IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
audit: type=1326 audit(1668000125.160:7): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=6523 comm="syz-executor.1" exe="/syz-executor.1" sig=9 arch=c000003e syscall=231 compat=0 ip=0x7fa894c70b19 code=0x0
BUG: unable to handle page fault for address: fffffbc4bdd57e06
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 6dfd0067 P4D 6dfd0067 PUD 6d1fc067 PMD 6d1fb067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 1 PID: 6527 Comm: syz-executor.1 Not tainted 6.1.0-rc4-next-20221109 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:get_desc+0x128/0x460
Code: e2 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 cd 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de
RSP: 0000:ffff888042107bf8 EFLAGS: 00010216
RAX: 1fffffc4bdd57e06 RBX: fffffe25eeabf030 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: ffff888042107cb8 R08: 0000000000000006 R09: 000000000000007f
R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff11008420f7f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f
FS:  00007fa8921c5700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbc4bdd57e06 CR3: 00000000315da000 CR4: 0000000000350ee4
Call Trace:
 <TASK>
 insn_get_code_seg_params+0xab/0x1b0
 insn_decode_from_regs+0x72/0x190
 fixup_umip_exception+0xcb/0x6d0
 exc_general_protection+0x161/0x220
 asm_exc_general_protection+0x26/0x30
RIP: 0033:0x7ffd939e9946
Code: 83 08 00 00 0f 84 b5 00 00 00 4c 63 d7 49 c1 e2 04 4d 01 ca 45 8b 19 41 f6 c3 01 0f 85 8d 00 00 00 41 8b 41 04 83 f8 01 75 6f <0f> 01 f9 66 90 48 c1 e2 20 48 09 c2 48 85 d2 78 63 49 8b 49 08 49
RSP: 002b:00007fa8921c5150 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000002 RSI: 00007fa8921c51f0 RDI: 0000000000000001
RBP: 00007fa8921c5170 R08: 0000000000000000 R09: 00007ffd939e5080
R10: 00007ffd939e5090 R11: 000000000005a1f8 R12: 00007fa8921c51f0
R13: 00007ffd939e32cf R14: 00007fa8921c5300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: fffffbc4bdd57e06
---[ end trace 0000000000000000 ]---
RIP: 0010:get_desc+0x128/0x460
Code: e2 02 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 cd 02 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 d8 48 c1 e8 03 <0f> b6 0c 10 48 8d 43 07 48 89 c6 48 c1 ee 03 0f b6 14 16 48 89 de
RSP: 0000:ffff888042107bf8 EFLAGS: 00010216
RAX: 1fffffc4bdd57e06 RBX: fffffe25eeabf030 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: ffff888042107cb8 R08: 0000000000000006 R09: 000000000000007f
R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff11008420f7f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f
FS:  00007fa8921c5700(0000) GS:ffff88806d100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbc4bdd57e06 CR3: 00000000315da000 CR4: 0000000000350ee4
ieee80211 phy17: Selected rate control algorithm 'minstrel_ht'
wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
ieee80211 phy18: Selected rate control algorithm 'minstrel_ht'
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
----------------
Code disassembly (best guess):
   0:	e2 02                	loop   0x4
   2:	00 00                	add    %al,(%rax)
   4:	83 e0 07             	and    $0x7,%eax
   7:	38 c2                	cmp    %al,%dl
   9:	0f 9e c1             	setle  %cl
   c:	84 d2                	test   %dl,%dl
   e:	0f 95 c0             	setne  %al
  11:	84 c1                	test   %al,%cl
  13:	0f 85 cd 02 00 00    	jne    0x2e6
  19:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
  20:	fc ff df
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 0c 10          	movzbl (%rax,%rdx,1),%ecx <-- trapping instruction
  2e:	48 8d 43 07          	lea    0x7(%rbx),%rax
  32:	48 89 c6             	mov    %rax,%rsi
  35:	48 c1 ee 03          	shr    $0x3,%rsi
  39:	0f b6 14 16          	movzbl (%rsi,%rdx,1),%edx
  3d:	48 89 de             	mov    %rbx,%rsi