elfops: fix potential crashing bug in load_symbols()

get_section() returned an undefined section size on failure,
which could cause load_symbols() to crash if kernel symtables
were missing from the module.

get_section() will now return secsize == 0 if it fails.

Signed-off-by: Andreas Robinson <andr345@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/elfops_core.c b/elfops_core.c
index 1e8083b..051e7f7 100644
--- a/elfops_core.c
+++ b/elfops_core.c
@@ -36,6 +36,8 @@ static void *PERBIT(get_section)(struct elf_file *module,
 	const char *secnames;
 	unsigned int i;
 
+	*secsize = 0;
+
 	if (len <= 0 || len < sizeof(*hdr))
 		return NULL;
 
@@ -65,7 +67,6 @@ static void *PERBIT(get_section)(struct elf_file *module,
 			return data + secoffset;
 		}
 	}
-	*secsize = 0;
 	return NULL;
 }