WARNING: CPU: 0 PID: 8399 at lib/refcount.c:28 refcount_warn_saturate+0x12b/0x140 lib/refcount.c:28
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8399 Comm: syz-executor.2 Not tainted 5.8.0-rc2-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+0x12f/0x192 lib/dump_stack.c:118
 panic+0x22a/0x4e3 kernel/panic.c:231
 __warn.cold.12+0x25/0x31 kernel/panic.c:600
 report_bug+0x1b2/0x260 lib/bug.c:198
 exc_invalid_op+0x1b6/0x370 arch/x86/kernel/traps.c:235
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:563
RIP: 0010:refcount_warn_saturate+0x12b/0x140 lib/refcount.c:28
Code: 3e ed fd 0f 0b e9 53 ff ff ff 48 89 df e8 fd d1 4d fe e9 23 ff ff ff 48 c7 c7 00 6c cf 87 c6 05 b7 4d 6d 06 01 e8 9a 3e ed fd <0f> 0b e9 2c ff ff ff 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 41
RSP: 0018:ffffc90004f074a0 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88809fc2b864 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff87cfa400 RDI: ffffffff8b99d1a0
RBP: 0000000000000003 R08: ffffed1015d06315 R09: ffffed1015d06315
R10: ffff8880ae8318a7 R11: ffffed1015d06314 R12: ffff8880869c8000
R13: ffff88809db2f000 R14: 00000000ffffffea R15: ffff88809db2f03c
 qdisc_create+0xb2b/0x1070 net/sched/sch_api.c:1294
 tc_modify_qdisc+0x3ba/0x1720 net/sched/sch_api.c:1661
 rtnetlink_rcv_msg+0x346/0x8c0 net/core/rtnetlink.c:5460
 netlink_rcv_skb+0x117/0x370 net/netlink/af_netlink.c:2469
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x434/0x630 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x714/0xc60 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xac/0xe0 net/socket.c:672
 ____sys_sendmsg+0x57b/0x790 net/socket.c:2352
 ___sys_sendmsg+0xe4/0x160 net/socket.c:2406
 __sys_sendmsg+0xce/0x170 net/socket.c:2439
 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d579
Code: Bad RIP value.
RSP: 002b:00007f682ac68c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002cd80 RCX: 000000000045d579
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 000000000118d020 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cfec
R13: 00007fff6f7f040f R14: 00007f682ac699c0 R15: 000000000118cfec
Kernel Offset: disabled