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    Subject[PATCH 4.19 56/57] libceph: allow ceph_buffer_put() to receive a NULL ceph_buffer
    Date
    [ Upstream commit 5c498950f730aa17c5f8a2cdcb903524e4002ed2 ]

    Signed-off-by: Luis Henriques <lhenriques@suse.com>
    Reviewed-by: Jeff Layton <jlayton@kernel.org>
    Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    include/linux/ceph/buffer.h | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/include/linux/ceph/buffer.h b/include/linux/ceph/buffer.h
    index 5e58bb29b1a36..11cdc7c60480f 100644
    --- a/include/linux/ceph/buffer.h
    +++ b/include/linux/ceph/buffer.h
    @@ -30,7 +30,8 @@ static inline struct ceph_buffer *ceph_buffer_get(struct ceph_buffer *b)

    static inline void ceph_buffer_put(struct ceph_buffer *b)
    {
    - kref_put(&b->kref, ceph_buffer_release);
    + if (b)
    + kref_put(&b->kref, ceph_buffer_release);
    }

    extern int ceph_decode_buffer(struct ceph_buffer **b, void **p, void *end);
    --
    2.20.1


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