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| author |   Elena Reshetova <elena.reshetova@intel.com> | 2017-09-08 16:17:38 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:51 -0700 |
| commit | a2e0602c36ed9fe042714694dd5a889ecd8cb556 (patch) | |
| tree | ce02930bac1f418d0920726c061ebeee5ca0ec53 /ipc/msgutil.c | |
| parent | kcov: support compat processes (diff) | |
| download | wireguard-linux-a2e0602c36ed9fe042714694dd5a889ecd8cb556.tar.xz wireguard-linux-a2e0602c36ed9fe042714694dd5a889ecd8cb556.zip | |
ipc: convert ipc_namespace.count from atomic_t to refcount_t
refcount_t type and corresponding API should be used instead of atomic_t
when the variable is used as a reference counter. This allows to avoid
accidental refcounter overflows that might lead to use-after-free
situations.
Link: http://lkml.kernel.org/r/1499417992-3238-2-git-send-email-elena.reshetova@intel.com
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: <arozansk@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
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/msgutil.c')
| -rw-r--r-- | ipc/msgutil.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ipc/msgutil.c b/ipc/msgutil.c index bf74eaa5c39f..84598025a6ad 100644 --- a/ipc/msgutil.c +++ b/ipc/msgutil.c @@ -29,7 +29,7 @@ DEFINE_SPINLOCK(mq_lock); * and not CONFIG_IPC_NS. */ struct ipc_namespace init_ipc_ns = { - .count = ATOMIC_INIT(1), + .count = REFCOUNT_INIT(1), .user_ns = &init_user_ns, .ns.inum = PROC_IPC_INIT_INO, #ifdef CONFIG_IPC_NS |