Re: net/ipv4: use-after-free in ip_check_mc_rcu

2017-04-10 Thread Cong Wang
On Mon, Apr 10, 2017 at 7:33 AM, Andrey Konovalov wrote: > Hi, > > I've got the following error report while fuzzing the kernel with syzkaller. > > On commit 39da7c509acff13fc8cb12ec1bb20337c988ed36 (4.11-rc6). > > Unfortunately it's not reproducible. > > BUG: KASAN: use-after-free in ip_check_mc_

net/ipv4: use-after-free in ip_check_mc_rcu

2017-04-10 Thread Andrey Konovalov
Hi, I've got the following error report while fuzzing the kernel with syzkaller. On commit 39da7c509acff13fc8cb12ec1bb20337c988ed36 (4.11-rc6). Unfortunately it's not reproducible. BUG: KASAN: use-after-free in ip_check_mc_rcu+0x805/0x8b0 net/ipv4/igmp.c:2645 at addr 880065b21cb8 Read of si