Patch "floppy: fix open(O_ACCMODE) for ioctl-only open" has been added to the 4.7-stable tree

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

floppy: fix open(O_ACCMODE) for ioctl-only open

to the 4.7-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:
floppy-fix-open-o_accmode-for-ioctl-only-open.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Jiri Kosina <[email protected]>
Date: Thu, 16 Jun 2016 09:53:58 +0200
Subject: floppy: fix open(O_ACCMODE) for ioctl-only open

From: Jiri Kosina <[email protected]>

commit ff06db1efb2ad6db06eb5b99b88a0c15a9cc9b0e upstream.

Commit 09954bad4 ("floppy: refactor open() flags handling"), as a side-effect, causes open(/dev/fdX, O_ACCMODE) to fail. It turns out that this is being used setfdprm userspace for ioctl-only open().

Reintroduce back the original behavior wrt !(FMODE_READ|FMODE_WRITE) modes, while still keeping the original O_NDELAY bug fixed.

---
 drivers/block/floppy.c |   21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

@@ -3663,11 +3663,6 @@ static int floppy_open(struct block_devi
 
 	opened_bdev[drive] = bdev;
 
-	if (!(mode & (FMODE_READ|FMODE_WRITE))) {
-		res = -EINVAL;
-		goto out;
-	}
-
 	res = -ENXIO;
 
 	if (!floppy_track_buffer) {

@@ -3711,13 +3706,15 @@ static int floppy_open(struct block_devi
 	if (UFDCS->rawcmd == 1)
 		UFDCS->rawcmd = 2;
 
-	UDRS->last_checked = 0;
-	clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
-	check_disk_change(bdev);
-	if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
-		goto out;
-	if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
-		goto out;
+	if (mode & (FMODE_READ|FMODE_WRITE)) {
+		UDRS->last_checked = 0;
+		clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags);
+		check_disk_change(bdev);
+		if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags))
+			goto out;
+		if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags))
+			goto out;
+	}
 
 	res = -EROFS;
 

Patches currently in stable-queue which might be from [email protected] are

queue-4.7/floppy-fix-open-o_accmode-for-ioctl-only-open.patch queue-4.7/hid-uhid-fix-timeout-when-probe-races-with-io.patch