[v3,14/27] staging: ccree: handle end of sg list gracefully

Message ID 1515327285-8948-15-git-send-email-gilad@benyossef.com
State Accepted
Commit 6e92010b012116d10a3750c0406e3da67f274498
Headers show
Series
  • staging: ccree: fixes and cleanups
Related show

Commit Message

Gilad Ben-Yossef Jan. 7, 2018, 12:14 p.m.
If we are asked for number of entries of an offset bigger than the
sg list we should not crash.

Cc: stable@vger.kernel.org
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>

---
 drivers/staging/ccree/ssi_buffer_mgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.7.4

Patch

diff --git a/drivers/staging/ccree/ssi_buffer_mgr.c b/drivers/staging/ccree/ssi_buffer_mgr.c
index 78288ed..0f71264 100644
--- a/drivers/staging/ccree/ssi_buffer_mgr.c
+++ b/drivers/staging/ccree/ssi_buffer_mgr.c
@@ -94,7 +94,7 @@  static unsigned int cc_get_sgl_nents(struct device *dev,
 {
 	unsigned int nents = 0;
 
-	while (nbytes) {
+	while (nbytes && sg_list) {
 		if (sg_list->length) {
 			nents++;
 			/* get the number of bytes in the last entry */