[PATCH] size: Fix deref-of-null in handle_ar() function

[Maks Mishin]

Pointer, returned from function 'elf_getarhdr' at size.c:362,
may be NULL and is dereferenced at size.c:367.

Signed-off-by: Maks Mishin <maks.mishinFZ@gmail.com>
---
 src/size.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/size.c b/src/size.c
index ff8ca075..d6bce203 100644
--- a/src/size.c
+++ b/src/size.c
@@ -361,6 +361,16 @@ handle_ar (int fd, Elf *elf, const char *prefix, const char *fname)
       /* The the header for this element.  */
       Elf_Arhdr *arhdr = elf_getarhdr (subelf);
 
+      if (arhdr == NULL)
+  {
+    printf ("cannot get archive header in '%s': %s\n",
+      fname, elf_errmsg (-1));
+    elf_end (subelf);
+    elf_end (elf);
+    close (fd);
+    return 1;
+  }
+
       if (elf_kind (subelf) == ELF_K_ELF)
 	handle_elf (subelf, new_prefix, arhdr->ar_name);
       else if (likely (elf_kind (subelf) == ELF_K_AR))
-- 
2.30.2