Date: Mon, 10 Dec 2012 15:10:57 -0800 From: Adrian Chadd <adrian@freebsd.org> To: Garrett Cooper <yanegomi@gmail.com> Cc: freebsd-net@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org> Subject: Re: "Memory modified after free" - by whom? Message-ID: <CAJ-Vmo=MsSV3DhAVEP36d%2BFccHDdQz7%2By7v5xTjYKyBP0PfQoQ@mail.gmail.com> In-Reply-To: <CAGH67wQKUDLQmL8cnWwgzQpWAN2OhKLu0AemPNuy7EOC-i1p9g@mail.gmail.com> References: <CAGH67wQKUDLQmL8cnWwgzQpWAN2OhKLu0AemPNuy7EOC-i1p9g@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
9216 sounds like a jumbo frame mbuf. So the NIC is writing to an mbuf after it's finalised/freed. I have a similar bug showing up on ath(4) RX. :( adrian On 10 December 2012 14:22, Garrett Cooper <yanegomi@gmail.com> wrote: > I noticed this while checking the logs on one of my test boxes > after restarting the network. Any idea where I should start looking > into this (has IPv6 enabled but wasn't using it, em/cxgbe/ixgbe > interfaces with the ixgbe interfaces lagged previously, but now not)? > It looks suspiciously like the same size as a jumbo frame, but I'm not > 100% sure if that's the real problem. > Thanks, > -Garrett > > Dec 10 14:03:12 wf158 kernel: em0: link state changed to DOWN > Dec 10 14:03:13 wf158 kernel: ix0: link state changed to DOWN > Dec 10 14:03:13 wf158 kernel: ix0: link state changed to UP > Dec 10 14:03:13 wf158 kernel: ix1: link state changed to DOWN > Dec 10 14:03:13 wf158 kernel: ix1: link state changed to UP > Dec 10 14:03:13 wf158 kernel: ix0: link state changed to DOWN > Dec 10 14:03:13 wf158 kernel: ix0: link state changed to UP > Dec 10 14:03:15 wf158 kernel: em0: link state changed to UP > Dec 10 14:03:15 wf158 dhclient: New IP Address (em0): 10.7.169.89 > Dec 10 14:03:15 wf158 dhclient: New Subnet Mask (em0): 255.255.240.0 > Dec 10 14:03:15 wf158 dhclient: New Broadcast Address (em0): 10.7.175.255 > Dec 10 14:03:15 wf158 dhclient: New Routers (em0): 10.7.160.1 > Dec 10 14:03:16 wf158 kernel: ix0: link state changed to DOWN > Dec 10 14:03:16 wf158 kernel: ix0: link state changed to UP > Dec 10 14:03:31 wf158 kernel: in6_purgeaddr: err=65, destination > address delete failed > Dec 10 14:03:31 wf158 dhclient[4539]: My address (10.7.169.89) was > deleted, dhclient exiting > Dec 10 14:03:32 wf158 dhclient[4521]: short write: wanted 20 got 0 bytes > Dec 10 14:03:32 wf158 dhclient[4521]: exiting. > Dec 10 14:03:33 wf158 kernel: em0: link state changed to DOWN > Dec 10 14:03:33 wf158 kernel: ix1: link state changed to DOWN > Dec 10 14:03:34 wf158 kernel: ix1: link state changed to UP > Dec 10 14:03:34 wf158 kernel: ix1: link state changed to DOWN > Dec 10 14:03:34 wf158 kernel: ix1: link state changed to UP > Dec 10 14:03:34 wf158 kernel: ix0: link state changed to DOWN > Dec 10 14:03:34 wf158 kernel: ix0: link state changed to UP > Dec 10 14:03:34 wf158 kernel: ix1: link state changed to DOWN > Dec 10 14:03:34 wf158 kernel: ix1: link state changed to UP > Dec 10 14:03:36 wf158 kernel: em0: link state changed to UP > Dec 10 14:03:36 wf158 dhclient: New IP Address (em0): 10.7.169.89 > Dec 10 14:03:36 wf158 dhclient: New Subnet Mask (em0): 255.255.240.0 > Dec 10 14:03:36 wf158 dhclient: New Broadcast Address (em0): 10.7.175.255 > Dec 10 14:03:36 wf158 dhclient: New Routers (em0): 10.7.160.1 > Dec 10 14:05:34 wf158 kernel: Memory modified after free > 0xffffff81c016d000(9216) val=ffffffff @ 0xffffff81c016d000 > Dec 10 14:05:35 wf158 kernel: Memory modified after free > 0xffffff81b5cdc000(9216) val=ffffffff @ 0xffffff81b5cdc000 > > # uname -a > FreeBSD wf158.west.isilon.com 10.0-CURRENT FreeBSD 10.0-CURRENT #1 > r+2760369-dirty: Mon Dec 10 08:04:46 PST 2012 > root@wf158.west.isilon.com:/usr/obj/usr/src/sys/ISI-GENERIC amd64 > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org"
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAJ-Vmo=MsSV3DhAVEP36d%2BFccHDdQz7%2By7v5xTjYKyBP0PfQoQ>