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authorMax <msuraev@sysmocom.de>2016-11-07 14:49:13 +0100
committerMax <msuraev@sysmocom.de>2016-11-07 15:19:47 +0100
commite9e5f8e4e9aa3fdce06d144381d9621552476387 (patch)
treef1a11ee01ca8c3c7c7a58102f88edc051fc20c6d
parent8b25a3f5c38a9297f9213cb6e70b7599ba999fbe (diff)
Add null-pointer check to osmo_amr_rtp_dec()
Check that RTP payload we're about to decode is not NULL and return proper error code instead of segfaulting. Add corresponding test case. Change-Id: Ib6cda9900a41ed16bbfbde9df3de9d38e0a7469b
-rw-r--r--src/codec/gsm690.c6
-rw-r--r--tests/codec/codec_test.c12
2 files changed, 12 insertions, 6 deletions
diff --git a/src/codec/gsm690.c b/src/codec/gsm690.c
index 0f4bf8fe..c3cb9324 100644
--- a/src/codec/gsm690.c
+++ b/src/codec/gsm690.c
@@ -252,6 +252,9 @@ int osmo_amr_rtp_dec(const uint8_t *rtppayload, int payload_len, uint8_t *cmr,
int8_t *cmi, enum osmo_amr_type *ft,
enum osmo_amr_quality *bfi, int8_t *sti)
{
+ if (payload_len < 2 || !rtppayload)
+ return -EINVAL;
+
/* RFC 4867 ยง 4.4.2 ToC - compound payloads are not supported: F = 0 */
uint8_t type = (rtppayload[1] >> 3) & 0xf;
@@ -262,9 +265,6 @@ int osmo_amr_rtp_dec(const uint8_t *rtppayload, int payload_len, uint8_t *cmr,
if (payload_len - 2 < amr_len_by_ft[type])
return -ENOTSUP;
- if (payload_len < 2)
- return -EINVAL;
-
if (ft)
*ft = type;
diff --git a/tests/codec/codec_test.c b/tests/codec/codec_test.c
index 5b934b13..f944f38b 100644
--- a/tests/codec/codec_test.c
+++ b/tests/codec/codec_test.c
@@ -38,12 +38,17 @@ static const char * cmpr(int a, int b)
static void test_sid_dec(const uint8_t *t, size_t len)
{
- uint8_t cmr, tmp[SID_LEN];
+ uint8_t cmr, tmp[SID_LEN], *t2 = NULL;
enum osmo_amr_type ft;
enum osmo_amr_quality bfi;
int8_t sti, cmi;
- memcpy(tmp, t, SID_LEN);
- int rc = osmo_amr_rtp_dec(tmp, len, &cmr, &cmi, &ft, &bfi, &sti);
+ if (t) {
+ memcpy(tmp, t, SID_LEN);
+ t2 = tmp;
+ }
+ int rc = osmo_amr_rtp_dec(t2, len, &cmr, &cmi, &ft, &bfi, &sti);
+ if (rc < 0)
+ return;
printf("[%d] decode RTP %s%s: FT %s, CMR %s, CMI is %d, SID type %s\t",
rc, osmo_hexdump(tmp, len), cmpr(bfi, AMR_GOOD),
get_value_string(osmo_amr_type_names, ft),
@@ -94,6 +99,7 @@ int main(int argc, char **argv)
printf("AMR RTP payload decoder test:\n");
test_sid_dec(sid_first, 7);
test_sid_dec(sid_update, 7);
+ test_sid_dec(NULL, 7);
test_amr_rt(0, AMR_NO_DATA, AMR_BAD);
test_amr_rt(0, AMR_NO_DATA, AMR_GOOD);
test_amr_rt(AMR_12_2, AMR_12_2, AMR_BAD);