general protection fault, probably for non-canonical address 0xdffffc000000044c: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x0000000000002260-0x0000000000002267]
CPU: 1 PID: 995 Comm: kworker/u4:4 Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:n_tty_receive_buf_common+0x237/0x81d0 drivers/tty/n_tty.c:1653
Code: 00 48 89 84 24 90 01 00 00 4c 89 f3 4c 89 b4 24 30 01 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 ca ca 3d fd 48 8b 9c 24 88 01 00
RSP: 0018:ffffc90004b57988 EFLAGS: 00010202
RAX: 000000000000044c RBX: 0000000000002260 RCX: ffffffff81654bf0
RDX: ffff88801c3cd700 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff84929e61 R09: ffffed100fcb2651
R10: ffffed100fcb2651 R11: 0000000000000000 R12: ffff88801d09c820
R13: dffffc0000000000 R14: 0000000000002260 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe46a839090 CR3: 0000000075868000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 tty_port_default_receive_buf+0x6a/0x90 drivers/tty/tty_port.c:39
 receive_buf drivers/tty/tty_buffer.c:491 [inline]
 flush_to_ldisc+0x2f2/0x580 drivers/tty/tty_buffer.c:543
 process_one_work+0x853/0x1140 kernel/workqueue.c:2298
 worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
 kthread+0x468/0x490 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30
 </TASK>
Modules linked in:
---[ end trace 41d25228b7de739d ]---
RIP: 0010:n_tty_receive_buf_common+0x237/0x81d0 drivers/tty/n_tty.c:1653
Code: 00 48 89 84 24 90 01 00 00 4c 89 f3 4c 89 b4 24 30 01 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 ca ca 3d fd 48 8b 9c 24 88 01 00
RSP: 0018:ffffc90004b57988 EFLAGS: 00010202
RAX: 000000000000044c RBX: 0000000000002260 RCX: ffffffff81654bf0
RDX: ffff88801c3cd700 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff84929e61 R09: ffffed100fcb2651
R10: ffffed100fcb2651 R11: 0000000000000000 R12: ffff88801d09c820
R13: dffffc0000000000 R14: 0000000000002260 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe46a839090 CR3: 0000000075868000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 48 89             	add    %cl,-0x77(%rax)
   3:	84 24 90             	test   %ah,(%rax,%rdx,4)
   6:	01 00                	add    %eax,(%rax)
   8:	00 4c 89 f3          	add    %cl,-0xd(%rcx,%rcx,4)
   c:	4c 89 b4 24 30 01 00 	mov    %r14,0x130(%rsp)
  13:	00
  14:	66 2e 0f 1f 84 00 00 	nopw   %cs:0x0(%rax,%rax,1)
  1b:	00 00 00
  1e:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 ca ca 3d fd       	callq  0xfd3dcb03
  39:	48                   	rex.W
  3a:	8b                   	.byte 0x8b
  3b:	9c                   	pushfq
  3c:	24 88                	and    $0x88,%al
  3e:	01 00                	add    %eax,(%rax)