BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 8a6f9067 P4D 8a6f9067 PUD a1836067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 15845 Comm: syz-executor.5 Not tainted 4.19.75 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff88804e20f4d8 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffff87e25620 RCX: ffffc90013848000
kobject: 'loop3' (00000000c72f5d10): kobject_uevent_env
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888085eb76c0
kobject: 'loop3' (00000000c72f5d10): fill_kobj_path: path = '/devices/virtual/block/loop3'
RBP: ffff88804e20f5d0 R08: ffff88805814a600 R09: ffff88804e20f658
R10: ffffed1009c41ed9 R11: ffff88804e20f6cf R12: ffff88804e20f5a8
R13: ffff888085eb76c0 R14: 0000000000000001 R15: ffffffff87e25620
FS:  00007f20cc8ba700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000008b7a8000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 tc_bind_tclass+0x13c/0x490 net/sched/sch_api.c:1834
 tc_ctl_tclass+0xaa9/0xc60 net/sched/sch_api.c:1968
kobject: 'loop3' (00000000c72f5d10): kobject_uevent_env
 rtnetlink_rcv_msg+0x463/0xb00 net/core/rtnetlink.c:4747
kobject: 'loop3' (00000000c72f5d10): fill_kobj_path: path = '/devices/virtual/block/loop3'
 netlink_rcv_skb+0x17d/0x460 net/netlink/af_netlink.c:2454
 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:4765
 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline]
 netlink_unicast+0x537/0x720 net/netlink/af_netlink.c:1343
 netlink_sendmsg+0x8ae/0xd70 net/netlink/af_netlink.c:1908
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd7/0x130 net/socket.c:632
 ___sys_sendmsg+0x803/0x920 net/socket.c:2115
kobject: 'loop3' (00000000c72f5d10): kobject_uevent_env
kobject: 'loop3' (00000000c72f5d10): fill_kobj_path: path = '/devices/virtual/block/loop3'
 __sys_sendmsg+0x105/0x1d0 net/socket.c:2153
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2160
 do_syscall_64+0xfd/0x620 arch/x86/entry/common.c:293
 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:00007f20cc8b9c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a29
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f20cc8ba6d4
R13: 00000000004c7967 R14: 00000000004dd348 R15: 00000000ffffffff
Modules linked in:
CR2: 0000000000000000
PM: Basic memory bitmaps freed
---[ end trace 218ac532d90c362f ]---
RIP: 0010:          (null)
Code: Bad RIP value.
RSP: 0018:ffff88804e20f4d8 EFLAGS: 00010246
kobject: 'loop4' (00000000488217c6): kobject_uevent_env
RAX: dffffc0000000000 RBX: ffffffff87e25620 RCX: ffffc90013848000
kobject: 'loop4' (00000000488217c6): fill_kobj_path: path = '/devices/virtual/block/loop4'
PM: Marking nosave pages: [mem 0x00000000-0x00000fff]
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888085eb76c0
PM: Marking nosave pages: [mem 0x0009f000-0x000fffff]
kobject: 'loop1' (000000008e98fe46): kobject_uevent_env
RBP: ffff88804e20f5d0 R08: ffff88805814a600 R09: ffff88804e20f658
PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff]
kobject: 'loop1' (000000008e98fe46): fill_kobj_path: path = '/devices/virtual/block/loop1'
R10: ffffed1009c41ed9 R11: ffff88804e20f6cf R12: ffff88804e20f5a8
PM: Basic memory bitmaps created
kobject: 'loop3' (00000000c72f5d10): kobject_uevent_env
kobject: 'loop3' (00000000c72f5d10): fill_kobj_path: path = '/devices/virtual/block/loop3'
R13: ffff888085eb76c0 R14: 0000000000000001 R15: ffffffff87e25620
Unrecognized hibernate image header format!
FS:  00007f20cc8ba700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000
kobject: 'loop3' (00000000c72f5d10): kobject_uevent_env
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000070f158 CR3: 000000008b7a8000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400