On Thu, Apr 20, 2017 at 5:28 PM, Andrey Konovalov <andreyk...@google.com> wrote: > I've extracted a reproducer for another bug.
It works for me as is, but you might need to run it in a loop. > > This one seems to be much closer to what Dmitry reported intially. > > ------------[ cut here ]------------ > WARNING: CPU: 1 PID: 3892 at net/ipv6/ip6_fib.c:1472 fib6_del+0xa60/0xdc0 > Modules linked in: > CPU: 1 PID: 3892 Comm: a.out Not tainted 4.11.0-rc7+ #251 > Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:16 > dump_stack+0x292/0x398 lib/dump_stack.c:52 > __warn+0x19f/0x1e0 kernel/panic.c:549 > warn_slowpath_null+0x2c/0x40 kernel/panic.c:584 > fib6_del+0xa60/0xdc0 net/ipv6/ip6_fib.c:1472 > fib6_clean_node+0x3ce/0x550 net/ipv6/ip6_fib.c:1652 > fib6_walk_continue+0x577/0x760 net/ipv6/ip6_fib.c:1578 > fib6_walk+0x91/0xf0 net/ipv6/ip6_fib.c:1623 > fib6_clean_tree+0x266/0x3c0 net/ipv6/ip6_fib.c:1695 > __fib6_clean_all+0x1f7/0x3b0 net/ipv6/ip6_fib.c:1711 > fib6_clean_all+0x27/0x30 net/ipv6/ip6_fib.c:1722 > rt6_ifdown+0xf7/0x910 net/ipv6/route.c:2820 > addrconf_ifdown+0x1a3/0x1aa0 net/ipv6/addrconf.c:3541 > addrconf_notify+0x1bb/0x2570 net/ipv6/addrconf.c:3466 > notifier_call_chain+0x145/0x2f0 kernel/notifier.c:93 > __raw_notifier_call_chain kernel/notifier.c:394 > raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 > call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1647 > call_netdevice_notifiers net/core/dev.c:1663 > __dev_notify_flags+0x1fd/0x320 net/core/dev.c:6499 > dev_change_flags+0xf5/0x140 net/core/dev.c:6530 > dev_ifsioc+0x62a/0x9f0 net/core/dev_ioctl.c:254 > dev_ioctl+0x249/0x1160 net/core/dev_ioctl.c:532 > sock_do_ioctl+0x94/0xb0 net/socket.c:913 > sock_ioctl+0x28f/0x440 net/socket.c:1004 > vfs_ioctl fs/ioctl.c:45 > do_vfs_ioctl+0x1bf/0x1780 fs/ioctl.c:685 > SYSC_ioctl fs/ioctl.c:700 > SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 > entry_SYSCALL_64_fastpath+0x1f/0xc2 arch/x86/entry/entry_64.S:204 > RIP: 0033:0x7f575ded4347 > RSP: 002b:00007fffc94d9948 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00007fffc94d9b30 RCX: 00007f575ded4347 > RDX: 00007fffc94d9980 RSI: 0000000000008914 RDI: 0000000000000006 > RBP: 00000000004004e0 R08: 0000000000000028 R09: 0101010101010101 > R10: 0000000000000000 R11: 0000000000000217 R12: 0000000000000000 > R13: 00007fffc94d9b30 R14: 0000000000000000 R15: 0000000000000000 > ---[ end trace 9bda4459ad907043 ]---
