readelf: check elf_getarhdr returns NULL in dump_archive_index

Report of the static analyzer:
DEREF_OF_NULL.RET Pointer, returned from function 'elf_getarhdr' at
readelf.c:13551, may be NULL and is dereferenced at readelf.c:13553.

    * src/readelf.c (dump_archive_index): Check elf_getarhdr doesn't
    return NULL.

Triggers found by static analyzer Svace.

Signed-off-by: Anton Moryakov <ant.v.moryakov@gmail.com>

diff --git a/src/readelf.c b/src/readelf.c
index da37921602f1b1f250370e2f061d4be4e83b62d1..61d5b71a79132a8bc78c401fe04be48a6ae860b7 100644 (file)
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -13561,8 +13561,8 @@ dump_archive_index (Elf *elf, const char *fname)
                          as_off, fname, elf_errmsg (-1));
 
          const Elf_Arhdr *h = elf_getarhdr (subelf);
-
-         printf (_("Archive member '%s' contains:\n"), h->ar_name);
+         if (h != NULL)
+           printf (_("Archive member '%s' contains:\n"), h->ar_name);
 
          elf_end (subelf);
        }