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authorChris Wright <chrisw@sous-sol.org>2010-08-10 18:02:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 08:59:18 -0700
commitb7300b78d1a87625975a799a109a2f98d77757c8 (patch)
tree8cf263c09daf725ee701b0acd7ad700c530a5f08 /init/Kconfig
parente400c28524af2d344b1663b27bf28984fa959a0e (diff)
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blkdev: cgroup whitelist permission fix
The cgroup device whitelist code gets confused when trying to grant permission to a disk partition that is not currently open. Part of blkdev_open() includes __blkdev_get() on the whole disk. Basically, the only ways to reliably allow a cgroup access to a partition on a block device when using the whitelist are to 1) also give it access to the whole block device or 2) make sure the partition is already open in a different context. The patch avoids the cgroup check for the whole disk case when opening a partition. Addresses https://bugzilla.redhat.com/show_bug.cgi?id=589662 Signed-off-by: Chris Wright <chrisw@sous-sol.org> Acked-by: Serge E. Hallyn <serue@us.ibm.com> Tested-by: Serge E. Hallyn <serue@us.ibm.com> Reported-by: Vivek Goyal <vgoyal@redhat.com> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: "Daniel P. Berrange" <berrange@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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