diff options
| author |   Rafael Aquini <aquini@redhat.com> | 2014-01-27 17:07:01 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-27 21:02:39 -0800 |
| commit | 0f3d2b0135f4bdbfe47a99753923a64efd373d11 (patch) | |
| tree | 4b211b7502e2412aedd94400bdcb012a2b5814b3 /ipc/ipc_sysctl.c | |
| parent | ipc/sem.c: avoid overflow of semop undo (semadj) value (diff) | |
| download | linux-dev-0f3d2b0135f4bdbfe47a99753923a64efd373d11.tar.xz linux-dev-0f3d2b0135f4bdbfe47a99753923a64efd373d11.zip | |
ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races
After the locking semantics for the SysV IPC API got improved, a couple
of IPC_RMID race windows were opened because we ended up dropping the
'kern_ipc_perm.deleted' check performed way down in ipc_lock(). The
spotted races got sorted out by re-introducing the old test within the
racy critical sections.
This patch introduces ipc_valid_object() to consolidate the way we cope
with IPC_RMID races by using the same abstraction across the API
implementation.
Signed-off-by: Rafael Aquini <aquini@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Greg Thelen <gthelen@google.com>
Reviewed-by: Davidlohr Bueso <davidlohr@hp.com>
Cc: Manfred Spraul <manfred@colorfullife.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'ipc/ipc_sysctl.c')
0 files changed, 0 insertions, 0 deletions