From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Date: Thu, 5 Oct 2017 11:40:54 +0800 > On Tue, Oct 03, 2017 at 07:45:06PM -0300, Marcelo Ricardo Leitner wrote: >> >> > Usually if you're invoking setkey from a non-sleeping code-path >> > you're probably doing something wrong. >> >> Usually but not always. There are 3 calls to that function on SCTP >> code: >> - pack a cookie, which is sent on an INIT_ACK packet to the client >> - unpack the cookie above, after it is sent back by the client on a >> COOKIE_ECHO packet >> - send a chunk authenticated by a hash > > I'm not talking about the code-path in question. I'm talking > about the function which generates the secret key in the first > place. AFAICS that's only called in GFP_KERNEL context. What > am I missing? The setkey happens in functions like sctp_pack_cookie() and sctp_unpack_cookie(), which seems to run from software interrupts.
