BUG: unable to handle page fault for address: ffff888001000090 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD e201067 P4D e201067 PUD e202067 PMD 80000000010001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 0 PID: 28422 Comm: syz-executor.3 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline] RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline] RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260 Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 a8 33 86 fd 49 39 ed 75 b6 4c 89 RSP: 0018:ffffc90015e5f0c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888001000091 RCX: 0000000000000002 RDX: ffff888001000090 RSI: ffffffff83f00788 RDI: ffff8880a2d301d2 RBP: ffff8880a2d301d3 R08: ffff8880a2d301df R09: ffff88821a9c8c5f R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880a2d301d3 R14: 00000000a2d301d3 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae400000(0063) knlGS:00000000f55f4b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff888001000090 CR3: 000000004d717000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: soft_cursor+0x514/0xa30 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0xcfe/0x1720 drivers/video/fbdev/core/bitblit.c:377 fbcon_cursor+0x50e/0x620 drivers/video/fbdev/core/fbcon.c:1348 fbcon_scroll+0x248/0x3580 drivers/video/fbdev/core/fbcon.c:1705 con_scroll+0x5b9/0x6d0 drivers/tty/vt/vt.c:629 lf+0x26b/0x2c0 drivers/tty/vt/vt.c:1490 vc_con_write_normal drivers/tty/vt/vt.c:2806 [inline] do_con_write+0xefe/0x1dd0 drivers/tty/vt/vt.c:2910 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3250 n_tty_write+0xa38/0xf80 drivers/tty/n_tty.c:2356 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x4d9/0x870 drivers/tty/tty_io.c:1046 __kernel_write+0x199/0x570 fs/read_write.c:528 write_pipe_buf+0x153/0x1f0 fs/splice.c:819 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x3dc/0x830 fs/splice.c:646 splice_from_pipe fs/splice.c:681 [inline] default_file_splice_write fs/splice.c:831 [inline] do_splice_from fs/splice.c:867 [inline] direct_splice_actor+0x228/0x2f0 fs/splice.c:1036 splice_direct_to_actor+0x38c/0x980 fs/splice.c:991 do_splice_direct+0x1b3/0x280 fs/splice.c:1079 do_sendfile+0x55f/0xd40 fs/read_write.c:1548 __do_compat_sys_sendfile fs/read_write.c:1624 [inline] __se_compat_sys_sendfile fs/read_write.c:1613 [inline] __ia32_compat_sys_sendfile+0x159/0x220 fs/read_write.c:1613 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7ffa549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55f40cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000005 RDX: 0000000020000040 RSI: 000000000000a808 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff888001000090 BUG: unable to handle page fault for address: ffff888001000090 #PF: supervisor write access in kernel mode #PF: error_code(0x0003) - permissions violation PGD e201067 P4D e201067 PUD e202067 PMD 80000000010001e1 Oops: 0003 [#2] PREEMPT SMP KASAN CPU: 0 PID: 28422 Comm: syz-executor.3 Not tainted 5.9.0-rc8-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline] RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline] RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260 Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 a8 33 86 fd 49 39 ed 75 b6 4c 89 RSP: 0018:ffffc90015e5e978 EFLAGS: 00010046 RAX: 0000000000000000 RBX: ffff888001000091 RCX: 0000000000000002 RDX: ffff888001000090 RSI: ffffffff83f00788 RDI: ffff8880a2d301e2 RBP: ffff8880a2d301e3 R08: ffff8880a2d301ef R09: ffff8880ae4255c3 R10: 0000000000000000 R11: 0000000000000001 R12: dffffc0000000000 R13: ffff8880a2d301e3 R14: 00000000a2d301e3 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae400000(0063) knlGS:00000000f55f4b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff888001000090 CR3: 000000004d717000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: soft_cursor+0x514/0xa30 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0xcfe/0x1720 drivers/video/fbdev/core/bitblit.c:377 fbcon_cursor+0x50e/0x620 