[PATCH 1/3] crypto: Fix potential leak in test_aead_speed() if aad_size is too big

Christian Engelmayer
2014-04-21T18:51:56Z

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Fix a potential memory leak in the error handling of test_aead_speed(). In case
the size check on the associate data length parameter fails, the function goes
through the wrong exit label. Reported by Coverity - CID 1163870.

Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
---
crypto/tcrypt.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index 870be7b..1856d7f 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -282,6 +282,11 @@ static void test_aead_speed(const char *algo, int enc, unsigned int sec,
unsigned int *b_size;
unsigned int iv_len;

+ if (aad_size >= PAGE_SIZE) {
+ pr_err("associate data length (%u) too big\n", aad_size);
+ return;
+ }
+
if (enc == ENCRYPT)
e = "encryption";
else
@@ -323,14 +328,7 @@ static void test_aead_speed(const char *algo, int enc, unsigned int sec,
b_size = aead_sizes;
do {
assoc = axbuf[0];
-
- if (aad_size < PAGE_SIZE)
- memset(assoc, 0xff, aad_size);
- else {
- pr_err("associate data length (%u) too big\n",
- aad_size);
- goto out_nosg;
- }
+ memset(assoc, 0xff, aad_size);
sg_init_one(&asg[0], assoc, aad_size);

if ((*keysize + *b_size) > TVMEMSIZE * PAGE_SIZE) {
--
1.9.1

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