From: Anatoly Burakov <anatoly.burakov@intel.com>
To: dev@dpdk.org
Cc: thomas@monjalon.net, anatoly.burakov@intel.com
Subject: [dpdk-dev] [PATCH 3/4] fbarray: fix potential null-dereference
Date: Tue, 17 Apr 2018 16:44:07 +0100 [thread overview]
Message-ID: <318dfc6873c14152437a5bae0a4480dabd73254d.1523978190.git.anatoly.burakov@intel.com> (raw)
In-Reply-To: <cover.1523978190.git.anatoly.burakov@intel.com>
In-Reply-To: <cover.1523978190.git.anatoly.burakov@intel.com>
We get pointer to mask before we check if fbarray is NULL. Fix
by moving getting mask pointer to until after NULL check.
Coverity issue: 272579
Fixes: c44d09811b40 ("eal: add shared indexed file-backed array")
Cc: anatoly.burakov@intel.com
Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
lib/librte_eal/common/eal_common_fbarray.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/librte_eal/common/eal_common_fbarray.c b/lib/librte_eal/common/eal_common_fbarray.c
index 95a7c8e..c4ed97e 100644
--- a/lib/librte_eal/common/eal_common_fbarray.c
+++ b/lib/librte_eal/common/eal_common_fbarray.c
@@ -349,7 +349,7 @@ find_contig(const struct rte_fbarray *arr, int start, bool used)
static int
set_used(struct rte_fbarray *arr, int idx, bool used)
{
- struct used_mask *msk = get_used_mask(arr->data, arr->elt_sz, arr->len);
+ struct used_mask *msk;
uint64_t msk_bit = 1ULL << MASK_LEN_TO_MOD(idx);
int msk_idx = MASK_LEN_TO_IDX(idx);
bool already_used;
@@ -359,6 +359,7 @@ set_used(struct rte_fbarray *arr, int idx, bool used)
rte_errno = EINVAL;
return -1;
}
+ msk = get_used_mask(arr->data, arr->elt_sz, arr->len);
ret = 0;
/* prevent array from changing under us */
--
2.7.4
next prev parent reply other threads:[~2018-04-17 15:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-17 15:44 [dpdk-dev] [PATCH 0/4] Fixes for coverity issues in fbarray Anatoly Burakov
2018-04-17 15:44 ` [dpdk-dev] [PATCH 1/4] fbarray: use strlcpy instead of snprintf Anatoly Burakov
2018-04-17 15:44 ` [dpdk-dev] [PATCH 2/4] fbarray: add check for failed file descriptor open Anatoly Burakov
2018-04-17 15:44 ` Anatoly Burakov [this message]
2018-04-17 15:44 ` [dpdk-dev] [PATCH 4/4] fbarray: handle negative return Anatoly Burakov
2018-04-18 8:51 ` [dpdk-dev] [PATCH 0/4] Fixes for coverity issues in fbarray Adrien Mazarguil
2018-04-23 20:16 ` Thomas Monjalon
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