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xsk: Fix null check on error return path

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Currently, dma_map is being checked, when the right object identifier
to be null-checked is dma_map->dma_pages, instead.

Fix this by null-checking dma_map->dma_pages.

Fixes: 921b68692a ("xsk: Enable sharing of dma mappings")
Addresses-Coverity-ID: 1496811 ("Logically dead code")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20200902150750.GA7257@embeddedor
This commit is contained in:
Gustavo A. R. Silva 2020-09-02 10:07:50 -05:00 committed by Daniel Borkmann
parent 968be23cea
commit 1d6fd78a21
1 changed files with 1 additions and 1 deletions
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2
net/xdp/xsk_buff_pool.c
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@ -287,7 +287,7 @@ static struct xsk_dma_map *xp_create_dma_map(struct device *dev, struct net_devi
return NULL;
dma_map->dma_pages = kvcalloc(nr_pages, sizeof(*dma_map->dma_pages), GFP_KERNEL);
if (!dma_map) {
if (!dma_map->dma_pages) {
kfree(dma_map);
return NULL;
}