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| author | Elena Reshetova <elena.reshetova@intel.com> | 2017-03-03 11:15:07 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-05-04 09:19:18 +0200 |
| commit | 805692d0e0f7dec42b5e05fb8b2a5c172f66a3c2 (patch) | |
| tree | c12a31d63fa29a8d5dba953d484b835b25a4b71a /fs/ceph/snap.c | |
| parent | 3997c01d260ed00d712b051fdab022a08719441e (diff) | |
| download | linux-0-day-805692d0e0f7dec42b5e05fb8b2a5c172f66a3c2.tar.gz linux-0-day-805692d0e0f7dec42b5e05fb8b2a5c172f66a3c2.tar.xz | |
ceph: convert ceph_cap_snap.nref 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.
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>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/snap.c')
| -rw-r--r-- | fs/ceph/snap.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index 8f8b41c2ef0f7..dab5d6732345b 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -519,7 +519,7 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci) capsnap->need_flush ? "" : "no_flush"); ihold(inode); - atomic_set(&capsnap->nref, 1); + refcount_set(&capsnap->nref, 1); INIT_LIST_HEAD(&capsnap->ci_item); capsnap->follows = old_snapc->seq; |