Cong Wang <xiyou.wangc...@gmail.com> wrote: > > CPU: 0 PID: 23859 Comm: syz-executor2 Not tainted 4.14.0-rc5+ #140 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > > Google 01/01/2011 > > Call Trace: > > __dump_stack lib/dump_stack.c:16 [inline] > > dump_stack+0x194/0x257 lib/dump_stack.c:52 > > lockdep_rcu_suspicious+0x123/0x170 kernel/locking/lockdep.c:4665 > > __in_dev_get_rtnl include/linux/inetdevice.h:230 [inline] > > fib_dump_info+0x1136/0x13d0 net/ipv4/fib_semantics.c:1377 > > inet_rtm_getroute+0xf97/0x2d70 net/ipv4/route.c:2785 > > This is introduced by: > > commit 394f51abb3d04f33fb798f04b16ae6b0491ea4ec > Author: Florian Westphal <f...@strlen.de> > Date: Tue Aug 15 16:34:44 2017 +0200 > > ipv4: route: set ipv4 RTM_GETROUTE to not use rtnl > > Signed-off-by: Florian Westphal <f...@strlen.de> > Signed-off-by: David S. Miller <da...@davemloft.net> > > Looks like we need a wrapper for rcu_dereference_protected(dev->ip_ptr).
Yes, thats the alternative to https://patchwork.ozlabs.org/patch/833401/ which switches to _rcu version.
