From: Alan Modra <amodra@gmail.com>
Date: Wed, 26 Aug 2020 10:58:40 +0000 (+0930)
Subject: PR26508 UBSAN: tc-xtensa.c:7764 null pointer bsearch
X-Git-Url: https://git.efficios.com/?a=commitdiff_plain;h=e637b7ba2f8399ba94721be3f1765b471b6a67c2;p=deliverable%2Fbinutils-gdb.git

PR26508 UBSAN: tc-xtensa.c:7764 null pointer bsearch

	PR 26508
	* config/tc-xtensa.c (xg_get_trampoline_chain): Return early
	when n_entries is zero.
---

diff --git a/gas/ChangeLog b/gas/ChangeLog
index c56b992685..c0d9b26a29 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,9 @@
+2020-08-26  Alan Modra  <amodra@gmail.com>
+
+	PR 26508
+	* config/tc-xtensa.c (xg_get_trampoline_chain): Return early
+	when n_entries is zero.
+
 2020-08-26  Alan Modra  <amodra@gmail.com>
 
 	PR 26448
diff --git a/gas/config/tc-xtensa.c b/gas/config/tc-xtensa.c
index 82ec439332..af4c66721a 100644
--- a/gas/config/tc-xtensa.c
+++ b/gas/config/tc-xtensa.c
@@ -7753,6 +7753,9 @@ xg_get_trampoline_chain (struct trampoline_seg *ts,
   struct trampoline_chain_index *idx = &ts->chain_index;
   struct trampoline_chain c;
 
+  if (idx->n_entries == 0)
+    return NULL;
+
   if (idx->needs_sorting)
     {
       qsort (idx->entry, idx->n_entries, sizeof (*idx->entry),