From 6dada600ab3579296c9b2b57cf41b95792f021ed Mon Sep 17 00:00:00 2001 From: "Jan Alexander Steffens (heftig)" Date: Sat, 13 Jan 2024 15:29:25 +0100 Subject: arch/Kconfig: Default to maximum amount of ASLR bits To mitigate CVE-2024-26621 and improve randomization quality further. Do this with a patch to avoid having to enable `CONFIG_EXPERT`. Cherry-picked-for: https://zolutal.github.io/aslrnt/ --- arch/Kconfig | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1137,7 +1137,7 @@ config ARCH_MMAP_RND_BITS int "Number of bits to use for ASLR of mmap base address" if EXPERT range ARCH_MMAP_RND_BITS_MIN ARCH_MMAP_RND_BITS_MAX default ARCH_MMAP_RND_BITS_DEFAULT if ARCH_MMAP_RND_BITS_DEFAULT - default ARCH_MMAP_RND_BITS_MIN + default ARCH_MMAP_RND_BITS_MAX depends on HAVE_ARCH_MMAP_RND_BITS help This value can be used to select the number of bits to use to @@ -1171,7 +1171,7 @@ config ARCH_MMAP_RND_COMPAT_BITS int "Number of bits to use for ASLR of mmap base address for compatible applications" if EXPERT range ARCH_MMAP_RND_COMPAT_BITS_MIN ARCH_MMAP_RND_COMPAT_BITS_MAX default ARCH_MMAP_RND_COMPAT_BITS_DEFAULT if ARCH_MMAP_RND_COMPAT_BITS_DEFAULT - default ARCH_MMAP_RND_COMPAT_BITS_MIN + default ARCH_MMAP_RND_COMPAT_BITS_MAX depends on HAVE_ARCH_MMAP_RND_COMPAT_BITS help This value can be used to select the number of bits to use to