From: Toke Høiland-Jørgensen toke@redhat.com
[ Upstream commit 71e67c3bd127cfe7863f54e4b087eba1cc8f9a7a ]
The FQ implementation used by mac80211 allocates memory using kmalloc(), which can fail; and Johannes reported that this actually happens in practice.
To avoid this, switch the allocation to kvmalloc() instead; this also brings fq_impl in line with all the FQ qdiscs.
Fixes: 557fc4a09803 ("fq: add fair queuing framework") Reported-by: Johannes Berg johannes@sipsolutions.net Signed-off-by: Toke Høiland-Jørgensen toke@redhat.com Link: https://lore.kernel.org/r/20191105155750.547379-1-toke@redhat.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/fq_impl.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/net/fq_impl.h b/include/net/fq_impl.h index 89a012905ef0b..4b3e18ff8e6f2 100644 --- a/include/net/fq_impl.h +++ b/include/net/fq_impl.h @@ -312,7 +312,7 @@ static int fq_init(struct fq *fq, int flows_cnt) fq->limit = 8192; fq->memory_limit = 16 << 20; /* 16 MBytes */
- fq->flows = kcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL); + fq->flows = kvcalloc(fq->flows_cnt, sizeof(fq->flows[0]), GFP_KERNEL); if (!fq->flows) return -ENOMEM;
@@ -330,7 +330,7 @@ static void fq_reset(struct fq *fq, for (i = 0; i < fq->flows_cnt; i++) fq_flow_reset(fq, &fq->flows[i], free_func);
- kfree(fq->flows); + kvfree(fq->flows); fq->flows = NULL; }