[PATCH][next] efi/tpm: fix sanity check of unsigned tbl_size being less than zero

Colin King
2019-10-08T10:01:58Z

From: Colin Ian King <colin.king@canonical.com>

Currently the check for tbl_size being less than zero is always false
because tbl_size is unsigned. Fix this by making it a signed int.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: e658c82be556 ("efi/tpm: Only set 'efi_tpm_final_log_size' after successful event log parsing")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/firmware/efi/tpm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/tpm.c b/drivers/firmware/efi/tpm.c
index 703469c1ab8e..ebd7977653a8 100644
--- a/drivers/firmware/efi/tpm.c
+++ b/drivers/firmware/efi/tpm.c
@@ -40,7 +40,7 @@ int __init efi_tpm_eventlog_init(void)
{
struct linux_efi_tpm_eventlog *log_tbl;
struct efi_tcg2_final_events_table *final_tbl;
- unsigned int tbl_size;
+ int tbl_size;
int ret = 0;

if (efi.tpm_log == EFI_INVALID_TABLE_ADDR) {
--
2.20.1