6.6-stable review patch. If anyone has any objections, please let me know.
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From: Jian Shen shenjian15@huawei.com
[ Upstream commit 8ffbd1669ed1d58939d6e878dffaa2f60bf961a4 ]
When ptr_ring_init() returns failure in page_pool_init(), free_percpu() is not called to free pool->recycle_stats, which may cause memory leak.
Fixes: ad6fa1e1ab1b ("page_pool: Add recycle stats") Signed-off-by: Jian Shen shenjian15@huawei.com Signed-off-by: Jijie Shao shaojijie@huawei.com Reviewed-by: Yunsheng Lin linyunsheng@huawei.com Reviewed-by: Jiri Pirko jiri@nvidia.com Reviewed-by: Somnath Kotur somnath.kotur@broadcom.com Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org Link: https://lore.kernel.org/r/20231030091256.2915394-1-shaojijie@huawei.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/core/page_pool.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/net/core/page_pool.c b/net/core/page_pool.c index 77cb75e63aca1..31f923e7b5c40 100644 --- a/net/core/page_pool.c +++ b/net/core/page_pool.c @@ -221,8 +221,12 @@ static int page_pool_init(struct page_pool *pool, return -ENOMEM; #endif
- if (ptr_ring_init(&pool->ring, ring_qsize, GFP_KERNEL) < 0) + if (ptr_ring_init(&pool->ring, ring_qsize, GFP_KERNEL) < 0) { +#ifdef CONFIG_PAGE_POOL_STATS + free_percpu(pool->recycle_stats); +#endif return -ENOMEM; + }
atomic_set(&pool->pages_state_release_cnt, 0);