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crypto: ccp - fix memleak in ccp_init_dm_workarea

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[ Upstream commit a1c95dd5bc1d6a5d7a75a376c2107421b7d6240d ]

When dma_map_single() fails, wa->address is supposed to be freed
by the callers of ccp_init_dm_workarea() through ccp_dm_free().
However, many of the call spots don't expect to have to call
ccp_dm_free() on failure of ccp_init_dm_workarea(), which may
lead to a memleak. Let's free wa->address in ccp_init_dm_workarea()
when dma_map_single() fails.

Fixes: 63b945091a ("crypto: ccp - CCP device driver and interface support")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dinghao Liu 2023-11-27 11:47:10 +08:00 committed by Greg Kroah-Hartman
parent 9fffae6cc4
commit ca3484d5ca
1 changed files with 4 additions and 1 deletions
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5
drivers/crypto/ccp/ccp-ops.c
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@ -178,8 +178,11 @@ static int ccp_init_dm_workarea(struct ccp_dm_workarea *wa,
wa->dma.address = dma_map_single(wa->dev, wa->address, len,
dir);
if (dma_mapping_error(wa->dev, wa->dma.address))
if (dma_mapping_error(wa->dev, wa->dma.address)) {
kfree(wa->address);
wa->address = NULL;
return -ENOMEM;
}
wa->dma.length = len;
}