On 26/2/20 5:35 pm, Russell Currey wrote:
There are a couple of reasons that the set_memory() functions are problematic when STRICT_KERNEL_RWX isn't enabled:- The linear mapping is a different size and apply_to_page_range() may modify a giant section, breaking everything - patch_instruction() doesn't know to work around a page being marked RO, and will subsequently crash The latter can be replicated by building a kernel with the set_memory() patches but with STRICT_KERNEL_RWX off and running ftracetest. Reported-by: Jordan Niethe <jniet...@gmail.com> Signed-off-by: Russell Currey <rus...@russell.cc>
Can we squash this in earlier in the series for the sake of bisectability? -- Andrew Donnellan OzLabs, ADL Canberra a...@linux.ibm.com IBM Australia Limited
