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| author | Tejun Heo <tj@kernel.org> | 2011-04-29 10:15:20 +0200 |
|---|---|---|
| committer | Jens Axboe <jaxboe@fusionio.com> | 2011-04-29 10:17:26 +0200 |
| commit | 02e352287a40bd456eb78df705bf888bc3161d3f (patch) | |
| tree | aa6462a305d17a52d8a717640bbd558f49f1834e /block/cfq-iosched.c | |
| parent | bf2253a6f00e8fea5b026e471e9f0d0a1b3621f2 (diff) | |
| download | kernel_samsung_smdk4412-02e352287a40bd456eb78df705bf888bc3161d3f.zip kernel_samsung_smdk4412-02e352287a40bd456eb78df705bf888bc3161d3f.tar.gz kernel_samsung_smdk4412-02e352287a40bd456eb78df705bf888bc3161d3f.tar.bz2 | |
block: rescan partitions on invalidated devices on -ENOMEDIA too
__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>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block/cfq-iosched.c')
0 files changed, 0 insertions, 0 deletions