BUG: unable to handle page fault for address: fffffbc0c139ee06
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 6dfd0067 P4D 6dfd0067 PUD 6de04067 PMD 6de03067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 17987 Comm: syz-executor.2 Not tainted 6.1.0-rc4-next-20221111 #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:ffff88803c5e7bf8 EFLAGS: 00010216
RAX: 1fffffc0c139ee06 RBX: fffffe0609cf7030 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: ffff88803c5e7cb8 R08: 0000000000000006 R09: 000000000000007f
R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff110078bcf7f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f
FS:  00007faa113b9700(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbc0c139ee06 CR3: 0000000038efa000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000600
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: 0033:0x7faa13de2abd
Code: 8b 81 0c 01 00 00 44 8b 89 08 01 00 00 48 8b 54 24 d8 c1 e0 04 8d b8 7f 01 00 00 83 e7 c0 45 85 c9 74 07 89 d0 31 d2 41 f7 f1 <f3> 41 0f 6f 00 89 d0 c1 e0 06 48 01 c6 0f 11 06 f3 41 0f 6f 48 10
RSP: 002b:00007faa113b9178 EFLAGS: 00010212
RAX: 0000000000000000 RBX: 00007faa13f56f60 RCX: 0000000020ffc000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000020140
RBP: 00007faa13e9df6d R08: 9999999999999999 R09: 0000000000001000
R10: 0000000000000000 R11: 00000000000b9680 R12: 0000000000000000
R13: 00007ffe99b8668f R14: 00007faa113b9300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: fffffbc0c139ee06
---[ 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:ffff88803c5e7bf8 EFLAGS: 00010216
RAX: 1fffffc0c139ee06 RBX: fffffe0609cf7030 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: ffff88803c5e7cb8 R08: 0000000000000006 R09: 000000000000007f
R10: 0000000000000030 R11: 0000000000000001 R12: 1ffff110078bcf7f
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000007f
FS:  00007faa113b9700(0000) GS:ffff88806d000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffbc0c139ee06 CR3: 0000000038efa000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000600
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
EXT4-fs: Ignoring removed nomblk_io_submit option
ext4: Unknown parameter 'euid>00000000000000000000'
cgroup: fork rejected by pids controller in /syz3
Process accounting resumed
EXT4-fs: Ignoring removed nomblk_io_submit option
ext4: Unknown parameter 'euid>00000000000000000000'
Process accounting resumed
EXT4-fs: Ignoring removed nomblk_io_submit option
ext4: Unknown parameter 'euid>00000000000000000000'
EXT4-fs: Ignoring removed nomblk_io_submit option
ext4: Unknown parameter 'euid>00000000000000000000'
Process accounting resumed
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
Zero length message leads to an empty skb
----------------
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