This is a note to let you know that I've just added the patch titled
crypto: ccp - fix memleak in ccp_init_dm_workarea
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
crypto-ccp-fix-memleak-in-ccp_init_dm_workarea.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit db3fd3cdb319103bfa3a0c52234fc8bad605bd02
Author: Dinghao Liu <dinghao.liu@xxxxxxxxxx>
Date: Mon Nov 27 11:47:10 2023 +0800
crypto: ccp - fix memleak in ccp_init_dm_workarea
[ 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@xxxxxxxxxx>
Acked-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index aa4e1a500691..cb8e99936abb 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -179,8 +179,11 @@ 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;
}
