Re: [PATCH] net: initialize local variables in net/ipv6/mcast.c and net/ipv4/igmp.c

On Fri, Apr 02, 2021 at 07:49:44PM +0200, Eric Dumazet wrote:

On 4/2/21 7:36 PM, Phillip Potter wrote:

quoted

Use memset to initialize two local buffers in net/ipv6/mcast.c,
and another in net/ipv4/igmp.c. Fixes a KMSAN found uninit-value
bug reported by syzbot at:
https://syzkaller.appspot.com/bug?id=0766d38c656abeace60621896d705743aeefed51

According to this link, the bug no longer triggers.

Please explain why you think it is still there.

Dear Eric,

It definitely still triggers, tested it on the master branch of
https://github.com/google/kmsan last night. The patch which fixes the
crash on that page is the same patch I've sent in.

Regards,
Phil