Signed-off-by: Heloise <o...@iscas.ac.cn>
In is_valid_state(), there is NULL validation for the variable nc
"if (nc)". However,the code will continue to execute when nc is NULL.
nc->verify_alg[0] is used in subsequent code, which may cause
null-pointer dereference, fix it.
---
drivers/block/drbd/drbd_state.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c
index eea0c4a..1963b83 100644
--- a/drivers/block/drbd/drbd_state.c
+++ b/drivers/block/drbd/drbd_state.c
@@ -845,7 +845,7 @@ is_valid_state(struct drbd_device *device, union drbd_state
ns)
rv = SS_CONNECTED_OUTDATES;
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
- (nc->verify_alg[0] == 0))
+ (nc != NULL && nc->verify_alg[0] == 0))
rv = SS_NO_VERIFY_ALG;
else if ((ns.conn == C_VERIFY_S || ns.conn == C_VERIFY_T) &&
--
2.1.0
