On Wed, May 31, 2023 at 06:58:10PM +0800, Herbert Xu wrote: > On Tue, May 30, 2023 at 03:48:49PM -0700, Kees Cook wrote: > > On Tue, 23 May 2023 10:33:04 +0200, Arnd Bergmann wrote: > > > From: Arnd Bergmann <arnd@xxxxxxxx> > > > > > > Commit df8fc4e934c1 ("kbuild: Enable -fstrict-flex-arrays=3") uncovered > > > a type mismatch in cesa 3des support that leads to a memcpy beyond the > > > end of a structure: > > > > > > In function 'fortify_memcpy_chk', > > > inlined from 'mv_cesa_des3_ede_setkey' at drivers/crypto/marvell/cesa/cipher.c:307:2: > > > include/linux/fortify-string.h:583:25: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning] > > > 583 | __write_overflow_field(p_size_field, size); > > > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > [...] > > > > Applied to for-next/hardening, thanks! > > > > [1/1] crypto: marvell/cesa - Fix type mismatch warning > > https://git.kernel.org/kees/c/37f3abddda8d > > Why did you apply it to your tree? This patch makes sense on its > own regardless of the fortify changes. I snagged it since a week had gone by with no additional discussion and it fixed an issue exposed by work in the hardening tree. Let me know if you'd prefer I drop it for you to carry instead. -Kees -- Kees Cook