WARNING: ODEBUG bug in route4_destroy

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: e23d55af0e1f Linux 4.19.205
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15cebe15300000
kernel config: https://syzkaller.appspot.com/x/.config?x=2221dd564152b412
dashboard link: https://syzkaller.appspot.com/bug?extid=296cd30a128e50858566
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b01313300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11f69333300000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+296cd3...@syzkaller.appspotmail.com

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ODEBUG: activate active (active state 1) object type: rcu_head hint: (null)
WARNING: CPU: 1 PID: 8430 at lib/debugobjects.c:325 debug_print_object+0x160/0x250 lib/debugobjects.c:325
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8430 Comm: syz-executor494 Not tainted 4.19.205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
panic+0x26a/0x50e kernel/panic.c:186
__warn.cold+0x20/0x5a kernel/panic.c:541
report_bug+0x262/0x2b0 lib/bug.c:183
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:debug_print_object+0x160/0x250 lib/debugobjects.c:325
Code: dd a0 f0 b3 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bf 00 00 00 48 8b 14 dd a0 f0 b3 88 48 c7 c7 c0 e4 b3 88 e8 c0 5e 7b 04 <0f> 0b 83 05 83 e1 af 07 01 48 83 c4 20 5b 5d 41 5c 41 5d c3 48 89
RSP: 0018:ffff8880aefb7058 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814e0d61 RDI: ffffed1015df6dfd
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: ffffffff8c66405b R12: ffffffff89f85ec0
R13: 0000000000000000 R14: 1ffff11015df6e16 R15: ffffffff89f85ec0
debug_object_activate+0x2f1/0x450 lib/debugobjects.c:484
debug_rcu_head_queue kernel/rcu/rcu.h:193 [inline]
__call_rcu.constprop.0+0x31/0x7f0 kernel/rcu/tree.c:2977
queue_rcu_work+0x75/0x90 kernel/workqueue.c:1634
route4_queue_work net/sched/cls_route.c:276 [inline]
route4_destroy+0x4b2/0x7e0 net/sched/cls_route.c:302
tcf_proto_destroy net/sched/cls_api.c:190 [inline]
tcf_chain_flush+0x219/0x3e0 net/sched/cls_api.c:362
tcf_block_put_ext.part.0+0x404/0x6e0 net/sched/cls_api.c:770
tcf_block_put_ext net/sched/cls_api.c:754 [inline]
tcf_block_put+0xad/0x100 net/sched/cls_api.c:797
drr_destroy_qdisc+0x44/0x1d0 net/sched/sch_drr.c:464
qdisc_destroy+0x180/0x790 net/sched/sch_generic.c:983
notify_and_destroy net/sched/sch_api.c:925 [inline]
qdisc_graft+0xb61/0x1130 net/sched/sch_api.c:983
tc_modify_qdisc+0xd3d/0x1a80 net/sched/sch_api.c:1583
rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2457
netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1346
netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1911
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0xc3/0x120 net/socket.c:661
___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2225
__sys_sendmsg net/socket.c:2263 [inline]
__do_sys_sendmsg net/socket.c:2272 [inline]
__se_sys_sendmsg net/socket.c:2270 [inline]
__x64_sys_sendmsg+0x132/0x220 net/socket.c:2270
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x445ef9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f286c57c308 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004cb468 RCX: 0000000000445ef9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00000000004cb460 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 00000000004cb46c
R13: 000000000049b074 R14: 6d32cc5e8ead0600 R15: 0000000000022000
Shutting down cpus with NMI
Kernel Offset: disabled
Rebooting in 86400 seconds..


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