4.19-stable review patch. If anyone has any objections, please let me know.
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From: Dinghao Liu dinghao.liu@zju.edu.cn
[ 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: 63b945091a07 ("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 --- drivers/crypto/ccp/ccp-ops.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c index 453d27d2a4ff..56c571370486 100644 --- a/drivers/crypto/ccp/ccp-ops.c +++ b/drivers/crypto/ccp/ccp-ops.c @@ -183,8 +183,11 @@ 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; }