3.2.12 BUG during modprobe on x86_64 if CONFIG_DEBUG_SET_MODULE_RONX set in kernel

[Valdis Kletnieks]

A heads-up for possible kernel incompatibility coming down the pipe...

Recent linux-next (targeting the 2.6.38 release) development kernels include an extension to allow modules to also be set to RO/NX status. It looks like the problem is that g_abExecMemory is defined with permission bits 'awx'. I haven't studied it enough to tell if redefining it with other permissions will suffice, or if you'll need to open-code the unset_section_ro_nx() function from the patch, or if it should be a permanent restriction that SET_MODULE_RONX=n has to be in the kernel config, or some other solution.

The problematic patch is here: ​http://git.kernel.org/tip/84e1c6bb38eb318e456558b610396d9f1afaabf0

I've attached the ugly details of the crash

[Valdis Kletnieks]

dmesg of kernel BUG with CONFIG_DEBUG_SET_MODULE_RONX

[Klaus Espenlaub]

The reporter guessed on IRC that 2.6.38 would be finished early April, and the Fedora guys seem to agree (they're planning to include it in FC15, and talk about early April as well).

[Frank Mehnert]

This bug was actually fixed in VBox 4.0.