BUG: unable to handle kernel paging request at ffff888001000108 PGD de01067 P4D de01067 PUD de02067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 28011 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:__writel arch/x86/include/asm/io.h:71 [inline] RIP: 0010:slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RIP: 0010:cfb_imageblit+0x99b/0x1040 drivers/video/fbdev/core/cfbimgblt.c:302 Code: e0 09 44 24 04 e8 55 a2 c7 fd 45 39 e7 0f 87 44 ff ff ff e8 57 a1 c7 fd 48 8b 44 24 08 8b 4c 24 04 48 8d 78 04 48 89 7c 24 08 <89> 08 44 89 e6 44 89 ff e8 28 a2 c7 fd 45 39 e7 0f 85 04 ff ff ff RSP: 0018:ffff888065e9f5b8 EFLAGS: 00010246 RAX: ffff888001000108 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff839ae419 RDI: ffff88800100010c RBP: 0000000000000028 R08: 00000000000005c9 R09: 000000000000001c R10: 0000000000000004 R11: 0000000000000000 R12: 000000000000001c R13: 0000000000000000 R14: ffff888238d6d33e R15: 000000000000001c FS: 00007f6c730b0700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000108 CR3: 000000007523b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1207 [inline] vga16fb_imageblit+0x6b4/0x2260 drivers/video/fbdev/vga16fb.c:1260 bit_putcs_unaligned drivers/video/fbdev/core/bitblit.c:139 [inline] bit_putcs+0x6e2/0xd10 drivers/video/fbdev/core/bitblit.c:188 fbcon_putcs+0x336/0x4f0 drivers/video/fbdev/core/fbcon.c:1269 con_flush drivers/tty/vt/vt.c:2577 [inline] do_con_write+0x1269/0x1d90 drivers/tty/vt/vt.c:2782 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3163 process_output_block drivers/tty/n_tty.c:593 [inline] n_tty_write+0x3c0/0xff0 drivers/tty/n_tty.c:2331 do_tty_write drivers/tty/tty_io.c:960 [inline] tty_write+0x496/0x810 drivers/tty/tty_io.c:1044 __vfs_write+0xf7/0x770 fs/read_write.c:485 vfs_write+0x1f3/0x540 fs/read_write.c:549 ksys_write+0x12b/0x2a0 fs/read_write.c:599 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f6c7473b279 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6c730b0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f6c7484df80 RCX: 00007f6c7473b279 RDX: 0000000000001006 RSI: 0000000020001040 RDI: 0000000000000007 RBP: 00007f6c747952e9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffeff8912ff R14: 00007f6c730b0300 R15: 0000000000022000 Modules linked in: CR2: ffff888001000108 ---[ end trace ba84d3d73bcd5751 ]--- RIP: 0010:__writel arch/x86/include/asm/io.h:71 [inline] RIP: 0010:slow_imageblit drivers/video/fbdev/core/cfbimgblt.c:178 [inline] RIP: 0010:cfb_imageblit+0x99b/0x1040 drivers/video/fbdev/core/cfbimgblt.c:302 Code: e0 09 44 24 04 e8 55 a2 c7 fd 45 39 e7 0f 87 44 ff ff ff e8 57 a1 c7 fd 48 8b 44 24 08 8b 4c 24 04 48 8d 78 04 48 89 7c 24 08 <89> 08 44 89 e6 44 89 ff e8 28 a2 c7 fd 45 39 e7 0f 85 04 ff ff ff RSP: 0018:ffff888065e9f5b8 EFLAGS: 00010246 RAX: ffff888001000108 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff839ae419 RDI: ffff88800100010c RBP: 0000000000000028 R08: 00000000000005c9 R09: 000000000000001c R10: 0000000000000004 R11: 0000000000000000 R12: 000000000000001c R13: 0000000000000000 R14: ffff888238d6d33e R15: 000000000000001c FS: 00007f6c730b0700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff888001000108 CR3: 000000007523b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e0 09 loopne 0xb 2: 44 24 04 rex.R and $0x4,%al 5: e8 55 a2 c7 fd callq 0xfdc7a25f a: 45 39 e7 cmp %r12d,%r15d d: 0f 87 44 ff ff ff ja 0xffffff57 13: e8 57 a1 c7 fd callq 0xfdc7a16f 18: 48 8b 44 24 08 mov 0x8(%rsp),%rax 1d: 8b 4c 24 04 mov 0x4(%rsp),%ecx 21: 48 8d 78 04 lea 0x4(%rax),%rdi 25: 48 89 7c 24 08 mov %rdi,0x8(%rsp) * 2a: 89 08 mov %ecx,(%rax) <-- trapping instruction 2c: 44 89 e6 mov %r12d,%esi 2f: 44 89 ff mov %r15d,%edi 32: e8 28 a2 c7 fd callq 0xfdc7a25f 37: 45 39 e7 cmp %r12d,%r15d 3a: 0f 85 04 ff ff ff jne 0xffffff44