tree 18caba988f1fb650bb804727de06adc73953b2c6
parent fec11dd9a0109fe52fd631e5c510778d6cbff6cc
author Linus Torvalds <torvalds@linux-foundation.org> 1311029009 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1311137341 -0700

vfs: fix race in rcu lookup of pruned dentry

Don't update *inode in __follow_mount_rcu() until we'd verified that
there is mountpoint there.  Kudos to Hugh Dickins for catching that
one in the first place and eventually figuring out the solution (and
catching a braino in the earlier version of patch).

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>