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From 60698263122b7c54ded3f70a466176e17a529480 Mon Sep 17 00:00:00 2001
From: Robbie Harwood <rharwood@redhat.com>
Date: Wed, 28 Jul 2021 14:23:32 -0400
Subject: [PATCH] nis: Fix leak on realloc failure in nis_getnames [BZ #28150]
If pos >= count but realloc fails, tmp will not have been placed in
getnames[pos] yet, and so will not be freed in free_null. Detected
by Coverity.
Also remove misleading comment from nis_getnames(), since it actually
did properly release getnames when out of memory.
Tested-by: Carlos O'Donell <carlos@redhat.com>
---
nis/nis_subr.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/nis/nis_subr.c b/nis/nis_subr.c
index dd0e300..6784fc3 100644
--- a/nis/nis_subr.c
+++ b/nis/nis_subr.c
@@ -103,9 +103,6 @@ count_dots (const_nis_name str)
return count;
}
-/* If we run out of memory, we don't give already allocated memory
- free. The overhead for bringing getnames back in a safe state to
- free it is to big. */
nis_name *
nis_getnames (const_nis_name name)
{
@@ -271,7 +268,10 @@ nis_getnames (const_nis_name name)
nis_name *newp = realloc (getnames,
(count + 1) * sizeof (char *));
if (__glibc_unlikely (newp == NULL))
- goto free_null;
+ {
+ free (tmp);
+ goto free_null;
+ }
getnames = newp;
}
getnames[pos] = tmp;
--
1.8.3.1
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