Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 1037 Comm: kworker/u4:7 Not tainted 6.14.0-rc4-syzkaller-00282-g1973160c90d7 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ipv6_addrconf addrconf_dad_work
RIP: 0010:netdev_core_pick_tx+0xe5/0x320 net/core/dev.c:4524
Code: 00 00 49 8d 5d 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a9 83 5e f8 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 8c 83 5e f8 48 89 2c 24 48 8b 1b
RSP: 0018:ffffc900025bec78 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888035cba440
RDX: ffff888035cba440 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888044416028 R08: ffffffff89ca769c R09: 1ffffffff28a9318
R10: dffffc0000000000 R11: fffffbfff28a9319 R12: dffffc0000000000
R13: ffff888044416000 R14: ffff888033d34c80 R15: 1ffff11008882c05
FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffce1fd0f8 CR3: 00000000444e2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__dev_queue_xmit+0x8d9/0x3f50 net/core/dev.c:4609
dev_queue_xmit include/linux/netdevice.h:3313 [inline]
vlan_dev_hard_start_xmit+0x36c/0x5f0 net/8021q/vlan_dev.c:125
__netdev_start_xmit include/linux/netdevice.h:5151 [inline]
netdev_start_xmit include/linux/netdevice.h:5160 [inline]
xmit_one net/core/dev.c:3800 [inline]
dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3816
__dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4649
neigh_output include/net/neighbour.h:539 [inline]
ip6_finish_output2+0x12bc/0x17c0 net/ipv6/ip6_output.c:141
ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226
NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314
mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1868
ipv6_mc_dad_complete+0x88/0x490 net/ipv6/mcast.c:2293
addrconf_dad_completed+0x712/0xcd0 net/ipv6/addrconf.c:4336
addrconf_dad_work+0xdbc/0x16a0
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:netdev_core_pick_tx+0xe5/0x320 net/core/dev.c:4524
Code: 00 00 49 8d 5d 08 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a9 83 5e f8 48 8b 1b 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 8c 83 5e f8 48 89 2c 24 48 8b 1b
RSP: 0018:ffffc900025bec78 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff888035cba440
RDX: ffff888035cba440 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888044416028 R08: ffffffff89ca769c R09: 1ffffffff28a9318
R10: dffffc0000000000 R11: fffffbfff28a9319 R12: dffffc0000000000
R13: ffff888044416000 R14: ffff888033d34c80 R15: 1ffff11008882c05
FS: 0000000000000000(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffce1fd0f8 CR3: 00000000444e2000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 49 8d 5d 08 lea 0x8(%r13),%rbx
6: 48 89 d8 mov %rbx,%rax
9: 48 c1 e8 03 shr $0x3,%rax
d: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
12: 74 08 je 0x1c
14: 48 89 df mov %rbx,%rdi
17: e8 a9 83 5e f8 call 0xf85e83c5
1c: 48 8b 1b mov (%rbx),%rbx
1f: 48 83 c3 30 add $0x30,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 8c 83 5e f8 call 0xf85e83c5
39: 48 89 2c 24 mov %rbp,(%rsp)
3d: 48 8b 1b mov (%rbx),%rbx