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btrfs: read entire device info under lock
authorDavid Sterba <dsterba@suse.cz>
Fri, 26 Apr 2013 15:20:23 +0000 (15:20 +0000)
committerJosef Bacik <jbacik@fusionio.com>
Mon, 6 May 2013 19:55:25 +0000 (15:55 -0400)
commit55793c0d0381176e727389325d9a47f7f0b5387f
tree580c9b7f5562e314bf13a8cdb92b342bc17db75atree
parentf7a52a40cabea38b99b5053bc4f7cf45f4997603commit | diff
btrfs: read entire device info under lock

There's a theoretical possibility of reading stale (or even more
theoretically, freed) data from DEV_INFO ioctl when the device would
disappear between an early mutex unlock and data being copied from the
device structure.

Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
fs/btrfs/ioctl.c diff | blob | blame | history
Ubuntu Disco kernel mirror for Proxmox VE and PMG