15 Oct
2024
15 Oct
'24
10:56 a.m.
On Mon, 14 Oct 2024 at 22:59, Kees Cook kees@kernel.org wrote:
On Wed, Oct 09, 2024 at 02:43:53PM +0200, Ard Biesheuvel wrote:
However, if a non-TLS definition of the symbol in question is visible in the same compilation unit (which amounts to the whole of vmlinux if LTO is enabled), it will drop the per-CPU prefix and emit a load from a bogus address.
I take this to mean that x86 32-bit kernels built with the stack protector and using Clang LTO will crash very quickly?
Yeah. The linked issue is not quite clear, but it does suggest things are pretty broken in that case.