Re: [PATCH net] fib: fib_dump_info can no longer use __in_dev_get_rtnl

2017-11-02 Thread David Miller
From: Florian Westphal Date: Thu, 2 Nov 2017 16:02:20 +0100 > syzbot reported yet another regression added with DOIT_UNLOCKED. > When nexthop is marked as dead, fib_dump_info uses __in_dev_get_rtnl(): > > ./include/linux/inetdevice.h:230 suspicious rcu_dereference_protected() usage! > rcu_sched

[PATCH net] fib: fib_dump_info can no longer use __in_dev_get_rtnl

2017-11-02 Thread Florian Westphal
syzbot reported yet another regression added with DOIT_UNLOCKED. When nexthop is marked as dead, fib_dump_info uses __in_dev_get_rtnl(): ./include/linux/inetdevice.h:230 suspicious rcu_dereference_protected() usage! rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor2/23859: #0: