On Wed, Oct 12, 2016 at 7:22 AM, Johannes Berg <johannes@xxxxxxxxxxxxxxxx> wrote: > >> > Can you elaborate on how exactly it kills your system? >> >> the last time I saw it it was a NULL deref at >> ieee80211_aes_ccm_decrypt. > > Hm. I was expecting something within the crypto code would cause the > crash, this seems strange. > > Anyway, I'm surely out of my depth wrt. the actual cause. Something > like the patch below probably works around it, but it's horribly > inefficient due to the locking and doesn't cover CMAC/GMAC either. In a pinch, I have these patches sitting around: https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vmap_stack&id=0a39cfa6fbb5d5635c85253cc7d6b44b54822afd https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/commit/?h=x86/vmap_stack&id=bf8cfa200b5a01383ea39fc8ce2f32909767baa8 I don't like them, though. I think it's rather silly that we can't just pass virtual addresses to the crypto code.
