From: Sumit Garg <sumit.garg@linaro.org>
To: jens.wiklander@linaro.org
Cc: Sumit Garg <sumit.garg@linaro.org>,
linux-arm-kernel@lists.infradead.org, dan.carpenter@oracle.com,
linux-kernel@vger.kernel.org
Subject: [PATCH -next] tee: fix possible error pointer ctx dereferencing
Date: Wed, 20 Feb 2019 11:32:27 +0530 [thread overview]
Message-ID: <1550642547-21968-1-git-send-email-sumit.garg@linaro.org> (raw)
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@oracle.com>
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
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
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next reply other threads:[~2019-02-20 6:03 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 6:02 Sumit Garg [this message]
2019-02-22 8:09 ` [PATCH -next] tee: fix possible error pointer ctx dereferencing Jens Wiklander
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