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authorJason A. Donenfeld <Jason@zx2c4.com>2017-06-07 22:44:54 -0400
committerTheodore Ts'o <tytso@mit.edu>2017-06-19 22:06:28 -0400
commitae5b806a3d3c23d9d3b57aecbe687a0bd82ab086 (patch)
treeb5d8eb3b6f2d986cb3733ad19561a63961de0f93 /net/ceph/ceph_common.c
parent6787ab81b29115b6d2e7d17fe8a8017da66197d6 (diff)
ceph: ensure RNG is seeded before using
Ceph uses the RNG for various nonce generations, and it shouldn't accept using bad randomness. So, we wait for the RNG to be properly seeded. We do this by calling wait_for_random_bytes() in a function that is certainly called in process context, early on, so that all subsequent calls to get_random_bytes are necessarily acceptable. Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Cc: Ilya Dryomov <idryomov@gmail.com> Cc: "Yan, Zheng" <zyan@redhat.com> Cc: Sage Weil <sage@redhat.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'net/ceph/ceph_common.c')
-rw-r--r--net/ceph/ceph_common.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 4fd02831beed..26ab58665f77 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -611,7 +611,11 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private)
{
struct ceph_client *client;
struct ceph_entity_addr *myaddr = NULL;
- int err = -ENOMEM;
+ int err;
+
+ err = wait_for_random_bytes();
+ if (err < 0)
+ return ERR_PTR(err);
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (client == NULL)