BUG: unable to handle page fault for address: fffff5200087b200 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23fff5067 P4D 23fff5067 PUD 1c6b8067 PMD 21bb0067 PTE 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 16350 Comm: syz.2.2202 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] RIP: 0010:bitfill drivers/video/fbdev/core/fb_fillrect.h:133 [inline] RIP: 0010:fb_fillrect_static drivers/video/fbdev/core/fb_fillrect.h:219 [inline] RIP: 0010:fb_fillrect drivers/video/fbdev/core/fb_fillrect.h:278 [inline] RIP: 0010:sys_fillrect+0xc77/0x1910 drivers/video/fbdev/core/sysfillrect.c:24 Code: 00 00 48 8d 3c f5 00 00 00 00 48 89 44 24 20 48 89 7c 24 10 48 89 74 24 30 eb 03 45 89 ef e8 b0 9a c7 fc 4c 89 e1 48 c1 e9 03 <42> 80 3c 31 00 0f 85 c0 0a 00 00 48 8b 44 24 08 49 89 2c 24 49 8d RSP: 0018:ffffc90004fff658 EFLAGS: 00010a06 RAX: 0000000000020b53 RBX: 0000000000000180 RCX: 1ffff9200087b200 RDX: 0000000000080000 RSI: ffffffff85407410 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000004 R10: 0000000000000180 R11: 0000000000000000 R12: ffffc900043d9000 R13: ffffc900043d9000 R14: dffffc0000000000 R15: 0000000000000004 FS: 00007f5521e176c0(0000) GS:ffff88812434c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff5200087b200 CR3: 0000000076656000 CR4: 00000000003526f0 Call Trace: drm_fbdev_shmem_defio_fillrect+0x22/0x140 drivers/gpu/drm/drm_fbdev_shmem.c:39 bit_clear+0x17d/0x220 drivers/video/fbdev/core/bitblit.c:73 __fbcon_clear+0x633/0x760 drivers/video/fbdev/core/fbcon.c:1327 fbcon_scroll+0x48b/0x650 drivers/video/fbdev/core/fbcon.c:1881 con_scroll+0x464/0x690 drivers/tty/vt/vt.c:582 csi_M drivers/tty/vt/vt.c:2134 [inline] csi_ECMA drivers/tty/vt/vt.c:2553 [inline] do_con_trol drivers/tty/vt/vt.c:2727 [inline] do_con_write+0x6883/0x8540 drivers/tty/vt/vt.c:3222 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3558 process_output_block drivers/tty/n_tty.c:557 [inline] n_tty_write+0x44f/0x12d0 drivers/tty/n_tty.c:2366 iterate_tty_write drivers/tty/tty_io.c:1006 [inline] file_tty_write.isra.0+0x4d2/0x890 drivers/tty/tty_io.c:1081 tty_write drivers/tty/tty_io.c:1102 [inline] redirected_tty_write drivers/tty/tty_io.c:1125 [inline] redirected_tty_write+0xd4/0x120 drivers/tty/tty_io.c:1105 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6ac/0x1070 fs/read_write.c:688 ksys_write+0x12a/0x250 fs/read_write.c:740 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x106/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5520f9c799 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:00007f5521e17028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f5521215fa0 RCX: 00007f5520f9c799 RDX: 000000000000fdef RSI: 0000200000000000 RDI: 0000000000000003 RBP: 00007f5521032bd9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5521216038 R14: 00007f5521215fa0 R15: 00007ffe95f82748 Modules linked in: CR2: fffff5200087b200 ---[ end trace 0000000000000000 ]--- RIP: 0010:fb_write_offset drivers/video/fbdev/core/sysmem.h:30 [inline] RIP: 0010:bitfill drivers/video/fbdev/core/fb_fillrect.h:133 [inline] RIP: 0010:fb_fillrect_static drivers/video/fbdev/core/fb_fillrect.h:219 [inline] RIP: 0010:fb_fillrect drivers/video/fbdev/core/fb_fillrect.h:278 [inline] RIP: 0010:sys_fillrect+0xc77/0x1910 drivers/video/fbdev/core/sysfillrect.c:24 Code: 00 00 48 8d 3c f5 00 00 00 00 48 89 44 24 20 48 89 7c 24 10 48 89 74 24 30 eb 03 45 89 ef e8 b0 9a c7 fc 4c 89 e1 48 c1 e9 03 <42> 80 3c 31 00 0f 85 c0 0a 00 00 48 8b 44 24 08 49 89 2c 24 49 8d RSP: 0018:ffffc90004fff658 EFLAGS: 00010a06 RAX: 0000000000020b53 RBX: 0000000000000180 RCX: 1ffff9200087b200 RDX: 0000000000080000 RSI: ffffffff85407410 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000004 R10: 0000000000000180 R11: 0000000000000000 R12: ffffc900043d9000 R13: ffffc900043d9000 R14: dffffc0000000000 R15: 0000000000000004 FS: 00007f5521e176c0(0000) GS:ffff88812434c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff5200087b200 CR3: 0000000076656000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 8d 3c f5 00 00 00 lea 0x0(,%rsi,8),%rdi 9: 00 a: 48 89 44 24 20 mov %rax,0x20(%rsp) f: 48 89 7c 24 10 mov %rdi,0x10(%rsp) 14: 48 89 74 24 30 mov %rsi,0x30(%rsp) 19: eb 03 jmp 0x1e 1b: 45 89 ef mov %r13d,%r15d 1e: e8 b0 9a c7 fc call 0xfcc79ad3 23: 4c 89 e1 mov %r12,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 42 80 3c 31 00 cmpb $0x0,(%rcx,%r14,1) <-- trapping instruction 2f: 0f 85 c0 0a 00 00 jne 0xaf5 35: 48 8b 44 24 08 mov 0x8(%rsp),%rax 3a: 49 89 2c 24 mov %rbp,(%r12) 3e: 49 rex.WB 3f: 8d .byte 0x8d