Re: [PATCH 1/3] binfmt_elf_fdpic: fix AUXV size calculation for ELF_HWCAP3 and ELF_HWCAP4

Mark Brown <[email protected]> Thu, 8 Jan 2026 11:31:46 +0000

Newsgroups	dev.linux.lists.criu,org.kernel.vger.linux-fsdevel,org.kernel.vger.linux-kernel,org.kvack.linux-mm
Message-ID	<[email protected]>

On Thu, Jan 08, 2026 at 05:07:46AM +0000, Andrei Vagin wrote:
> Commit 4e6e8c2b757f ("binfmt_elf: Wire up AT_HWCAP3 at AT_HWCAP4") added
> support for AT_HWCAP3 and AT_HWCAP4, but it missed updating the AUX
> vector size calculation in create_elf_fdpic_tables() and
> AT_VECTOR_SIZE_BASE in include/linux/auxvec.h.
> 
> Similar to the fix for ELF_HWCAP2 in commit c6a09e342f8e
> ("binfmt_elf_fdpic: fix AUXV size calculation when ELF_HWCAP2 is defined"),
> this omission leads to a mismatch between the reserved space and the
> actual number of AUX entries, eventually triggering a kernel BUG_ON(csp != sp).

Sorry, missed fdpic here:

Reviewed-by: Mark Brown <[email protected]>

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