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: 0 UID: 0 PID: 7041 Comm: kworker/u8:15 Not tainted 6.13.0-syzkaller-08265-g9c5968db9e62 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Workqueue: events_unbound flush_to_ldisc RIP: 0010:n_tty_receive_buf_common+0xf3/0x1980 drivers/tty/n_tty.c:1718 Code: 00 48 89 74 24 60 4a 8d 3c 39 4a 8d 34 3a 48 89 7c 24 70 48 89 74 24 68 48 89 84 24 a0 00 00 00 e8 72 3e 83 fc 48 8b 44 24 68 <80> 38 00 0f 85 b3 15 00 00 48 8b 44 24 18 48 8b a8 60 22 00 00 48 RSP: 0018:ffffc90005357a68 EFLAGS: 00010293 RAX: dffffc000000044c RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888065f34880 RSI: ffffffff8536703e RDI: dffffc0000000000 RBP: 0000000000000111 R08: 0000000000000001 R09: ffffed100eb59e50 R10: ffff888075acf287 R11: 000000000000000d R12: ffffffff853688e0 R13: 0000000000000000 R14: ffff888075acf000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3107b6 CR3: 00000000675ba000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tty_ldisc_receive_buf+0xa2/0x190 drivers/tty/tty_buffer.c:387 tty_port_default_receive_buf+0x70/0xb0 drivers/tty/tty_port.c:37 receive_buf drivers/tty/tty_buffer.c:445 [inline] flush_to_ldisc+0x264/0x780 drivers/tty/tty_buffer.c:495 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3317 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398 kthread+0x3af/0x750 kernel/kthread.c:464 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:n_tty_receive_buf_common+0xf3/0x1980 drivers/tty/n_tty.c:1718 Code: 00 48 89 74 24 60 4a 8d 3c 39 4a 8d 34 3a 48 89 7c 24 70 48 89 74 24 68 48 89 84 24 a0 00 00 00 e8 72 3e 83 fc 48 8b 44 24 68 <80> 38 00 0f 85 b3 15 00 00 48 8b 44 24 18 48 8b a8 60 22 00 00 48 RSP: 0018:ffffc90005357a68 EFLAGS: 00010293 RAX: dffffc000000044c RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff888065f34880 RSI: ffffffff8536703e RDI: dffffc0000000000 RBP: 0000000000000111 R08: 0000000000000001 R09: ffffed100eb59e50 R10: ffff888075acf287 R11: 000000000000000d R12: ffffffff853688e0 R13: 0000000000000000 R14: ffff888075acf000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3491ee CR3: 00000000562dc000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 48 89 74 24 60 mov %rsi,0x60(%rsp) 5: 4a 8d 3c 39 lea (%rcx,%r15,1),%rdi 9: 4a 8d 34 3a lea (%rdx,%r15,1),%rsi d: 48 89 7c 24 70 mov %rdi,0x70(%rsp) 12: 48 89 74 24 68 mov %rsi,0x68(%rsp) 17: 48 89 84 24 a0 00 00 mov %rax,0xa0(%rsp) 1e: 00 1f: e8 72 3e 83 fc call 0xfc833e96 24: 48 8b 44 24 68 mov 0x68(%rsp),%rax * 29: 80 38 00 cmpb $0x0,(%rax) <-- trapping instruction 2c: 0f 85 b3 15 00 00 jne 0x15e5 32: 48 8b 44 24 18 mov 0x18(%rsp),%rax 37: 48 8b a8 60 22 00 00 mov 0x2260(%rax),%rbp 3e: 48 rex.W