netlink: 4 bytes leftover after parsing attributes in process `syz.0.16'.
Unable to handle kernel paging request at virtual address dfff800000000036
Mem abort info:
ESR = 0x0000000096000006
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x06: level 2 translation fault
Data abort info:
ISV = 0, ISS = 0x00000006
CM = 0, WnR = 0
[dfff800000000036] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4264 Comm: syz.0.16 Not tainted 5.15.187-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : htb_deactivate net/sched/sch_htb.c:609 [inline]
pc : htb_qlen_notify+0x3c/0xc8 net/sched/sch_htb.c:1507
lr : htb_qlen_notify+0x2c/0xc8 net/sched/sch_htb.c:1504
sp : ffff80001fd86da0
x29: ffff80001fd86da0 x28: 1ffff000025a8aa8 x27: dfff800000000000
x26: 0000000000000000 x25: ffff800012d45548 x24: 0000000000000036
x23: dfff800000000000 x22: ffff8000162edce0 x21: ffff0000c0a9e000
x20: 0000000000000000 x19: 00000000000001b0 x18: 0000000000000201
x17: 0000000000000000 x16: ffff8000082bf708 x15: 00000000ffffffff
x14: 0000000000ff0100 x13: ffffffffffffffff x12: 0000000000ff0100
x11: 0000000000000201 x10: 0000000000000000 x9 : 0000000000000003
x8 : ffff0000d9571b40 x7 : ffff80000f8d3b08 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff0000c0a9e000
Call trace:
htb_deactivate net/sched/sch_htb.c:609 [inline]
htb_qlen_notify+0x3c/0xc8 net/sched/sch_htb.c:1507
qdisc_tree_reduce_backlog+0x250/0x410 net/sched/sch_api.c:799
sfq_change net/sched/sch_sfq.c:737 [inline]
sfq_init+0x1338/0x1da4 net/sched/sch_sfq.c:801
qdisc_create+0x6e4/0xf24 net/sched/sch_api.c:1260
tc_modify_qdisc+0x8bc/0x1308 net/sched/sch_api.c:-1
rtnetlink_rcv_msg+0x9d4/0xd04 net/core/rtnetlink.c:5650
netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2489
rtnetlink_rcv+0x28/0x38 net/core/rtnetlink.c:5668
netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
netlink_unicast+0x60c/0x89c net/netlink/af_netlink.c:1337
netlink_sendmsg+0x6e8/0x9cc net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:704 [inline]
__sock_sendmsg net/socket.c:716 [inline]
____sys_sendmsg+0x61c/0x920 net/socket.c:2436
___sys_sendmsg+0x1d0/0x240 net/socket.c:2490
__sys_sendmsg net/socket.c:2519 [inline]
__do_sys_sendmsg net/socket.c:2528 [inline]
__se_sys_sendmsg net/socket.c:2526 [inline]
__arm64_sys_sendmsg+0x1a8/0x254 net/socket.c:2526
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 9106c293 d343fe78 12000a69 11000d29 (38f76b08)
---[ end trace 33b67244898786be ]---
----------------
Code disassembly (best guess):
0: 9106c293 add x19, x20, #0x1b0
4: d343fe78 lsr x24, x19, #3
8: 12000a69 and w9, w19, #0x7
c: 11000d29 add w9, w9, #0x3
* 10: 38f76b08 ldrsb w8, [x24, x23] <-- trapping instruction