If scomp_acomp_comp_decomp() fails to allocate memory for the
destination then we never copy back the data we compressed.
It is probably best to return an error code instead 0 in case of
failure.
I haven't found any user that is using acomp_request_set_params()
without the `dst' buffer so there is probably no harm.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
crypto/scompress.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/crypto/scompress.c b/crypto/scompress.c
index 6f8305f8c3004..aea1a8e5d1954 100644
--- a/crypto/scompress.c
+++ b/crypto/scompress.c
@@ -171,8 +171,10 @@ static int scomp_acomp_comp_decomp(struct acomp_req *req, int dir)
if (!ret) {
if (!req->dst) {
req->dst = sgl_alloc(req->dlen, GFP_ATOMIC, NULL);
- if (!req->dst)
+ if (!req->dst) {
+ ret = -ENOMEM;
goto out;
+ }
}
scatterwalk_map_and_copy(scratch_dst, req->dst, 0, req->dlen,
1);
--
2.20.1
