tipc: Enabling of bearer <eth:syzkaller0> rejected, already enabled
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
CPU: 2 UID: 0 PID: 17711 Comm: syz.2.4323 Not tainted 6.16.0-rc5-syzkaller-00025-gd006330be3f7 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:qdisc_tree_reduce_backlog+0x1cb/0x500 net/sched/sch_api.c:806
Code: 4d 8b 67 18 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 ff 02 00 00 4d 8b 74 24 08 4d 8d 66 20 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 0f 85 1a 03 00 00 49 83 7e 20 00 74 48 e8 cf 04 3a f8
RSP: 0018:ffffc9000748f2b0 EFLAGS: 00010202
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: ffffc9000cb52000
RDX: 0000000000080000 RSI: ffffffff89815dec RDI: ffffffff90aa39a8
RBP: 00000000000b0002 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000020
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888058f41000
FS:  0000000000000000(0000) GS:ffff888097721000(0063) knlGS:00000000f50beb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f50bd528 CR3: 000000004d094000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 fq_change+0xc60/0x1d30 net/sched/sch_fq.c:1147
 fq_init+0x696/0x840 net/sched/sch_fq.c:1201
 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+0x3c6/0xe90 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+0x53a/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_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf70ce579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f50be55c EFLAGS: 00000296 ORIG_RAX: 0000000000000172
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000080000200
RDX: 0000000004008000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qdisc_tree_reduce_backlog+0x1cb/0x500 net/sched/sch_api.c:806
Code: 4d 8b 67 18 49 8d 7c 24 08 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 ff 02 00 00 4d 8b 74 24 08 4d 8d 66 20 4c 89 e0 48 c1 e8 03 <80> 3c 18 00 0f 85 1a 03 00 00 49 83 7e 20 00 74 48 e8 cf 04 3a f8
RSP: 0018:ffffc9000748f2b0 EFLAGS: 00010202
RAX: 0000000000000004 RBX: dffffc0000000000 RCX: ffffc9000cb52000
RDX: 0000000000080000 RSI: ffffffff89815dec RDI: ffffffff90aa39a8
RBP: 00000000000b0002 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000020
R13: 0000000000000000 R14: 0000000000000000 R15: ffff888058f41000
FS:  0000000000000000(0000) GS:ffff888097721000(0063) knlGS:00000000f50beb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f50bd528 CR3: 000000004d094000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	4d 8b 67 18          	mov    0x18(%r15),%r12
   4:	49 8d 7c 24 08       	lea    0x8(%r12),%rdi
   9:	48 89 f8             	mov    %rdi,%rax
   c:	48 c1 e8 03          	shr    $0x3,%rax
  10:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  14:	0f 85 ff 02 00 00    	jne    0x319
  1a:	4d 8b 74 24 08       	mov    0x8(%r12),%r14
  1f:	4d 8d 66 20          	lea    0x20(%r14),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	0f 85 1a 03 00 00    	jne    0x34e
  34:	49 83 7e 20 00       	cmpq   $0x0,0x20(%r14)
  39:	74 48                	je     0x83
  3b:	e8 cf 04 3a f8       	call   0xf83a050f