Oops: general protection fault, probably for non-canonical address 0xdffffc0000000035: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x00000000000001a8-0x00000000000001af]
CPU: 1 UID: 0 PID: 8281 Comm: syz.7.511 Not tainted 6.16.0-rc4-syzkaller-00123-g4c06e63b9203 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline]
RIP: 0010:htb_qlen_notify+0x2d/0xc0 net/sched/sch_htb.c:1489
Code: fa 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d ab a8 01 00 00 e8 d4 a1 30 f8 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 67 44 8b a3 a8 01 00 00 31 ff 44
RSP: 0018:ffffc90003037320 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90020c01000
RDX: 0000000000000035 RSI: ffffffff898b7e1c RDI: ffff888051bae000
RBP: ffff888051bae000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000000affe0 R11: 0000000000000001 R12: ffffffff8ce86e00
R13: 00000000000001a8 R14: ffffffff8ce86de0 R15: ffff888051bae000
FS:  00007f82a7bd56c0(0000) GS:ffff88812481c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe03ce4f88 CR3: 00000000332c3000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x224/0x500 net/sched/sch_api.c:811
 codel_change+0x6d9/0xc90 net/sched/sch_codel.c:153
 codel_init+0x2e6/0x430 net/sched/sch_codel.c:172
 qdisc_create+0x457/0xfc0 net/sched/sch_api.c:1324
 __tc_modify_qdisc net/sched/sch_api.c:1749 [inline]
 tc_modify_qdisc+0x12bb/0x2130 net/sched/sch_api.c:1813
 rtnetlink_rcv_msg+0x3c9/0xe90 net/core/rtnetlink.c:6953
 netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
 netlink_unicast+0x53d/0x7f0 net/netlink/af_netlink.c:1339
 netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:712 [inline]
 __sock_sendmsg net/socket.c:727 [inline]
 ____sys_sendmsg+0xa98/0xc70 net/socket.c:2566
 ___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
 __sys_sendmsg+0x16d/0x220 net/socket.c:2652
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82a9d8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f82a7bd5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f82a9fb6080 RCX: 00007f82a9d8e929
RDX: 000000000000c010 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007f82a9e10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f82a9fb6080 R15: 00007fff34a03ab8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:htb_deactivate net/sched/sch_htb.c:613 [inline]
RIP: 0010:htb_qlen_notify+0x2d/0xc0 net/sched/sch_htb.c:1489
Code: fa 41 55 41 54 55 48 89 fd 53 48 89 f3 4c 8d ab a8 01 00 00 e8 d4 a1 30 f8 4c 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 04 3c 03 7e 67 44 8b a3 a8 01 00 00 31 ff 44
RSP: 0018:ffffc90003037320 EFLAGS: 00010216
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90020c01000
RDX: 0000000000000035 RSI: ffffffff898b7e1c RDI: ffff888051bae000
RBP: ffff888051bae000 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000000affe0 R11: 0000000000000001 R12: ffffffff8ce86e00
R13: 00000000000001a8 R14: ffffffff8ce86de0 R15: ffff888051bae000
FS:  00007f82a7bd56c0(0000) GS:ffff88812481c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe03ce4f88 CR3: 00000000332c3000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	fa                   	cli
   1:	41 55                	push   %r13
   3:	41 54                	push   %r12
   5:	55                   	push   %rbp
   6:	48 89 fd             	mov    %rdi,%rbp
   9:	53                   	push   %rbx
   a:	48 89 f3             	mov    %rsi,%rbx
   d:	4c 8d ab a8 01 00 00 	lea    0x1a8(%rbx),%r13
  14:	e8 d4 a1 30 f8       	call   0xf830a1ed
  19:	4c 89 ea             	mov    %r13,%rdx
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 04                	je     0x36
  32:	3c 03                	cmp    $0x3,%al
  34:	7e 67                	jle    0x9d
  36:	44 8b a3 a8 01 00 00 	mov    0x1a8(%rbx),%r12d
  3d:	31 ff                	xor    %edi,%edi
  3f:	44                   	rex.R