[nasm:master] outieee: fix segfault on empty input
nasm-bot for H. Peter Anvin
hpa at zytor.com
Wed Dec 7 10:54:07 PST 2022
Commit-ID: c8af73112027fad0ecbb277e9cba257678c405af
Gitweb: http://repo.or.cz/w/nasm.git?a=commitdiff;h=c8af73112027fad0ecbb277e9cba257678c405af
Author: H. Peter Anvin <hpa at zytor.com>
AuthorDate: Wed, 7 Dec 2022 10:23:46 -0800
Committer: H. Peter Anvin <hpa at zytor.com>
CommitDate: Wed, 7 Dec 2022 10:24:14 -0800
outieee: fix segfault on empty input
Fix the IEEE backend crashing if the input file is empty.
Signed-off-by: H. Peter Anvin <hpa at zytor.com>
---
output/outieee.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/output/outieee.c b/output/outieee.c
index 878a17a4..7ba90366 100644
--- a/output/outieee.c
+++ b/output/outieee.c
@@ -1,6 +1,6 @@
/* ----------------------------------------------------------------------- *
*
- * Copyright 1996-2016 The NASM Authors - All Rights Reserved
+ * Copyright 1996-2022 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
@@ -936,7 +936,7 @@ static void ieee_write_file(void)
* Write the section headers
*/
seg = seghead;
- if (!debuginfo && !strcmp(seg->name, "??LINE"))
+ if (!debuginfo && seg && !strcmp(seg->name, "??LINE"))
seg = seg->next;
while (seg) {
char buf[256];
@@ -971,7 +971,7 @@ static void ieee_write_file(void)
/*
* write the start address if there is one
*/
- if (ieee_entry_seg) {
+ if (ieee_entry_seg && seghead) {
for (seg = seghead; seg; seg = seg->next)
if (seg->index == ieee_entry_seg)
break;
@@ -1084,7 +1084,7 @@ static void ieee_write_file(void)
* put out section data;
*/
seg = seghead;
- if (!debuginfo && !strcmp(seg->name, "??LINE"))
+ if (!debuginfo && seg && !strcmp(seg->name, "??LINE"))
seg = seg->next;
while (seg) {
if (seg->currentpos) {
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