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 Note for stable: 2.6.38 and later only Cc: stable@kernel.org 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>
parent
ea6949b6
Please register or sign in to comment