BUG: unable to handle page fault for address: ffffc900046b9000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page PGD 17400067 P4D 17400067 PUD 17622067 PMD 248e3067 PTE 0 Oops: 0002 [#1] PREEMPT SMP KASAN CPU: 0 PID: 16999 Comm: syz.4.2547 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:memset64 arch/x86/include/asm/string_64.h:64 [inline] RIP: 0010:memset_l include/linux/string.h:169 [inline] RIP: 0010:bitfill_aligned+0x18e/0x230 drivers/video/fbdev/core/sysfillrect.c:53 Code: 48 31 c3 49 89 1e eb 73 e8 af d8 2c 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 e5 db 2c fd 4d 85 ff 74 3a e8 7b d8 2c RSP: 0018:ffffc900036672e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000000017a RCX: 000000000000017a RDX: 0000000000000000 RSI: 00000000000130ac RDI: ffffc900046b9000 RBP: 0000000000000040 R08: 0000000000005e80 R09: 0000000000000040 R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000 R13: ffffc900046b9000 R14: ffffffffffffffff R15: 0000000000000000 FS: 00007fbc808396c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900046b9000 CR3: 00000000285ab000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sys_fillrect+0x5e0/0x7d0 drivers/video/fbdev/core/sysfillrect.c:281 drm_fb_helper_sys_fillrect+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:834 bit_clear+0x15f/0x1f0 drivers/video/fbdev/core/bitblit.c:73 __fbcon_clear+0x4c3/0x820 drivers/video/fbdev/core/fbcon.c:1283 fbcon_scroll+0x43e/0x760 drivers/video/fbdev/core/fbcon.c:1851 con_scroll+0x50e/0x7a0 drivers/tty/vt/vt.c:630 csi_M+0xa8/0x140 drivers/tty/vt/vt.c:2055 do_con_trol drivers/tty/vt/vt.c:2463 [inline] do_con_write+0x4289/0x6c40 drivers/tty/vt/vt.c:2951 con_write+0x1f/0x40 drivers/tty/vt/vt.c:3295 process_output_block drivers/tty/n_tty.c:586 [inline] n_tty_write+0xd61/0x11e0 drivers/tty/n_tty.c:2377 do_tty_write drivers/tty/tty_io.c:1018 [inline] file_tty_write+0x4c7/0x840 drivers/tty/tty_io.c:1089 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x482/0x9a0 fs/read_write.c:584 ksys_write+0x14d/0x260 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fbc7f99e0d9 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:00007fbc80839028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fbc7fc26180 RCX: 00007fbc7f99e0d9 RDX: 0000000000001006 RSI: 0000200000000000 RDI: 0000000000000008 RBP: 00007fbc7fa35024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fbc7fc26218 R14: 00007fbc7fc26180 R15: 00007ffc903699a8 Modules linked in: CR2: ffffc900046b9000 ---[ end trace 0000000000000000 ]--- RIP: 0010:memset64 arch/x86/include/asm/string_64.h:64 [inline] RIP: 0010:memset_l include/linux/string.h:169 [inline] RIP: 0010:bitfill_aligned+0x18e/0x230 drivers/video/fbdev/core/sysfillrect.c:53 Code: 48 31 c3 49 89 1e eb 73 e8 af d8 2c 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 e5 db 2c fd 4d 85 ff 74 3a e8 7b d8 2c RSP: 0018:ffffc900036672e8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 000000000000017a RCX: 000000000000017a RDX: 0000000000000000 RSI: 00000000000130ac RDI: ffffc900046b9000 RBP: 0000000000000040 R08: 0000000000005e80 R09: 0000000000000040 R10: 0000000000000001 R11: 0000000000000002 R12: 0000000000000000 R13: ffffc900046b9000 R14: ffffffffffffffff R15: 0000000000000000 FS: 00007fbc808396c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900046b9000 CR3: 00000000285ab000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- 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 af d8 2c fd call 0xfd2cd8bc 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 e5 db 2c fd call 0xfd2cdc1c 37: 4d 85 ff test %r15,%r15 3a: 74 3a je 0x76 3c: e8 .byte 0xe8 3d: 7b d8 jnp 0x17 3f: 2c .byte 0x2c