On Wed, May 13, 2020 at 5:48 PM Arvind Sankar <nivedita@xxxxxxxxxxxx> wrote: > > On Wed, May 13, 2020 at 09:50:03AM +0300, Kalle Valo wrote: > > And now I have a problem :) I first noticed that my x86 testbox is not > > booting when I compile the kernel with GCC 10.1.0 from crosstool. I > > didn't get any error messages so I just downgraded the compiler and the > > kernel was booting fine again. Next I decided to try GCC 10.1 with my > > x86 laptop and it also failed to boot, but this time I got kernel logs > > and saw this: > > > > Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: start_secodary+0x178/0x180 > > > > See https://lore.kernel.org/lkml/20200423161126.GD26021@xxxxxxx/ Thanks! I see the patch in linux-next but not in mainline. I suppose we want it in v5.7 and backported to stable kernels so they can boot when built with gcc-10? I suppose the only reason that the other architectures don't run into the problem is that they don't call boot_init_stack_canary() in start_secondary() though they probably should? Arnd