drivers/video/fbdev/core/fbcon.c:1348 fbcon_blank+0x879/0xc30 drivers/video/fbdev/core/fbcon.c:2244 do_unblank_screen+0x25b/0x470 drivers/tty/vt/vt.c:4402 bust_spinlocks+0x5b/0xe0 lib/bust_spinlocks.c:26 oops_end+0x2b/0xf0 arch/x86/kernel/dumpstack.c:344 no_context+0x5a2/0x9f0 arch/x86/mm/fault.c:747 __bad_area_nosemaphore+0xa9/0x4f0 arch/x86/mm/fault.c:835 do_kern_addr_fault+0x5b/0x6f arch/x86/mm/fault.c:1207 handle_page_fault arch/x86/mm/fault.c:1427 [inline] exc_page_fault+0x168/0x190 arch/x86/mm/fault.c:1482 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline] RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline] RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260 Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 a8 33 86 fd 49 39 ed 75 b6 4c 89 RSP: 0018:ffffc90015e5f0c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888001000091 RCX: 0000000000000002 RDX: ffff888001000090 RSI: ffffffff83f00788 RDI: ffff8880a2d301d2 RBP: ffff8880a2d301d3 R08: ffff8880a2d301df R09: ffff88821a9c8c5f R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880a2d301d3 R14: 00000000a2d301d3 R15: 0000000000000002 soft_cursor+0x514/0xa30 drivers/video/fbdev/core/softcursor.c:74 bit_cursor+0xcfe/0x1720 drivers/video/fbdev/core/bitblit.c:377 fbcon_cursor+0x50e/0x620 drivers/video/fbdev/core/fbcon.c:1348 fbcon_scroll+0x248/0x3580 drivers/video/fbdev/core/fbcon.c:1705 con_scroll+0x5b9/0x6d0 drivers/tty/vt/vt.c:629 lf+0x26b/0x2c0 drivers/tty/vt/vt.c:1490 vc_con_write_normal drivers/tty/vt/vt.c:2806 [inline] do_con_write+0xefe/0x1dd0 drivers/tty/vt/vt.c:2910 con_write+0x22/0xb0 drivers/tty/vt/vt.c:3250 n_tty_write+0xa38/0xf80 drivers/tty/n_tty.c:2356 do_tty_write drivers/tty/tty_io.c:962 [inline] tty_write+0x4d9/0x870 drivers/tty/tty_io.c:1046 __kernel_write+0x199/0x570 fs/read_write.c:528 write_pipe_buf+0x153/0x1f0 fs/splice.c:819 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x3dc/0x830 fs/splice.c:646 splice_from_pipe fs/splice.c:681 [inline] default_file_splice_write fs/splice.c:831 [inline] do_splice_from fs/splice.c:867 [inline] direct_splice_actor+0x228/0x2f0 fs/splice.c:1036 splice_direct_to_actor+0x38c/0x980 fs/splice.c:991 do_splice_direct+0x1b3/0x280 fs/splice.c:1079 do_sendfile+0x55f/0xd40 fs/read_write.c:1548 __do_compat_sys_sendfile fs/read_write.c:1624 [inline] __se_compat_sys_sendfile fs/read_write.c:1613 [inline] __ia32_compat_sys_sendfile+0x159/0x220 fs/read_write.c:1613 do_syscall_32_irqs_on arch/x86/entry/common.c:78 [inline] __do_fast_syscall_32+0x60/0x90 arch/x86/entry/common.c:137 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:160 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7ffa549 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000f55f40cc EFLAGS: 00000296 ORIG_RAX: 00000000000000bb RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000000005 RDX: 0000000020000040 RSI: 000000000000a808 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff888001000090 ---[ end trace 986ae75a24a3cd36 ]--- RIP: 0010:writeb arch/x86/include/asm/io.h:65 [inline] RIP: 0010:vga_imageblit_expand drivers/video/fbdev/vga16fb.c:1176 [inline] RIP: 0010:vga16fb_imageblit+0xbe9/0x2210 drivers/video/fbdev/vga16fb.c:1260 Code: 83 c5 01 48 89 f8 48 89 f9 48 83 c3 01 48 c1 e8 03 83 e1 07 42 0f b6 04 20 38 c8 7f 08 84 c0 0f 85 27 0f 00 00 41 0f b6 45 ff <88> 02 44 89 f6 31 ff 44 29 ee e8 a8 33 86 fd 49 39 ed 75 b6 4c 89 RSP: 0018:ffffc90015e5f0c0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff888001000091 RCX: 0000000000000002 RDX: ffff888001000090 RSI: ffffffff83f00788 RDI: ffff8880a2d301d2 RBP: ffff8880a2d301d3 R08: ffff8880a2d301df R09: ffff88821a9c8c5f R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff8880a2d301d3 R14: 00000000a2d301d3 R15: 0000000000000002 FS: 0000000000000000(0000) GS:ffff8880ae400000(0063) knlGS:00000000f55f4b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffff888001000090 CR3: 000000004d717000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400