diff options
| author | Manfred Spraul <manfred@colorfullife.com> | 2014-12-02 15:59:34 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-12-03 09:36:03 -0800 |
| commit | e8577d1f0329d4842e8302e289fb2c22156abef4 (patch) | |
| tree | f16f344a3d414db2a0d848b7ca19470b468c902e /kernel/cgroup_freezer.c | |
| parent | 92788ac1eb06e69a822de45e2a8a63fa45eb5be2 (diff) | |
ipc/sem.c: fully initialize sem_array before making it visible
ipc_addid() makes a new ipc identifier visible to everyone. New objects
start as locked, so that the caller can complete the initialization
after the call. Within struct sem_array, at least sma->sem_base and
sma->sem_nsems are accessed without any locks, therefore this approach
doesn't work.
Thus: Move the ipc_addid() to the end of the initialization.
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Reported-by: Rik van Riel <riel@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Davidlohr Bueso <dave@stgolabs.net>
Acked-by: Rafael Aquini <aquini@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/cgroup_freezer.c')
0 files changed, 0 insertions, 0 deletions