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author | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-24 22:47:07 +0300 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-04-24 22:52:14 +0300 |
commit | 3cab989afd8d8d1bc3d99fef0e7ed87c31e7b647 (patch) | |
tree | c696367810e2e603c3156127b6fb0eb4627a7132 /fs/nilfs2/gcinode.c | |
parent | ac74d8d65c83d8061034d0908e1eab6a0c24f923 (diff) | |
download | linux-3cab989afd8d8d1bc3d99fef0e7ed87c31e7b647.tar.xz |
RCU pathwalk breakage when running into a symlink overmounting something
Calling unlazy_walk() in walk_component() and do_last() when we find
a symlink that needs to be followed doesn't acquire a reference to vfsmount.
That's fine when the symlink is on the same vfsmount as the parent directory
(which is almost always the case), but it's not always true - one _can_
manage to bind a symlink on top of something. And in such cases we end up
with excessive mntput().
Cc: stable@vger.kernel.org # since 2.6.39
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/nilfs2/gcinode.c')
0 files changed, 0 insertions, 0 deletions