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ceph: fix dereference of null pointer cf
Currently in the case where kmem_cache_alloc fails the null pointer
cf is dereferenced when assigning cf->is_capsnap = false. Fix this
by adding a null pointer check and return path.
Cc: stable@vger.kernel.org
Addresses-Coverity: ("Dereference null return")
Fixes: b2f9fa1f3b
("ceph: correctly handle releasing an embedded cap flush")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
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@ -1736,6 +1736,9 @@ struct ceph_cap_flush *ceph_alloc_cap_flush(void)
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struct ceph_cap_flush *cf;
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cf = kmem_cache_alloc(ceph_cap_flush_cachep, GFP_KERNEL);
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if (!cf)
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return NULL;
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cf->is_capsnap = false;
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return cf;
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}
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