On Wed, May 29, 2019 at 05:14:17PM +0200, Dmitry Vyukov wrote: > > > It looks like > > > > ommit 1515a63fc413f160d20574ab0894e7f1020c7be2 > > Author: Nikolay Aleksandrov <nikolay@xxxxxxxxxxxxxxxxxxx> > > Date: Wed Apr 3 23:27:24 2019 +0300 > > > > net: bridge: always clear mcast matching struct on reports and leaves > > > > may have at least fixed the uninitialised value error. > > > The most up-to-date info is always available here: > > >> dashboard link: https://syzkaller.appspot.com/bug?extid=bc5ab0af2dbf3b0ae897 > > It says no new crashes happened besides the original one. > > We now have the following choices: > > 1. Invalidate with "#syz invalid" > 2. Mark as tentatively fixed by that commit (could it fix it?) with > "#syz fix: net: bridge: always clear mcast matching struct on reports > and leaves" > 3. Do nothing, then syzbot will auto-close it soon (bugs without > reproducers that did not happen in the past 180 days) I'm still not quite sure how this could cause the use-after-free, but it certainly seems to be the cause for the second issue of uninit-value: https://syzkaller.appspot.com/bug?extid=8dfe5ee27aa6d2e396c2 And this one does seem to have occured again recently (two months ago). Thanks, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
