From ca3f923f82a079dcf441419f4a50a50f8b4b33c2 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Fri, 17 Apr 2020 10:38:16 +0930 Subject: [PATCH] PR25840, Null pointer dereference in objdump PR 25840 * debug.c (debug_class_type_samep): Don't segfault on NULL type. Upstream-Status: Backport [https://sourceware.org/git/?p=binutils-gdb.git;a=patch;h=ca3f923f82a079dcf441419f4a50a50f8b4b33c2] CVE: CVE-2020-16598 Signed-off-by: Chee Yang Lee --- binutils/debug.c | 2 ++ 1 files changed, 2 insertions(+) diff --git a/binutils/debug.c b/binutils/debug.c index 022fa4edffb..5470e155edc 100644 --- a/binutils/debug.c +++ b/binutils/debug.c @@ -3277,6 +3277,8 @@ debug_class_type_samep (struct debug_handle *info, struct debug_type_s *t1, names, since that sometimes fails in the presence of typedefs and we really don't care. */ if (strcmp (f1->name, f2->name) != 0 + || f1->type == NULL + || f2->type == NULL || ! debug_type_samep (info, debug_get_real_type ((void *) info, f1->type, NULL), -- 2.27.0