diff options
| author | Tejun Heo <tj@kernel.org> | 2011-04-29 10:15:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-23 15:24:01 -0700 |
| commit | 5b2745db12a3f97a9ec9efd4ffa077da707d3e4c (patch) | |
| tree | 6237c4a8dc17084677c6b7d7ebecee628a26af50 /lib/iomap.c | |
| parent | 24fb3f4cf3de9955eae325d421047c0f2dd6b48f (diff) | |
block: rescan partitions on invalidated devices on -ENOMEDIA too
commit 02e352287a40bd456eb78df705bf888bc3161d3f upstream.
__blkdev_get() doesn't rescan partitions if disk->fops->open() fails,
which leads to ghost partition devices lingering after medimum removal
is known to both the kernel and userland. The behavior also creates a
subtle inconsistency where O_NONBLOCK open, which doesn't fail even if
there's no medium, clears the ghots partitions, which is exploited to
work around the problem from userland.
Fix it by updating __blkdev_get() to issue partition rescan after
-ENOMEDIA too.
This was reported in the following bz.
https://bugzilla.kernel.org/show_bug.cgi?id=13029
Stable: 2.6.38
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: David Zeuthen <zeuthen@gmail.com>
Reported-by: Martin Pitt <martin.pitt@ubuntu.com>
Reported-by: Kay Sievers <kay.sievers@vrfy.org>
Tested-by: Kay Sievers <kay.sievers@vrfy.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'lib/iomap.c')
0 files changed, 0 insertions, 0 deletions