diff options
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/microcode/amd.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index 5775dc996df3..66490ff087d9 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -186,8 +186,7 @@ __verify_patch_section(const u8 *buf, size_t buf_size, u32 *sh_psize, bool early * exceed the per-family maximum). @sh_psize is the size read from the section * header. */ -static unsigned int -__verify_patch_size(u8 family, u32 sh_psize, unsigned int buf_size) +static unsigned int __verify_patch_size(u8 family, u32 sh_psize, size_t buf_size) { u32 max_size; @@ -285,10 +284,10 @@ verify_patch(u8 family, const u8 *buf, size_t buf_size, u32 *patch_size, bool ea * Returns the amount of bytes consumed while scanning. @desc contains all the * data we're going to use in later stages of the application. */ -static ssize_t parse_container(u8 *ucode, ssize_t size, struct cont_desc *desc) +static size_t parse_container(u8 *ucode, size_t size, struct cont_desc *desc) { struct equiv_cpu_entry *eq; - ssize_t orig_size = size; + size_t orig_size = size; u32 *hdr = (u32 *)ucode; u16 eq_id; u8 *buf; @@ -366,15 +365,18 @@ out: */ static void scan_containers(u8 *ucode, size_t size, struct cont_desc *desc) { - ssize_t rem = size; - - while (rem >= 0) { - ssize_t s = parse_container(ucode, rem, desc); + while (size) { + size_t s = parse_container(ucode, size, desc); if (!s) return; - ucode += s; - rem -= s; + /* catch wraparound */ + if (size >= s) { + ucode += s; + size -= s; + } else { + return; + } } } |