[PATCH] efi_loader: fixe unreachable statement in efi_sigstore_parse_siglist

[AKASHI Takahiro]

"if (left < esl->signature_size)" is not reachable in a while loop.
But it is still valuable in case that a given signature database is
somehow corrupted. So fix the while loop condition.

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
Reported-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 lib/efi_loader/efi_signature.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_signature.c b/lib/efi_loader/efi_signature.c
index 0ead10203aeb..b392e72fefcd 100644
--- a/lib/efi_loader/efi_signature.c
+++ b/lib/efi_loader/efi_signature.c
@@ -668,7 +668,7 @@ efi_sigstore_parse_siglist(struct efi_signature_list *esl)
 	esd = (struct efi_signature_data *)
 			((u8 *)esl + sizeof(*esl) + esl->signature_header_size);
 
-	while ((left > 0) && left >= esl->signature_size) {
+	while (left > 0) {
 		/* Signature must exist if there is remaining data. */
 		if (left < esl->signature_size) {
 			debug("Certificate is too small\n");
-- 
2.25.2