BUG: unable to handle page fault for address: ffff887f9e4df0a0 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 8526 Comm: syz.3.541 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:vcs_scr_readw+0x75/0xd0 drivers/tty/vt/vt.c:4999 Code: 51 2b 5d fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 04 84 d2 75 40 <0f> b7 2b e8 23 2b 5d fc 5b 89 e8 5d c3 cc cc cc cc e8 15 2b 5d fc RSP: 0018:ffffc9000c137bd8 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff887f9e4df0a0 RCX: ffffffff855ddd35 RDX: 0000000000000000 RSI: ffffffff855ddd3f RDI: 0000000000000006 RBP: ffff8880258974ce R08: 0000000000000006 R09: ffff8880258974ce R10: ffff887f9e4df0a0 R11: ffffffff82202dea R12: 0000000000000000 R13: ffff888035083006 R14: ffff887f9e4df0a0 R15: ffff887f9e4df0a2 FS: 00007fd1c43676c0(0000) GS:ffff8881246c3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f9e4df0a0 CR3: 000000001cee8000 CR4: 00000000003526f0 Call Trace: vcs_read_buf drivers/tty/vt/vc_screen.c:352 [inline] vcs_read+0x636/0xbe0 drivers/tty/vt/vc_screen.c:444 vfs_read+0x1e1/0xcf0 fs/read_write.c:570 ksys_pread64 fs/read_write.c:763 [inline] __do_sys_pread64 fs/read_write.c:771 [inline] __se_sys_pread64 fs/read_write.c:768 [inline] __x64_sys_pread64+0x1eb/0x250 fs/read_write.c:768 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd1c358ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd1c4367038 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007fd1c37b5fa0 RCX: 00007fd1c358ebe9 RDX: 000000000000c721 RSI: 0000200000000040 RDI: 0000000000000006 RBP: 00007fd1c3611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd1c37b6038 R14: 00007fd1c37b5fa0 R15: 00007ffc597f2638 Modules linked in: CR2: ffff887f9e4df0a0 ---[ end trace 0000000000000000 ]--- RIP: 0010:vcs_scr_readw+0x75/0xd0 drivers/tty/vt/vt.c:4999 Code: 51 2b 5d fc 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 01 38 d0 7c 04 84 d2 75 40 <0f> b7 2b e8 23 2b 5d fc 5b 89 e8 5d c3 cc cc cc cc e8 15 2b 5d fc RSP: 0018:ffffc9000c137bd8 EFLAGS: 00010246 RAX: 0000000000000001 RBX: ffff887f9e4df0a0 RCX: ffffffff855ddd35 RDX: 0000000000000000 RSI: ffffffff855ddd3f RDI: 0000000000000006 RBP: ffff8880258974ce R08: 0000000000000006 R09: ffff8880258974ce R10: ffff887f9e4df0a0 R11: ffffffff82202dea R12: 0000000000000000 R13: ffff888035083006 R14: ffff887f9e4df0a0 R15: ffff887f9e4df0a2 FS: 00007fd1c43676c0(0000) GS:ffff8881246c3000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f9e4df0a0 CR3: 000000001cee8000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 51 push %rcx 1: 2b 5d fc sub -0x4(%rbp),%ebx 4: 48 89 da mov %rbx,%rdx 7: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax e: fc ff df 11: 48 c1 ea 03 shr $0x3,%rdx 15: 0f b6 14 02 movzbl (%rdx,%rax,1),%edx 19: 48 89 d8 mov %rbx,%rax 1c: 83 e0 07 and $0x7,%eax 1f: 83 c0 01 add $0x1,%eax 22: 38 d0 cmp %dl,%al 24: 7c 04 jl 0x2a 26: 84 d2 test %dl,%dl 28: 75 40 jne 0x6a * 2a: 0f b7 2b movzwl (%rbx),%ebp <-- trapping instruction 2d: e8 23 2b 5d fc call 0xfc5d2b55 32: 5b pop %rbx 33: 89 e8 mov %ebp,%eax 35: 5d pop %rbp 36: c3 ret 37: cc int3 38: cc int3 39: cc int3 3a: cc int3 3b: e8 15 2b 5d fc call 0xfc5d2b55