It turns out that the check which generates the panic here is likely invalid, and the code will handle the situation just fine, so the check can be removed. I've prepared a kernel with removes that check (and a related one), which I've temporarily replaced with a warning for testing so we can detect that the condition has been encountered. Please test this kernel and wait for a similar message and stack trace to appear in dmesg, and confirm that other than the appearance of the warning everything continues working fine. Thanks!
http://people.canonical.com/~sforshee/lp1278531/linux-3.13.0-14.34+lp1278531v201402280817/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1275879 Title: Kernel panic Status in “linux” package in Ubuntu: Incomplete Bug description: I run ubuntu servers 13.04, 13.10, and 14.04 on the AWS cloud. Whenever I install haproxy and nginx on the same server, after hitting it for a while, a kernel panic is caused. However, the kernel panic does not show up in ubuntu 12.04. The kernel panic is pasted at the end of the attachment. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1275879/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp