BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 99033067 P4D 99033067 PUD 9bd1f067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 21072 Comm: syz-executor.5 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff88808d1174d8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffffff884a7c20 RCX: ffffc900109ce000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888060144500 RBP: ffff88808d1175d0 R08: ffff88805f5a0080 R09: ffff88808d117658 R10: ffffed1011a22ed9 R11: ffff88808d1176cf R12: ffff888060144500 R13: 0000000000000001 R14: ffff88808d1175a8 R15: ffffffff884a7c20 FS: 00007ff3322d3700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000006607c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tc_bind_tclass+0x13e/0x2f0 net/sched/sch_api.c:1923 tc_ctl_tclass+0xadb/0xcd0 net/sched/sch_api.c:2059 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:5223 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5241 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x531/0x710 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x8a5/0xd60 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:637 [inline] sock_sendmsg+0xd7/0x130 net/socket.c:657 ___sys_sendmsg+0x803/0x920 net/socket.c:2311 __sys_sendmsg+0x105/0x1d0 net/socket.c:2356 __do_sys_sendmsg net/socket.c:2365 [inline] __se_sys_sendmsg net/socket.c:2363 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2363 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4598e9 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:00007ff3322d2c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000004598e9 RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff3322d36d4 R13: 00000000004c77fb R14: 00000000004dd098 R15: 00000000ffffffff Modules linked in: CR2: 0000000000000000 ---[ end trace 60ed8fbd3c4d02ed ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffff88808d1174d8 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffffff884a7c20 RCX: ffffc900109ce000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888060144500 RBP: ffff88808d1175d0 R08: ffff88805f5a0080 R09: ffff88808d117658 R10: ffffed1011a22ed9 R11: ffff88808d1176cf R12: ffff888060144500 R13: 0000000000000001 R14: ffff88808d1175a8 R15: ffffffff884a7c20 FS: 00007ff3322d3700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000046ef00 CR3: 000000006607c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400