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 <stable@xxxxxxxxxxxxxxx> know about it.
>From ff06db1efb2ad6db06eb5b99b88a0c15a9cc9b0e Mon Sep 17 00:00:00 2001
From: Jiri Kosina <jkosina@xxxxxxx>
Date: Thu, 16 Jun 2016 09:53:58 +0200
Subject: floppy: fix open(O_ACCMODE) for ioctl-only open
From: Jiri Kosina <jkosina@xxxxxxx>
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.
Reported-by: Wim Osterholt <wim@xxxxxxxxxxxxxx>
Tested-by: Wim Osterholt <wim@xxxxxxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/block/floppy.c | 21 +++++++++------------
1 file changed, 9 insertions(+), 12 deletions(-)
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -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 jkosina@xxxxxxx 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
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