3.16.50-rc1 review patch. If anyone has any objections, please let me know.
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From: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
commit 30c31d746d0eb458ae327f522bc8e4c44cbea0f0 upstream.
It is very unlikely to happen but the backlogs memory allocation
could fail and will free q->flows, but then ->destroy() will free
q->flows too. For correctness remove the first free and let ->destroy
clean up.
Fixes: 87b60cfacf9f ("net_sched: fix error recovery at qdisc creation")
Signed-off-by: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[bwh: Backported to 3.16: fq_codel used different alloc/free functions]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
net/sched/sch_fq_codel.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -411,10 +411,8 @@ static int fq_codel_init(struct Qdisc *s
if (!q->flows)
return -ENOMEM;
q->backlogs = fq_codel_zalloc(q->flows_cnt * sizeof(u32));
- if (!q->backlogs) {
- fq_codel_free(q->flows);
+ if (!q->backlogs)
return -ENOMEM;
- }
for (i = 0; i < q->flows_cnt; i++) {
struct fq_codel_flow *flow = q->flows + i;