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| author |   Ian Kent <raven@themaw.net> | 2008-07-23 21:30:26 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-24 10:47:32 -0700 |
| commit | 97e7449a7ad883bf9f516fc970778d75999c7843 (patch) | |
| tree | 903f6de243847eb12d1a372b271b15046ecdc774 /lib | |
| parent | autofs4: fix pending checks (diff) | |
| download | linux-dev-97e7449a7ad883bf9f516fc970778d75999c7843.tar.xz linux-dev-97e7449a7ad883bf9f516fc970778d75999c7843.zip | |
autofs4: fix indirect mount pending expire race
The selection of a dentry for expiration and the setting of the
AUTOFS_INF_EXPIRING flag isn't done atomically which can lead to lookups
walking into an expiring mount.
What happens is that an expire is initiated by the daemon and a dentry is
selected for expire but, since there is no lock held between the selection
and setting of the expiring flag, a process may find the flag clear and
continue walking into the mount tree at the same time the daemon attempts
the expire it.
Signed-off-by: Ian Kent <raven@themaw.net>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions