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cypto: mediatek - fix leaks in mtk_desc_ring_alloc 

[ Upstream commit 228d284aac ]

In the init loop, if an error occurs in function 'dma_alloc_coherent',
then goto the err_cleanup section, after run i--,
in the array ring, the struct mtk_ring with index i will not be released,
causing memory leaks

Fixes: 785e5c616c ("crypto: mediatek - Add crypto driver support for some MediaTek chips")
Cc: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Xiaoliang Pang <dawning.pang@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Xiaoliang Pang 2020-09-14 11:00:51 +08:00 committed by Greg Kroah-Hartman
parent cc0f250409
commit 7fb271426a
1 changed files with 2 additions and 2 deletions
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4
drivers/crypto/mediatek/mtk-platform.c
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@ -469,13 +469,13 @@ static int mtk_desc_ring_alloc(struct mtk_cryp *cryp)
return 0;
err_cleanup:
for (; i--; ) {
do {
dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ,
ring[i]->res_base, ring[i]->res_dma);
dma_free_coherent(cryp->dev, MTK_DESC_RING_SZ,
ring[i]->cmd_base, ring[i]->cmd_dma);
kfree(ring[i]);
}
} while (i--);
return -ENOMEM;
}