path: root/fs/fat/file.c
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authorAl Viro <>2015-04-24 15:47:07 -0400
committerAl Viro <>2015-04-24 15:52:14 -0400
commit3cab989afd8d8d1bc3d99fef0e7ed87c31e7b647 (patch)
treec696367810e2e603c3156127b6fb0eb4627a7132 /fs/fat/file.c
parentac74d8d65c83d8061034d0908e1eab6a0c24f923 (diff)
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: # since 2.6.39 Signed-off-by: Al Viro <>
Diffstat (limited to 'fs/fat/file.c')
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