general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 5181 Comm: kworker/0:5 Not tainted 6.5.0-rc4-next-20230804-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: pm pm_runtime_work
RIP: 0010:serial8250_tx_chars+0x3bb/0xf60 drivers/tty/serial/8250/8250_port.c:1812
Code: 05 00 00 e8 c7 60 ed fc 48 8b 44 24 30 80 38 00 0f 85 2d 0a 00 00 4d 03 a5 a0 03 00 00 4c 89 e0 4c 89 e2 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 86 09 00 00 48 8b 44 24 18 41
RSP: 0018:ffffc90004c17a20 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff92323fe0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff849961d9 RDI: ffffffff92324290
RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff92324104
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88801c480c30 R14: 0000000000000010 R15: 0000000000000fff
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002057eff8 CR3: 000000007ced3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __start_tx drivers/tty/serial/8250/8250_port.c:1547 [inline]
 serial8250_start_tx+0x7a8/0x980 drivers/tty/serial/8250/8250_port.c:1656
 serial_port_runtime_resume+0x29e/0x330 drivers/tty/serial/serial_port.c:40
 __rpm_callback+0xc5/0x4c0 drivers/base/power/runtime.c:392
 rpm_callback+0x1da/0x220 drivers/base/power/runtime.c:446
 rpm_resume+0xdb9/0x1980 drivers/base/power/runtime.c:912
 pm_runtime_work+0x12e/0x180 drivers/base/power/runtime.c:977
 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2603
 worker_thread+0x687/0x1110 kernel/workqueue.c:2754
 kthread+0x33a/0x430 kernel/kthread.c:389
 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:serial8250_tx_chars+0x3bb/0xf60 drivers/tty/serial/8250/8250_port.c:1812
Code: 05 00 00 e8 c7 60 ed fc 48 8b 44 24 30 80 38 00 0f 85 2d 0a 00 00 4d 03 a5 a0 03 00 00 4c 89 e0 4c 89 e2 48 c1 e8 03 83 e2 07 <0f> b6 04 28 38 d0 7f 08 84 c0 0f 85 86 09 00 00 48 8b 44 24 18 41
RSP: 0018:ffffc90004c17a20 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffffffff92323fe0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff849961d9 RDI: ffffffff92324290
RBP: dffffc0000000000 R08: 0000000000000004 R09: ffffffff92324104
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88801c480c30 R14: 0000000000000010 R15: 0000000000000fff
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002057eff8 CR3: 000000007ced3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	e8 c7 60 ed fc       	call   0xfced60ce
   7:	48 8b 44 24 30       	mov    0x30(%rsp),%rax
   c:	80 38 00             	cmpb   $0x0,(%rax)
   f:	0f 85 2d 0a 00 00    	jne    0xa42
  15:	4d 03 a5 a0 03 00 00 	add    0x3a0(%r13),%r12
  1c:	4c 89 e0             	mov    %r12,%rax
  1f:	4c 89 e2             	mov    %r12,%rdx
  22:	48 c1 e8 03          	shr    $0x3,%rax
  26:	83 e2 07             	and    $0x7,%edx
* 29:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax <-- trapping instruction
  2d:	38 d0                	cmp    %dl,%al
  2f:	7f 08                	jg     0x39
  31:	84 c0                	test   %al,%al
  33:	0f 85 86 09 00 00    	jne    0x9bf
  39:	48 8b 44 24 18       	mov    0x18(%rsp),%rax
  3e:	41                   	rex.B