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| author | Hangyu Hua <hbh25y@gmail.com> | 2024-06-03 15:13:03 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-06-05 10:50:19 +0100 |
| commit | affc18fdc694190ca7575b9a86632a73b9fe043d (patch) | |
| tree | 8a6a1c3557ce53857aecb2d83fe9dadfb6997f6a /net | |
| parent | 491aee894a08bc9b8bb52e7363b9d4bc6403f363 (diff) | |
| download | linux-affc18fdc694190ca7575b9a86632a73b9fe043d.tar.gz linux-affc18fdc694190ca7575b9a86632a73b9fe043d.tar.bz2 linux-affc18fdc694190ca7575b9a86632a73b9fe043d.zip | |
net: sched: sch_multiq: fix possible OOB write in multiq_tune()
q->bands will be assigned to qopt->bands to execute subsequent code logic
after kmalloc. So the old q->bands should not be used in kmalloc.
Otherwise, an out-of-bounds write will occur.
Fixes: c2999f7fb05b ("net: sched: multiq: don't call qdisc_put() while holding tree lock")
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Acked-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/sched/sch_multiq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c index 79e93a19d5fa..06e03f5cd7ce 100644 --- a/net/sched/sch_multiq.c +++ b/net/sched/sch_multiq.c @@ -185,7 +185,7 @@ static int multiq_tune(struct Qdisc *sch, struct nlattr *opt, qopt->bands = qdisc_dev(sch)->real_num_tx_queues; - removed = kmalloc(sizeof(*removed) * (q->max_bands - q->bands), + removed = kmalloc(sizeof(*removed) * (q->max_bands - qopt->bands), GFP_KERNEL); if (!removed) return -ENOMEM; |