wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 0 P4D 0 
Oops: 0000 [#1] SMP PTI
CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 4.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:taprio_dequeue+0x9b/0x1e0 net/sched/sch_taprio.c:146
Code: f6 0f 84 29 01 00 00 41 8b 85 08 04 00 00 85 c0 0f 84 1a 01 00 00 8b 45 d4 45 31 f6 48 89 45 c8 48 8b 8b 80 02 00 00 49 63 c6 <4c> 8b 3c c1 4d 85 ff 0f 84 e8 00 00 00 49 8b 47 18 4c 89 ff 48 8b
RSP: 0018:ffffc90000c97d90 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88020e4df400 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000003 RDI: 0000000000000286
RBP: ffffc90000c97dc8 R08: 0000000000000002 R09: 0000000033000907
R10: 0000000000000000 R11: ffff8802346fccb0 R12: ffff88022087bc40
R13: ffff88022233d000 R14: 0000000000000000 R15: ffff88020e4df400
FS:  0000000000000000(0000) GS:ffff880237a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000003666000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dequeue_skb net/sched/sch_generic.c:277 [inline]
 qdisc_restart net/sched/sch_generic.c:380 [inline]
 __qdisc_run+0x82/0x570 net/sched/sch_generic.c:398
 qdisc_run include/net/pkt_sched.h:121 [inline]
 net_tx_action+0x183/0x2e0 net/core/dev.c:4554
 __do_softirq+0xfa/0x2e9 kernel/softirq.c:292
 run_ksoftirqd+0x3a/0x60 kernel/softirq.c:653
 smpboot_thread_fn+0xcf/0x170 kernel/smpboot.c:164
 kthread+0x11c/0x140 kernel/kthread.c:246
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:413
Modules linked in:
CR2: 0000000000000000
---[ end trace 11251bf816a9ec6e ]---
RIP: 0010:taprio_dequeue+0x9b/0x1e0 net/sched/sch_taprio.c:146
Code: f6 0f 84 29 01 00 00 41 8b 85 08 04 00 00 85 c0 0f 84 1a 01 00 00 8b 45 d4 45 31 f6 48 89 45 c8 48 8b 8b 80 02 00 00 49 63 c6 <4c> 8b 3c c1 4d 85 ff 0f 84 e8 00 00 00 49 8b 47 18 4c 89 ff 48 8b
RSP: 0018:ffffc90000c97d90 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff88020e4df400 RCX: 0000000000000000
RDX: 0000000000000003 RSI: 0000000000000003 RDI: 0000000000000286
RBP: ffffc90000c97dc8 R08: 0000000000000002 R09: 0000000033000907
R10: 0000000000000000 R11: ffff8802346fccb0 R12: ffff88022087bc40
R13: ffff88022233d000 R14: 0000000000000000 R15: ffff88020e4df400
FS:  0000000000000000(0000) GS:ffff880237a00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000003666000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f6 0f 84             	testb  $0x84,(%rdi)
   3:	29 01                	sub    %eax,(%rcx)
   5:	00 00                	add    %al,(%rax)
   7:	41 8b 85 08 04 00 00 	mov    0x408(%r13),%eax
   e:	85 c0                	test   %eax,%eax
  10:	0f 84 1a 01 00 00    	je     0x130
  16:	8b 45 d4             	mov    -0x2c(%rbp),%eax
  19:	45 31 f6             	xor    %r14d,%r14d
  1c:	48 89 45 c8          	mov    %rax,-0x38(%rbp)
  20:	48 8b 8b 80 02 00 00 	mov    0x280(%rbx),%rcx
  27:	49 63 c6             	movslq %r14d,%rax
* 2a:	4c 8b 3c c1          	mov    (%rcx,%rax,8),%r15 <-- trapping instruction
  2e:	4d 85 ff             	test   %r15,%r15
  31:	0f 84 e8 00 00 00    	je     0x11f
  37:	49 8b 47 18          	mov    0x18(%r15),%rax
  3b:	4c 89 ff             	mov    %r15,%rdi
  3e:	48                   	rex.W
  3f:	8b                   	.byte 0x8b