Patch "vgaarb: fix signal handling in vga_get()" has been added to the 3.14-stable tree

Patch "vgaarb: fix signal handling in vga_get()" has been added to the 3.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    vgaarb: fix signal handling in vga_get()

to the 3.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     vgaarb-fix-signal-handling-in-vga_get.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9f5bd30818c42c6c36a51f93b4df75a2ea2bd85e Mon Sep 17 00:00:00 2001
From: "Kirill A. Shutemov" <kirill@shutemov.name>
Date: Mon, 30 Nov 2015 04:17:31 +0200
Subject: vgaarb: fix signal handling in vga_get()

From: Kirill A. Shutemov <kirill@shutemov.name>

commit 9f5bd30818c42c6c36a51f93b4df75a2ea2bd85e upstream.

There are few defects in vga_get() related to signal hadning:

  - we shouldn't check for pending signals for TASK_UNINTERRUPTIBLE
    case;

  - if we found pending signal we must remove ourself from wait queue
    and change task state back to running;

  - -ERESTARTSYS is more appropriate, I guess.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/vga/vgaarb.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/gpu/vga/vgaarb.c
+++ b/drivers/gpu/vga/vgaarb.c
@@ -392,8 +392,10 @@ int vga_get(struct pci_dev *pdev, unsign
 		set_current_state(interruptible ?
 				  TASK_INTERRUPTIBLE :
 				  TASK_UNINTERRUPTIBLE);
-		if (signal_pending(current)) {
-			rc = -EINTR;
+		if (interruptible && signal_pending(current)) {
+			__set_current_state(TASK_RUNNING);
+			remove_wait_queue(&vga_wait_queue, &wait);
+			rc = -ERESTARTSYS;
 			break;
 		}
 		schedule();


Patches currently in stable-queue which might be from kirill@shutemov.name are

queue-3.14/vgaarb-fix-signal-handling-in-vga_get.patch