Oops: general protection fault, probably for non-canonical address 0xdffffc000000044c: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: probably user-memory-access in range [0x0000000000002260-0x0000000000002267]
CPU: 1 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.12.0-rc6-syzkaller-00077-g2e1b3cc9d7f7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound flush_to_ldisc
RIP: 0010:n_tty_receive_buf_common+0x13a/0x12e0 drivers/tty/n_tty.c:1718
Code: c0 48 89 84 24 b0 00 00 00 48 89 8c 24 f0 00 00 00 48 c1 e9 03 48 89 8c 24 f8 00 00 00 48 89 5c 24 60 48 8b 84 24 f8 00 00 00 <42> 80 3c 38 00 74 0d 48 8b bc 24 f0 00 00 00 e8 82 1a c0 fc 4c 89
RSP: 0018:ffffc90000ab79a0 EFLAGS: 00010212
RAX: 000000000000044c RBX: ffff888030081438 RCX: 000000000000044c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff888030081000 R08: ffff888030081287 R09: 1ffff11006010250
R10: dffffc0000000000 R11: ffffed1006010251 R12: ffff88805d65c820
R13: ffff88805d65c820 R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30520000 CR3: 0000000029c0c000 CR4: 0000000000350ef0
Call Trace:
<TASK>
tty_port_default_receive_buf+0x6d/0xa0 drivers/tty/tty_port.c:37
receive_buf drivers/tty/tty_buffer.c:445 [inline]
flush_to_ldisc+0x32a/0x860 drivers/tty/tty_buffer.c:495
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa65/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f2/0x390 kernel/kthread.c:389
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:n_tty_receive_buf_common+0x13a/0x12e0 drivers/tty/n_tty.c:1718
Code: c0 48 89 84 24 b0 00 00 00 48 89 8c 24 f0 00 00 00 48 c1 e9 03 48 89 8c 24 f8 00 00 00 48 89 5c 24 60 48 8b 84 24 f8 00 00 00 <42> 80 3c 38 00 74 0d 48 8b bc 24 f0 00 00 00 e8 82 1a c0 fc 4c 89
RSP: 0018:ffffc90000ab79a0 EFLAGS: 00010212
RAX: 000000000000044c RBX: ffff888030081438 RCX: 000000000000044c
RDX: 0000000000000001 RSI: 0000000000000008 RDI: 0000000000000001
RBP: ffff888030081000 R08: ffff888030081287 R09: 1ffff11006010250
R10: dffffc0000000000 R11: ffffed1006010251 R12: ffff88805d65c820
R13: ffff88805d65c820 R14: 0000000000000001 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9d16b37a8c CR3: 000000007df90000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
0: c0 48 89 84 rorb $0x84,-0x77(%rax)
4: 24 b0 and $0xb0,%al
6: 00 00 add %al,(%rax)
8: 00 48 89 add %cl,-0x77(%rax)
b: 8c 24 f0 mov %fs,(%rax,%rsi,8)
e: 00 00 add %al,(%rax)
10: 00 48 c1 add %cl,-0x3f(%rax)
13: e9 03 48 89 8c jmp 0x8c89481b
18: 24 f8 and $0xf8,%al
1a: 00 00 add %al,(%rax)
1c: 00 48 89 add %cl,-0x77(%rax)
1f: 5c pop %rsp
20: 24 60 and $0x60,%al
22: 48 8b 84 24 f8 00 00 mov 0xf8(%rsp),%rax
29: 00
* 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction
2f: 74 0d je 0x3e
31: 48 8b bc 24 f0 00 00 mov 0xf0(%rsp),%rdi
38: 00
39: e8 82 1a c0 fc call 0xfcc01ac0
3e: 4c rex.WR
3f: 89 .byte 0x89