When two adjacent TX SGL are processed and parts of both TX SGLs
are pulled into the per-request TX SGL, the wrong per-request
TX SGL entries were updated.
This fixes a NULL pointer dereference when a cipher implementation walks
the TX SGL where some of the SGL entries were NULL.
Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx>
---
crypto/af_alg.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index ffa9f4ccd9b4..337cf382718e 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -619,14 +619,14 @@ void af_alg_pull_tsgl(struct sock *sk, size_t used, struct scatterlist *dst,
struct af_alg_ctx *ctx = ask->private;
struct af_alg_tsgl *sgl;
struct scatterlist *sg;
- unsigned int i, j;
+ unsigned int i, j = 0;
while (!list_empty(&ctx->tsgl_list)) {
sgl = list_first_entry(&ctx->tsgl_list, struct af_alg_tsgl,
list);
sg = sgl->sg;
- for (i = 0, j = 0; i < sgl->cur; i++) {
+ for (i = 0; i < sgl->cur; i++) {
size_t plen = min_t(size_t, used, sg[i].length);
struct page *page = sg_page(sg + i);
--
2.13.5
