verify_patch_size() function verifies whether the microcode container file remaining size is large enough to contain a patch of the indicated size.
However, the section header length is not included in this indicated size but it is present in the leftover file length so it should be subtracted from the leftover file length before passing this value to verify_patch_size(). Signed-off-by: Maciej S. Szmigiero <[email protected]> --- arch/x86/kernel/cpu/microcode/amd.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c index a998e1a7d46f..ffe0d0ce57fc 100644 --- a/arch/x86/kernel/cpu/microcode/amd.c +++ b/arch/x86/kernel/cpu/microcode/amd.c @@ -613,7 +613,8 @@ static int verify_and_add_patch(u8 family, u8 *fw, unsigned int leftover) return crnt_size; } - ret = verify_patch_size(family, patch_size, leftover); + ret = verify_patch_size(family, patch_size, + leftover - SECTION_HDR_SIZE); if (!ret) { pr_err("Patch-ID 0x%08x: size mismatch.\n", mc_hdr->patch_id); return crnt_size;
