On 4/21/20 2:38 AM, AKASHI Takahiro wrote:

"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@linaro.org Reported-by: Heinrich Schuchardt xypron.glpk@gmx.de

Reviewed-by: Heinrich Schuchardt xypron.glpk@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");