Change in osmo-ggsn[master]: fix allocation of ippool's hash table

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Stefan Sperling gerrit-no-reply at lists.osmocom.org
Wed Nov 21 13:38:32 UTC 2018


Stefan Sperling has uploaded this change for review. ( https://gerrit.osmocom.org/11858


Change subject: fix allocation of ippool's hash table
......................................................................

fix allocation of ippool's hash table

The calloc() call in ippool_new() had two problems.

The first problem is benign: The order of arguments were reversed.
Pass the number of elements in the array first, then the size of
each element, as calloc() expects.
This problem was found by me. There are more instances of this
problem in this file, which I'll address in follow-up patches.

The second problem is that the requested allocation was larger than
necessary: The hash table is an array of pointers to ippoolm_t, not
an array of struct ippoolm_t. Fix the required size passed to calloc().
This problem was found by Coverity.

Change-Id: I93fa5bc539771ca19714f6a665558c9140e2ce07
Related: CID#57920
---
M lib/ippool.c
1 file changed, 2 insertions(+), 3 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-ggsn refs/changes/58/11858/1

diff --git a/lib/ippool.c b/lib/ippool.c
index 6561f1f..6ce3cda 100644
--- a/lib/ippool.c
+++ b/lib/ippool.c
@@ -276,9 +276,8 @@
 	(*this)->hashmask = (*this)->hashsize - 1;
 
 	/* Allocate hash table */
-	if (!
-	    ((*this)->hash =
-	     calloc(sizeof(struct ippoolm_t), (*this)->hashsize))) {
+	(*this)->hash = calloc((*this)->hashsize, sizeof(struct ippoolm_t *));
+	if (!(*this)->hash) {
 		SYS_ERR(DIP, LOGL_ERROR, 0,
 			"Failed to allocate memory for hash members in ippool");
 		return -1;

-- 
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Gerrit-Project: osmo-ggsn
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I93fa5bc539771ca19714f6a665558c9140e2ce07
Gerrit-Change-Number: 11858
Gerrit-PatchSet: 1
Gerrit-Owner: Stefan Sperling <ssperling at sysmocom.de>
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