xt_connbytes: Forcing CT accounting to be enabled
xt_CHECKSUM: CHECKSUM should be avoided.  If really needed, restrict with "-p udp" and only use in OUTPUT
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in bitfill_aligned+0x316/0x730 drivers/video/fbdev/core/sysfillrect.c:54
Write of size 8 at addr ffffc90004b71000 by task syz.4.633/6749

CPU: 0 PID: 6749 Comm: syz.4.633 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
 print_address_description+0x60/0x2d0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xdf/0x130 mm/kasan/report.c:451
 bitfill_aligned+0x316/0x730 drivers/video/fbdev/core/sysfillrect.c:54
 sys_fillrect+0x600/0x800 drivers/video/fbdev/core/sysfillrect.c:291
 drm_fb_helper_sys_fillrect+0x2e/0x510 drivers/gpu/drm/drm_fb_helper.c:763
 bit_clear+0x15f/0x1f0 drivers/video/fbdev/core/bitblit.c:73
 __fbcon_clear+0x596/0xa30 drivers/video/fbdev/core/fbcon.c:1248
 fbcon_scroll+0x3a6/0x690 drivers/video/fbdev/core/fbcon.c:1750
 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+0x4291/0x6c40 drivers/tty/vt/vt.c:2951
 con_write+0x1f/0x40 drivers/tty/vt/vt.c:3295
 process_output_block drivers/tty/n_tty.c:592 [inline]
 n_tty_write+0xd19/0x1220 drivers/tty/n_tty.c:2339
 do_tty_write drivers/tty/tty_io.c:1038 [inline]
 file_tty_write+0x50c/0x8a0 drivers/tty/tty_io.c:1110
 call_write_iter include/linux/fs.h:2179 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x748/0xd70 fs/read_write.c:594
 ksys_write+0x153/0x260 fs/read_write.c:647
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f406bb39159
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:00007f4069d4f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f406bdc1180 RCX: 00007f406bb39159
RDX: 0000000000001006 RSI: 0000200000000000 RDI: 0000000000000007
RBP: 00007f406bbd003b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f406bdc1218 R14: 00007f406bdc1180 R15: 00007ffcd7056bb8
 </TASK>


Memory state around the buggy address:
 ffffc90004b70f00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004b70f80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90004b71000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004b71080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004b71100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================