sssd/0008-mmap_cache-Use-stricter-check-for-hash-keys.patch

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2013-08-23 13:41:45 +00:00
From 6a6f9c3a48fbfd7c61cd0c6d0aa9b4bf7bdb5fd6 Mon Sep 17 00:00:00 2001
From: Lukas Slebodnik <lslebodn@redhat.com>
Date: Mon, 19 Aug 2013 07:24:46 +0200
Subject: [PATCH 2/2] mmap_cache: Use stricter check for hash keys.
ht_size is size of hash_table in bytes, but hash keys have type uint32_t
---
src/responder/nss/nsssrv_mmap_cache.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/src/responder/nss/nsssrv_mmap_cache.c b/src/responder/nss/nsssrv_mmap_cache.c
index 522e6fa57640261ff4cc17bf554776d7d905bf7a..c34997b8034d05796687ff7d380b367d5c7bba06 100644
--- a/src/responder/nss/nsssrv_mmap_cache.c
+++ b/src/responder/nss/nsssrv_mmap_cache.c
@@ -168,7 +168,7 @@ static void sss_mc_add_rec_to_chain(struct sss_mc_ctx *mcc,
struct sss_mc_rec *cur;
uint32_t slot;
- if (hash > mcc->ht_size) {
+ if (hash > MC_HT_ELEMS(mcc->ht_size)) {
/* Invalid hash. This should never happen, but better
* return than trying to access out of bounds memory */
return;
@@ -225,9 +225,11 @@ static void sss_mc_rm_rec_from_chain(struct sss_mc_ctx *mcc,
struct sss_mc_rec *cur = NULL;
uint32_t slot;
- if (hash > mcc->ht_size) {
- /* Invalid hash. This should never happen, but better
- * return than trying to access out of bounds memory */
+ if (hash > MC_HT_ELEMS(mcc->ht_size)) {
+ /* It can happen if rec->hash1 and rec->has2 was the same.
+ * or it is invalid hash. It is better to return
+ * than trying to access out of bounds memory
+ */
return;
}
--
1.8.3.1