R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd06370a6d4 R13: 00000000004c742e R14: 00000000004dcfe8 R15: 0000000000000007 BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 76472067 P4D 76472067 PUD 7a761067 PMD 0 Oops: 0000 [#1] PREEMPT SMP CPU: 0 PID: 30625 Comm: syz-executor.4 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+0x71/0x120 net/sched/act_api.c:705 Code: c6 01 bf 20 00 00 00 48 83 c3 08 44 89 f6 e8 96 90 85 fd 41 83 fe 20 0f 84 92 00 00 00 e8 07 8f 85 fd 48 89 df e8 df 6b 92 fd <4c> 8b 2b 4d 85 ed 74 7d e8 f2 8e 85 fd 48 89 df e8 fa 6b 92 fd 4c RSP: 0018:ffffc90010e6b6b0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 RBP: ffffc90010e6b6e0 R08: ffff8880a471e080 R09: 0000000000000000 R10: ffffc90010e6b840 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888076479200 R14: 0000000000000000 R15: 0000000000000001 FS: 00007fd06370a700(0000) GS:ffff88812be00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000079745000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcf_exts_destroy+0x32/0x60 net/sched/cls_api.c:3030 u32_change+0x14e1/0x1855 net/sched/cls_u32.c:1102 tc_new_tfilter+0x778/0x1430 net/sched/cls_api.c:2152 rtnetlink_rcv_msg+0x431/0x500 net/core/rtnetlink.c:5214 netlink_rcv_skb+0xb0/0x260 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x26/0x30 net/core/rtnetlink.c:5241 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x354/0x430 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x456/0x770 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:657 ___sys_sendmsg+0x2b7/0x5d0 net/socket.c:2311 __sys_sendmmsg+0x123/0x350 net/socket.c:2413 __do_sys_sendmmsg net/socket.c:2442 [inline] __se_sys_sendmmsg net/socket.c:2439 [inline] __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2439 do_syscall_64+0xcf/0x2f0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 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:00007fd063709c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fd063709c90 RCX: 0000000000459a29 RDX: 0000000000000332 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fd06370a6d4 R13: 00000000004c742e R14: 00000000004dcfe8 R15: 0000000000000007 Modules linked in: CR2: 0000000000000000 ---[ end trace b2bb3ca152daab8e ]--- RIP: 0010:tcf_action_destroy+0x71/0x120 net/sched/act_api.c:705 Code: c6 01 bf 20 00 00 00 48 83 c3 08 44 89 f6 e8 96 90 85 fd 41 83 fe 20 0f 84 92 00 00 00 e8 07 8f 85 fd 48 89 df e8 df 6b 92 fd <4c> 8b 2b 4d 85 ed 74 7d e8 f2 8e 85 fd 48 89 df e8 fa 6b 92 fd 4c RSP: 0018:ffffc90010e6b6b0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 RBP: ffffc90010e6b6e0 R08: ffff8880a471e080 R09: 0000000000000000 R10: ffffc90010e6b840 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888076479200 R14: 0000000000000000 R15: 0000000000000001 FS: 00007fd06370a700(0000) GS:ffff88812be00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b33a24000 CR3: 0000000079745000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400