On Fri, Mar 29, 2024 at 07:05:37PM -0700, Kees Cook wrote:
On Fri, Mar 29, 2024 at 08:37:40AM -0400, Sasha Levin wrote:
From: Kees Cook <keescook@xxxxxxxxxxxx>
[ Upstream commit d4be85d068b4418c341f79b654399f7f0891069a ]
The UBSAN instrumentation cannot work in the vDSO since it is executing
in userspace, so disable it in the Makefile. Fixes the build failures
such as:
arch/sparc/vdso/vclock_gettime.c:217: undefined reference to `__ubsan_handle_shift_out_of_bounds'
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20240224073617.GA2959352@xxxxxxxxxxxx
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
This is harmless to backport, but doesn't do anything. (The UBSAN
changes needing this are only in Linus's tree.)
I'll drop this and the rest of the ubsan commits you've pointed out,
thanks!
--
Thanks,
Sasha
