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From: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
To: andrew.donnellan@au1.ibm.com, linuxppc-dev@lists.ozlabs.org,
	vaibhav@linux.vnet.ibm.com, clombard@linux.vnet.ibm.com,
	philippe.bergheaud@fr.ibm.com
Subject: [PATCH] cxl: Fix error path on bad ioctl
Date: Fri,  2 Jun 2017 18:15:23 +0200	[thread overview]
Message-ID: <20170602161523.14052-1-fbarrat@linux.vnet.ibm.com> (raw)

Fix error path if we can't copy user structure on
CXL_IOCTL_START_WORK ioctl.

Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Cc: stable@vger.kernel.org
---
 drivers/misc/cxl/file.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c
index 17b433f1ce23..caa44adfa60e 100644
--- a/drivers/misc/cxl/file.c
+++ b/drivers/misc/cxl/file.c
@@ -160,10 +160,8 @@ static long afu_ioctl_start_work(struct cxl_context *ctx,
 	/* Do this outside the status_mutex to avoid a circular dependency with
 	 * the locking in cxl_mmap_fault() */
 	if (copy_from_user(&work, uwork,
-			   sizeof(struct cxl_ioctl_start_work))) {
-		rc = -EFAULT;
-		goto out;
-	}
+			   sizeof(struct cxl_ioctl_start_work)))
+		return -EFAULT;
 
 	mutex_lock(&ctx->status_mutex);
 	if (ctx->status != OPENED) {
-- 
2.11.0

             reply	other threads:[~2017-06-02 16:16 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-02 16:15 Frederic Barrat [this message]
2017-06-02 16:31 ` [PATCH] cxl: Fix error path on bad ioctl Vaibhav Jain
2017-06-05  1:43 ` Andrew Donnellan
2017-06-06  9:20 ` Michael Ellerman
2017-06-06  9:30   ` Frederic Barrat
2017-06-07 11:43     ` Michael Ellerman

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