syzbot

kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 18349 Comm: syz-executor.0 Not tainted 5.3.0+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:tcf_action_destroy+0x34/0x220 net/sched/act_api.c:705
Code: 41 54 53 50 41 89 f7 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 2d 7c 83 fb 31 ff 44 89 fe e8 c3 7f 83 fb 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 3e ae bc fb 49 8b 1e 48 85 db 0f 84
RSP: 0018:ffff88804bee72e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000002
RDX: ffffc90005f55000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88804bee7310 R08: ffffffff85efa30d R09: ffffed1015d66a75
R10: ffffed1015d66a75 R11: 0000000000000000 R12: ffff88804bee7490
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  00007fa72a5fc700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c420db3200 CR3: 000000008b5f5000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tcf_exts_destroy+0x45/0xa0 net/sched/cls_api.c:2897
 tcindex_set_parms net/sched/cls_tcindex.c:488 [inline]
 tcindex_change+0x119c/0x2680 net/sched/cls_tcindex.c:519
 tc_new_tfilter+0x151c/0x27b0 net/sched/cls_api.c:2019
 rtnetlink_rcv_msg+0x8fb/0xd40 net/core/rtnetlink.c:5214
 netlink_rcv_skb+0x19e/0x3d0 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5241
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x787/0x8f0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x993/0xc50 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 ___sys_sendmsg+0x60d/0x910 net/socket.c:2311
 __sys_sendmmsg+0x239/0x470 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg net/socket.c:2439 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2439
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459a29
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fa72a5fbc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fa72a5fbc90 RCX: 0000000000459a29
RDX: 0000000004924b68 RSI: 0000000020000140 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa72a5fc6d4
R13: 00000000004c721c R14: 00000000004dca30 R15: 0000000000000005
Modules linked in:
---[ end trace 4147169cd11b58b2 ]---
RIP: 0010:tcf_action_destroy+0x34/0x220 net/sched/act_api.c:705
Code: 41 54 53 50 41 89 f7 49 89 fe 48 bb 00 00 00 00 00 fc ff df e8 2d 7c 83 fb 31 ff 44 89 fe e8 c3 7f 83 fb 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 3e ae bc fb 49 8b 1e 48 85 db 0f 84
RSP: 0018:ffff88804bee72e0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000002
RDX: ffffc90005f55000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88804bee7310 R08: ffffffff85efa30d R09: ffffed1015d66a75
R10: ffffed1015d66a75 R11: 0000000000000000 R12: ffff88804bee7490
R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000001
FS:  00007fa72a5fc700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f316fa65000 CR3: 000000008b5f5000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400