[U-Boot] [PATCH] efi_loader: fix off-by-one bug in efi_get_variable

[Ivan Gorinov]

efi_get_variable() always stores an extra zero byte after the output data.
When the returned data size matches the output buffer size, the extra zero
byte is stored past the end of the output buffer.

Signed-off-by: Ivan Gorinov <ivan.gorinov at intel.com>
---
 lib/efi_loader/efi_variable.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 6c177da..d031338 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -68,11 +68,11 @@ static const char *hex2mem(u8 *mem, const char *hexstr, int count)
 	do {
 		int nibble;
 
-		*mem = 0;
-
 		if (!count || !*hexstr)
 			break;
 
+		*mem = 0;
+
 		nibble = hex(*hexstr);
 		if (nibble < 0)
 			break;
-- 
2.7.4