BUG: unable to handle page fault for address: fffff52000970a00 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 17fff5067 P4D 17fff5067 PUD 1eaaf067 PMD 2854f067 PTE 0 Oops: Oops: 0000 [#1] SMP KASAN NOPTI CPU: 3 UID: 0 PID: 12211 Comm: syz.1.1820 Tainted: G L Y syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP, [Y]=FORCED_BIND Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 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 d0 02 8a 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:ffffc90003b3f5d8 EFLAGS: 00010a06 RAX: 000000000000a483 RBX: 0000000000000190 RCX: 1ffff92000970a00 RDX: 0000000000080000 RSI: ffffffff85841840 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000004 R10: 0000000000000190 R11: 0000000000000000 R12: ffffc90004b85000 R13: ffffc90004b85000 R14: dffffc0000000000 R15: 0000000000000004 FS: 00007f1ca45886c0(0000) GS:ffff8880d47b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000970a00 CR3: 00000000521f7000 CR4: 0000000000352ef0 DR0: 0000000000010000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 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:72 __fbcon_clear+0x633/0x760 drivers/video/fbdev/core/fbcon.c:1381 fbcon_scroll+0x48b/0x650 drivers/video/fbdev/core/fbcon.c:1933 con_scroll+0x464/0x690 drivers/tty/vt/vt.c:616 csi_M drivers/tty/vt/vt.c:2193 [inline] csi_ECMA.constprop.0+0x1238/0x3b60 drivers/tty/vt/vt.c:2616 do_con_trol drivers/tty/vt/vt.c:2831 [inline] do_con_write+0x366b/0x4ae0 drivers/tty/vt/vt.c:3328 con_write+0x23/0xb0 drivers/tty/vt/vt.c:3664 process_output_block drivers/tty/n_tty.c:557 [inline] n_tty_write+0x440/0x1200 drivers/tty/n_tty.c:2366 iterate_tty_write drivers/tty/tty_io.c:1008 [inline] file_tty_write.isra.0+0x4ca/0x8f0 drivers/tty/tty_io.c:1056 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x6af/0x1050 fs/read_write.c:687 ksys_write+0x12a/0x250 fs/read_write.c:739 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1ca379f559 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:00007f1ca4588028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f1ca3a25fa0 RCX: 00007f1ca379f559 RDX: 0000000000001006 RSI: 0000200000000140 RDI: 0000000000000003 RBP: 00007f1ca3836b20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f1ca3a26038 R14: 00007f1ca3a25fa0 R15: 00007fffea3d3738 Modules linked in: CR2: fffff52000970a00 ---[ 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 d0 02 8a 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:ffffc90003b3f5d8 EFLAGS: 00010a06 RAX: 000000000000a483 RBX: 0000000000000190 RCX: 1ffff92000970a00 RDX: 0000000000080000 RSI: ffffffff85841840 RDI: 0000000000000010 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000004 R10: 0000000000000190 R11: 0000000000000000 R12: ffffc90004b85000 R13: ffffc90004b85000 R14: dffffc0000000000 R15: 0000000000000004 FS: 00007f1ca45886c0(0000) GS:ffff8880d47b4000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff52000970a00 CR3: 00000000521f7000 CR4: 0000000000352ef0 DR0: 0000000000010000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- 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 d0 02 8a fc call 0xfc8a02f3 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