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Date: Sat, 5 Mar 2022 12:43:23 -0800 From: Max Filippov <jcmvbkbc@...il.com> To: Kees Cook <keescook@...omium.org> Cc: Chris Zankel <chris@...kel.net>, "open list:TENSILICA XTENSA PORT (xtensa)" <linux-xtensa@...ux-xtensa.org>, linux-hardening@...r.kernel.org Subject: Re: How large is the xtensa pt_regs::areg array supposed to be? Hi Kees, On Wed, Feb 2, 2022 at 3:03 PM Kees Cook <keescook@...omium.org> wrote: > When building with -Warray-bounds, I see this: > > In file included from ./include/linux/uaccess.h:11, > from ./include/linux/sched/task.h:11, > from arch/xtensa/kernel/process.c:21: > arch/xtensa/kernel/process.c: In function 'copy_thread': > arch/xtensa/kernel/process.c:262:52: warning: array subscript 53 is above array bounds of 'long unsigned int[16]' [-Warray-bounds] I tried to reproduce this by building with -Warray-bounds added to KBUILD_CFLAGS but couldn't get neither gcc-11 nor the current gcc trunk to issue this warning. How did you get it? -- Thanks. -- Max
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