BUG: unable to handle page fault for address: ffffc90003e89000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 18800067 P4D 18800067 PUD 1aa4a067 PMD 141776067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8875 Comm: syz.0.1146 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:memset64 arch/x86/include/asm/string_64.h:58 [inline] RIP: 0010:memset_l include/linux/string.h:169 [inline] RIP: 0010:bitfill_aligned+0x192/0x240 drivers/video/fbdev/core/sysfillrect.c:53 Code: 48 31 c3 49 89 1e eb 73 e8 9b 2c 07 fd 44 89 e3 4c 8b 64 24 08 4c 8b 2c 24 89 d8 31 d2 f7 f5 89 c3 4c 89 e0 4c 89 ef 48 89 d9 48 ab 31 ff 44 89 fe e8 21 30 07 fd 4d 85 ff 74 3a e8 67 2c 07 RSP: 0018:ffffc900051171a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000180 RCX: 0000000000000180 RDX: 0000000000000000 RSI: 000000000001cce4 RDI: ffffc90003e89000 RBP: 0000000000000040 R08: 0000000000006000 R09: 0000000000000040 R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000 R13: ffffc90003e89000 R14: ffffffffffffffff R15: 0000000000000000 FS: 00007f7a53bf66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003e89000 CR3: 000000002f458000 CR4: 00000000003506f0 Call Trace: sys_fillrect+0x609/0x820 drivers/video/fbdev/core/sysfillrect.c:281 drm_fbdev_generic_defio_fillrect+0x2c/0x110 drivers/gpu/drm/drm_fbdev_generic.c:37 bit_clear+0x163/0x1f0 drivers/video/fbdev/core/bitblit.c:73 __fbcon_clear+0x4c3/0x820 drivers/video/fbdev/core/fbcon.c:1284 fbcon_scroll+0x442/0x760 drivers/video/fbdev/core/fbcon.c:1848 con_scroll+0x77d/0xa00 drivers/tty/vt/vt.c:577 csi_M+0xa8/0x140 drivers/tty/vt/vt.c:2009 do_con_trol drivers/tty/vt/vt.c:2417 [inline] do_con_write+0x4b50/0x70a0 drivers/tty/vt/vt.c:2905 con_put_char+0x83/0xc0 drivers/tty/vt/vt.c:3253 tty_put_char+0xc9/0x150 drivers/tty/tty_io.c:3143 do_output_char+0x6ab/0x960 drivers/tty/n_tty.c:474 process_output drivers/tty/n_tty.c:500 [inline] n_tty_write+0xdee/0x11e0 drivers/tty/n_tty.c:2406 iterate_tty_write drivers/tty/tty_io.c:1017 [inline] file_tty_write+0x529/0x960 drivers/tty/tty_io.c:1088 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x474/0x9a0 fs/read_write.c:584 ksys_write+0x151/0x260 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f7a5599e1d9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7a53bf6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f7a55c25fa0 RCX: 00007f7a5599e1d9 RDX: 0000000000001006 RSI: 0000200000001040 RDI: 0000000000000004 RBP: 00007f7a55a35888 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7a55c26038 R14: 00007f7a55c25fa0 R15: 00007fffb3eaed28 Modules linked in: CR2: ffffc90003e89000 ---[ end trace 0000000000000000 ]--- RIP: 0010:memset64 arch/x86/include/asm/string_64.h:58 [inline] RIP: 0010:memset_l include/linux/string.h:169 [inline] RIP: 0010:bitfill_aligned+0x192/0x240 drivers/video/fbdev/core/sysfillrect.c:53 Code: 48 31 c3 49 89 1e eb 73 e8 9b 2c 07 fd 44 89 e3 4c 8b 64 24 08 4c 8b 2c 24 89 d8 31 d2 f7 f5 89 c3 4c 89 e0 4c 89 ef 48 89 d9 48 ab 31 ff 44 89 fe e8 21 30 07 fd 4d 85 ff 74 3a e8 67 2c 07 RSP: 0018:ffffc900051171a0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000180 RCX: 0000000000000180 RDX: 0000000000000000 RSI: 000000000001cce4 RDI: ffffc90003e89000 RBP: 0000000000000040 R08: 0000000000006000 R09: 0000000000000040 R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000 R13: ffffc90003e89000 R14: ffffffffffffffff R15: 0000000000000000 FS: 00007f7a53bf66c0(0000) GS:ffff8880b8c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90003e89000 CR3: 000000002f458000 CR4: 00000000003506f0 ---------------- Code disassembly (best guess): 0: 48 31 c3 xor %rax,%rbx 3: 49 89 1e mov %rbx,(%r14) 6: eb 73 jmp 0x7b 8: e8 9b 2c 07 fd call 0xfd072ca8 d: 44 89 e3 mov %r12d,%ebx 10: 4c 8b 64 24 08 mov 0x8(%rsp),%r12 15: 4c 8b 2c 24 mov (%rsp),%r13 19: 89 d8 mov %ebx,%eax 1b: 31 d2 xor %edx,%edx 1d: f7 f5 div %ebp 1f: 89 c3 mov %eax,%ebx 21: 4c 89 e0 mov %r12,%rax 24: 4c 89 ef mov %r13,%rdi 27: 48 89 d9 mov %rbx,%rcx * 2a: f3 48 ab rep stos %rax,%es:(%rdi) <-- trapping instruction 2d: 31 ff xor %edi,%edi 2f: 44 89 fe mov %r15d,%esi 32: e8 21 30 07 fd call 0xfd073058 37: 4d 85 ff test %r15,%r15 3a: 74 3a je 0x76 3c: e8 .byte 0xe8 3d: 67 2c 07 addr32 sub $0x7,%al