Re: [PATCH 4/4] selftests/exec: add test for HWCAP inheritance
Kees Cook <[email protected]> Thu, 12 Feb 2026 15:57:27 -0800
| Newsgroups | dev.linux.lists.criu,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kvack.linux-mm |
|---|---|
| Message-ID | <202602121557.5C1249F@keescook> |
On Mon, Feb 09, 2026 at 07:06:05PM +0000, Andrei Vagin wrote: > Verify that HWCAPs are correctly inherited/preserved across execve() when > modified via prctl(PR_SET_MM_AUXV). > > The test performs the following steps: > * reads the current AUXV using prctl(PR_GET_AUXV); > * finds an HWCAP entry and toggles its most significant bit; > * replaces the AUXV of the current process with the modified one using > prctl(PR_SET_MM, PR_SET_MM_AUXV); > * executes itself to verify that the new program sees the modified HWCAP > value. > > Signed-off-by: Andrei Vagin <[email protected]> Reviewed-by: Kees Cook <[email protected]> -- Kees Cook