From 4f0f586bf0c898233d8f316f471a21db2abd522d Mon Sep 17 00:00:00 2001 From: Sami Tolvanen Date: Thu, 8 Apr 2021 11:28:34 -0700 Subject: treewide: Change list_sort to use const pointers 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 Signed-off-by: Sami Tolvanen Reviewed-by: Nick Desaulniers Reviewed-by: Christoph Hellwig Reviewed-by: Kees Cook Tested-by: Nick Desaulniers Tested-by: Nathan Chancellor Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20210408182843.1754385-10-samitolvanen@google.com --- drivers/acpi/numa/hmat.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/acpi/numa') diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c index cb73a5d6ea76..137a5dd880c2 100644 --- a/drivers/acpi/numa/hmat.c +++ b/drivers/acpi/numa/hmat.c @@ -558,7 +558,8 @@ static bool hmat_update_best(u8 type, u32 value, u32 *best) return updated; } -static int initiator_cmp(void *priv, struct list_head *a, struct list_head *b) +static int initiator_cmp(void *priv, const struct list_head *a, + const struct list_head *b) { struct memory_initiator *ia; struct memory_initiator *ib; -- cgit v1.2.3