On Wed, Mar 25, 2009 at 12:23:59PM -0400, Josh Boyer wrote: >On powerpc64 machines running 32-bit userspace, we can get garbage bits in the >stack pointer passed into the kernel. Most places handle this correctly, but >the signal handling code uses the passed value directly for allocating signal >stack frames. > >This fixes the issue by introducing a get_clean_sp function that returns a >sanitized stack pointer. For 32-bit tasks on a 64-bit kernel, the stack >pointer is masked correctly. In all other cases, the stack pointer is simply >returned. > >Additionally, we pass an 'is_32' parameter to get_sigframe now in order to >get the properly sanitized stack. The callers are know to be 32 or 64-bit >statically. > >Signed-off-by: Josh Boyer <[email protected]>
Ben, this should look familiar. It's based on your current -next branch. If you agree, I can send it to the -stable team for .27, .28 and .29. josh _______________________________________________ Linuxppc-dev mailing list [email protected] https://ozlabs.org/mailman/listinfo/linuxppc-dev
