general protection fault, probably for non-canonical address 0xdffffc0000000037: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001b8-0x00000000000001bf]
CPU: 1 PID: 4422 Comm: syz.0.16 Not tainted 6.1.144-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:htb_deactivate net/sched/sch_htb.c:610 [inline]
RIP: 0010:htb_qlen_notify+0x2d/0xb0 net/sched/sch_htb.c:1486
Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 f1 a5 38 f9 49 8d 9e b8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 48 8b 2b 31 ff 89 ee e8 2e a9 38 f9 85
RSP: 0018:ffffc900032d6e90 EFLAGS: 00010202
RAX: ffffffff8848319f RBX: 00000000000001b8 RCX: ffff888079391dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a750000
RBP: dffffc0000000000 R08: ffff888079391dc0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000037 R14: 0000000000000000 R15: ffff88807a750000
FS: 0000555590528500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 00000000281c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
qdisc_tree_reduce_backlog+0x287/0x470 net/sched/sch_api.c:807
codel_change+0x970/0xdb0 net/sched/sch_codel.c:177
codel_init+0x1d4/0x3a0 net/sched/sch_codel.c:196
qdisc_create+0x7cb/0x1090 net/sched/sch_api.c:1310
tc_modify_qdisc+0xb0f/0x1be0 net/sched/sch_api.c:-1
rtnetlink_rcv_msg+0x79b/0xed0 net/core/rtnetlink.c:6153
netlink_rcv_skb+0x1de/0x420 net/netlink/af_netlink.c:2493
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x74c/0x8c0 net/netlink/af_netlink.c:1337
netlink_sendmsg+0x89e/0xbc0 net/netlink/af_netlink.c:1859
sock_sendmsg_nosec net/socket.c:718 [inline]
__sock_sendmsg net/socket.c:730 [inline]
____sys_sendmsg+0x59b/0x970 net/socket.c:2519
___sys_sendmsg+0x21c/0x290 net/socket.c:2573
__sys_sendmsg net/socket.c:2602 [inline]
__do_sys_sendmsg net/socket.c:2611 [inline]
__se_sys_sendmsg+0x19e/0x270 net/socket.c:2609
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faef638e929
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:00007ffe795e3868 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007faef65b5fa0 RCX: 00007faef638e929
RDX: 000000000000c010 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007faef6410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007faef65b5fa0 R14: 00007faef65b5fa0 R15: 0000000000000003
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:htb_deactivate net/sched/sch_htb.c:610 [inline]
RIP: 0010:htb_qlen_notify+0x2d/0xb0 net/sched/sch_htb.c:1486
Code: 41 56 41 55 41 54 53 49 89 f6 49 89 ff 49 bc 00 00 00 00 00 fc ff df e8 f1 a5 38 f9 49 8d 9e b8 01 00 00 49 89 dd 49 c1 ed 03 <43> 0f b6 44 25 00 84 c0 75 48 8b 2b 31 ff 89 ee e8 2e a9 38 f9 85
RSP: 0018:ffffc900032d6e90 EFLAGS: 00010202
RAX: ffffffff8848319f RBX: 00000000000001b8 RCX: ffff888079391dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807a750000
RBP: dffffc0000000000 R08: ffff888079391dc0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000037 R14: 0000000000000000 R15: ffff88807a750000
FS: 0000555590528500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 00000000281c6000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 41 56 push %r14
2: 41 55 push %r13
4: 41 54 push %r12
6: 53 push %rbx
7: 49 89 f6 mov %rsi,%r14
a: 49 89 ff mov %rdi,%r15
d: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12
14: fc ff df
17: e8 f1 a5 38 f9 call 0xf938a60d
1c: 49 8d 9e b8 01 00 00 lea 0x1b8(%r14),%rbx
23: 49 89 dd mov %rbx,%r13
26: 49 c1 ed 03 shr $0x3,%r13
* 2a: 43 0f b6 44 25 00 movzbl 0x0(%r13,%r12,1),%eax <-- trapping instruction
30: 84 c0 test %al,%al
32: 75 48 jne 0x7c
34: 8b 2b mov (%rbx),%ebp
36: 31 ff xor %edi,%edi
38: 89 ee mov %ebp,%esi
3a: e8 2e a9 38 f9 call 0xf938a96d
3f: 85 .byte 0x85