On Tue, Sep 13, 2016 at 10:18:54AM +0200, Stephan Mueller wrote: > Am Montag, 12. September 2016, 14:43:45 CEST schrieb Stephan Mueller: > > Hi Herbert, > > > Hi Herbert, > > > > after getting the AIO code working on sendmsg, tried it with vmsplice/splice > > and I get a memory corruption. Interestingly, the stack trace is partially > > garbled too. Thus, tracking this one down may be a bit of a challenge. > > The issue is a NULL pointer dereference in skcipher_free_async_sgls. The issue is that SGs may not have even a page mapped to them and thus the page entry is NULL. > > The following patch fixes the issue and replaces the patch I sent earlier. This patch appears to be papering over a real bug. The async path should be exactly the same as the sync path, except that we don't wait for completion. So the question is why are we getting this crash here for async but not sync? Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
