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Possible null-pointer dereference

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The value should be dereferenced after
assertion is performed. This can lead
to crash

(cherry picked from commit 7eba14cb76)
This commit is contained in:
Mikhail Lappo 2017-03-22 22:06:21 +01:00 committed by goldsimon
parent 77c12bb124
commit dbb3b3a3a1
1 changed files with 2 additions and 1 deletions
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3
src/apps/mqtt/mqtt.c
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@ -360,8 +360,9 @@ mqtt_take_request(struct mqtt_request_t **tail, u16_t pkt_id)
static void static void
mqtt_request_time_elapsed(struct mqtt_request_t **tail, u8_t t) mqtt_request_time_elapsed(struct mqtt_request_t **tail, u8_t t)
{ {
struct mqtt_request_t *r = *tail; struct mqtt_request_t *r;
LWIP_ASSERT("mqtt_request_time_elapsed: tail != NULL", tail != NULL); LWIP_ASSERT("mqtt_request_time_elapsed: tail != NULL", tail != NULL);
r = *tail;
while (t > 0 && r != NULL) { while (t > 0 && r != NULL) {
if (t >= r->timeout_diff) { if (t >= r->timeout_diff) {
t -= (u8_t)r->timeout_diff; t -= (u8_t)r->timeout_diff;