Re: [PATCH v3 09/17] treewide: Change list_sort to use const pointers
From: Kees Cook <hidden>
Date: 2021-03-26 04:36:15
Also in:
bpf, linux-arch, linux-hardening, linux-kbuild, linux-pci, lkml
On Tue, Mar 23, 2021 at 01:39:38PM -0700, Sami Tolvanen wrote:
list_sort() internally casts the comparison function passed to it to a different type with constant struct list_head pointers, and uses this pointer to call the functions, which trips indirect call Control-Flow Integrity (CFI) checking. Instead of removing the consts, this change defines the list_cmp_func_t type and changes the comparison function types of all list_sort() callers to use const pointers, thus avoiding type mismatches. Suggested-by: Nick Desaulniers <redacted> Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <redacted> -- Kees Cook _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel