0xc06a6000) > > Regards, Kernel stack trace would be useful. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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