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authorMiao Xie <miaox@cn.fujitsu.com>2014-09-03 13:35:42 (GMT)
committerChris Mason <clm@fb.com>2014-09-17 20:38:43 (GMT)
commitadbbb8631beda8e4e5d2c964b8b47e04cfa0a2ae (patch)
tree4ee13e368464d455415919b0d52ca75defa4ff3e /fs/f2fs
parent2196d6e8a71fc901e31c1d81581fc6cc6c64913e (diff)
downloadlinux-adbbb8631beda8e4e5d2c964b8b47e04cfa0a2ae.tar.xz
Btrfs: fix unprotected device list access when cloning fs devices
We can build a new filesystem based a seed filesystem, and we need clone the fs devices when we open the new filesystem. But someone might clear the seed flag of the seed filesystem, then mount that filesystem and remove some device. If we mount the new filesystem, we might access a device list which was being changed when we clone the fs devices. Fix it. Signed-off-by: Miao Xie <miaox@cn.fujitsu.com> Signed-off-by: Chris Mason <clm@fb.com>
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