Oops: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
CPU: 0 UID: 0 PID: 5937 Comm: syz-executor614 Not tainted 6.15.0-rc5-syzkaller-00022-g01f95500a162 #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
RIP: 0010:qdisc_pkt_len include/net/sch_generic.h:821 [inline]
RIP: 0010:codel_change+0x4cb/0x930 net/sched/sch_codel.c:149
Code: e8 fa 5c 54 f8 49 89 dc 43 80 7c 25 00 00 74 08 4c 89 ff e8 c7 2c b4 f8 49 c7 07 00 00 00 00 4d 8d 6f 28 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 dc 00 00 00 45 8b 6d 00 48 8b 84 24 90
RSP: 0018:ffffc90004357200 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff88806f5e90d8 RCX: ffff88802ecebc00
RDX: 0000000000000000 RSI: ffff888028e16000 RDI: ffff888028e16000
RBP: ffffc90004357370 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200086ae30 R12: dffffc0000000000
R13: 0000000000000028 R14: 000000000000007a R15: 0000000000000000
FS: 000055559154d480(0000) GS:ffff8881260fd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd80deee58 CR3: 000000007e398000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
qdisc_change net/sched/sch_api.c:1394 [inline]
__tc_modify_qdisc net/sched/sch_api.c:1727 [inline]
tc_modify_qdisc+0x1897/0x20b0 net/sched/sch_api.c:1821
rtnetlink_rcv_msg+0x779/0xb70 net/core/rtnetlink.c:6964
netlink_rcv_skb+0x219/0x490 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x758/0x8d0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg+0x219/0x270 net/socket.c:727
____sys_sendmsg+0x505/0x830 net/socket.c:2566
___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620
__sys_sendmsg net/socket.c:2652 [inline]
__do_sys_sendmsg net/socket.c:2657 [inline]
__se_sys_sendmsg net/socket.c:2655 [inline]
__x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb5048f7b19
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 01 1a 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffff2671a78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fb5048f7b19
RDX: 0000000004040840 RSI: 0000200000000280 RDI: 0000000000000007
RBP: 00007ffff2671ae0 R08: 00007ffff2671ae0 R09: 00000000000f4240
R10: 00007ffff2671a80 R11: 0000000000000246 R12: 00000000000f4240
R13: 00000000000181ac R14: 00007ffff2671aac R15: 00007ffff2671ac0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qdisc_pkt_len include/net/sch_generic.h:821 [inline]
RIP: 0010:codel_change+0x4cb/0x930 net/sched/sch_codel.c:149
Code: e8 fa 5c 54 f8 49 89 dc 43 80 7c 25 00 00 74 08 4c 89 ff e8 c7 2c b4 f8 49 c7 07 00 00 00 00 4d 8d 6f 28 4c 89 e8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 dc 00 00 00 45 8b 6d 00 48 8b 84 24 90
RSP: 0018:ffffc90004357200 EFLAGS: 00010206
RAX: 0000000000000005 RBX: ffff88806f5e90d8 RCX: ffff88802ecebc00
RDX: 0000000000000000 RSI: ffff888028e16000 RDI: ffff888028e16000
RBP: ffffc90004357370 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200086ae30 R12: dffffc0000000000
R13: 0000000000000028 R14: 000000000000007a R15: 0000000000000000
FS: 000055559154d480(0000) GS:ffff8881260fd000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd80deee58 CR3: 000000007e398000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: e8 fa 5c 54 f8 call 0xf8545cff
5: 49 89 dc mov %rbx,%r12
8: 43 80 7c 25 00 00 cmpb $0x0,0x0(%r13,%r12,1)
e: 74 08 je 0x18
10: 4c 89 ff mov %r15,%rdi
13: e8 c7 2c b4 f8 call 0xf8b42cdf
18: 49 c7 07 00 00 00 00 movq $0x0,(%r15)
1f: 4d 8d 6f 28 lea 0x28(%r15),%r13
23: 4c 89 e8 mov %r13,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 dc 00 00 00 jne 0x113
37: 45 8b 6d 00 mov 0x0(%r13),%r13d
3b: 48 rex.W
3c: 8b .byte 0x8b
3d: 84 24 90 test %ah,(%rax,%rdx,4)