general protection fault, probably for non-canonical address 0xdffffc000000044c: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: probably user-memory-access in range [0x0000000000002260-0x0000000000002267]
CPU: 0 PID: 42 Comm: kworker/u8:2 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:n_tty_receive_buf_common+0x136/0x12c0 drivers/tty/n_tty.c:1708
Code: 00 45 31 ed 48 89 8c 24 e0 00 00 00 48 c1 e9 03 48 89 8c 24 e8 00 00 00 48 89 5c 24 68 4c 89 6c 24 08 48 8b 84 24 e8 00 00 00 <42> 80 3c 30 00 74 0d 48 8b bc 24 e0 00 00 00 e8 e6 2b d7 fc 4c 89
RSP: 0018:ffffc90000b279a8 EFLAGS: 00010202
RAX: 000000000000044c RBX: ffff88807f369438 RCX: 000000000000044c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffff88807f369287 R09: 1ffff1100fe6d250
R10: dffffc0000000000 R11: ffffed100fe6d251 R12: ffff8880203b9020
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880203b9020
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558a191ba000 CR3: 00000000476d4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
tty_port_default_receive_buf+0x6d/0xa0 drivers/tty/tty_port.c:37
receive_buf drivers/tty/tty_buffer.c:444 [inline]
flush_to_ldisc+0x328/0x860 drivers/tty/tty_buffer.c:494
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa00/0x1770 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:n_tty_receive_buf_common+0x136/0x12c0 drivers/tty/n_tty.c:1708
Code: 00 45 31 ed 48 89 8c 24 e0 00 00 00 48 c1 e9 03 48 89 8c 24 e8 00 00 00 48 89 5c 24 68 4c 89 6c 24 08 48 8b 84 24 e8 00 00 00 <42> 80 3c 30 00 74 0d 48 8b bc 24 e0 00 00 00 e8 e6 2b d7 fc 4c 89
RSP: 0018:ffffc90000b279a8 EFLAGS: 00010202
RAX: 000000000000044c RBX: ffff88807f369438 RCX: 000000000000044c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: 0000000000000000 R08: ffff88807f369287 R09: 1ffff1100fe6d250
R10: dffffc0000000000 R11: ffffed100fe6d251 R12: ffff8880203b9020
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880203b9020
FS: 0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa881979198 CR3: 000000002e66c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 00 45 31 add %al,0x31(%rbp)
3: ed in (%dx),%eax
4: 48 89 8c 24 e0 00 00 mov %rcx,0xe0(%rsp)
b: 00
c: 48 c1 e9 03 shr $0x3,%rcx
10: 48 89 8c 24 e8 00 00 mov %rcx,0xe8(%rsp)
17: 00
18: 48 89 5c 24 68 mov %rbx,0x68(%rsp)
1d: 4c 89 6c 24 08 mov %r13,0x8(%rsp)
22: 48 8b 84 24 e8 00 00 mov 0xe8(%rsp),%rax
29: 00
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 0d je 0x3e
31: 48 8b bc 24 e0 00 00 mov 0xe0(%rsp),%rdi
38: 00
39: e8 e6 2b d7 fc call 0xfcd72c24
3e: 4c rex.WR
3f: 89 .byte 0x89