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authorHerbert Xu <herbert@gondor.apana.org.au>2017-03-14 18:25:57 +0800
committerDavid S. Miller <davem@davemloft.net>2017-03-21 14:38:15 -0700
commit8a0f5ccfb33b0b8b51de65b7b3bf342ba10b4fb6 (patch)
tree7ee2aabab355f030568c83095f1c13d455e1b564 /net/vmw_vsock
parent98d068ab52b4b11d403995ed14154660797e7136 (diff)
crypto: deadlock between crypto_alg_sem/rtnl_mutex/genl_mutex
On Tue, Mar 14, 2017 at 10:44:10AM +0100, Dmitry Vyukov wrote: > > Yes, please. > Disregarding some reports is not a good way long term. Please try this patch. ---8<--- Subject: netlink: Annotate nlk cb_mutex by protocol Currently all occurences of nlk->cb_mutex are annotated by lockdep as a single class. This causes a false lcokdep cycle involving genl and crypto_user. This patch fixes it by dividing cb_mutex into individual classes based on the netlink protocol. As genl and crypto_user do not use the same netlink protocol this breaks the false dependency loop. Reported-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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