[PATCH -next] tee: fix possible error pointer ctx dereferencing
From: Sumit Garg
Date: Wed Feb 20 2019 - 01:02:56 EST
Add check for valid ctx pointer and then only dereference ctx to
configure supp_nowait flag.
Fixes: 42bf4152d8a7 ("tee: add supp_nowait flag in tee_context struct")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Sumit Garg <sumit.garg@xxxxxxxxxx>
---
drivers/tee/tee_core.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c
index 25f3b9c..06fbfc0 100644
--- a/drivers/tee/tee_core.c
+++ b/drivers/tee/tee_core.c
@@ -993,7 +993,9 @@ tee_client_open_context(struct tee_context *start,
* tee_client_open_session() if any in kernel client requires
* different behaviour.
*/
- ctx->supp_nowait = true;
+ if (!IS_ERR(ctx))
+ ctx->supp_nowait = true;
+
return ctx;
}
EXPORT_SYMBOL_GPL(tee_client_open_context);
--
2.7.4