================================================================== BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:380 [inline] BUG: KASAN: global-out-of-bounds in soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70 Read of size 32 at addr ffffffff8872a360 by task syz-executor.2/24342 CPU: 0 PID: 24342 Comm: syz-executor.2 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x197/0x210 lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x30b mm/kasan/report.c:374 __kasan_report.cold+0x1b/0x41 mm/kasan/report.c:506 kasan_report+0x12/0x20 mm/kasan/common.c:639 check_memory_region_inline mm/kasan/generic.c:185 [inline] check_memory_region+0x134/0x1a0 mm/kasan/generic.c:192 memcpy+0x24/0x50 mm/kasan/common.c:125 memcpy include/linux/string.h:380 [inline] soft_cursor+0x439/0xa30 drivers/video/fbdev/core/softcursor.c:70 bit_cursor+0x12fc/0x1a60 drivers/video/fbdev/core/bitblit.c:386 fbcon_cursor+0x487/0x660 drivers/video/fbdev/core/fbcon.c:1402 hide_cursor+0x9d/0x2b0 drivers/tty/vt/vt.c:895 redraw_screen+0x60b/0x7d0 drivers/tty/vt/vt.c:988 fbcon_do_set_font+0x829/0x960 drivers/video/fbdev/core/fbcon.c:2605 fbcon_copy_font+0x12c/0x190 drivers/video/fbdev/core/fbcon.c:2620 con_font_copy drivers/tty/vt/vt.c:4594 [inline] con_font_op+0x6b2/0x1270 drivers/tty/vt/vt.c:4609 vt_ioctl+0x181a/0x26d0 drivers/tty/vt/vt_ioctl.c:965 tty_ioctl+0xa37/0x14f0 drivers/tty/tty_io.c:2660 vfs_ioctl fs/ioctl.c:47 [inline] file_ioctl fs/ioctl.c:545 [inline] do_vfs_ioctl+0x977/0x14e0 fs/ioctl.c:732 ksys_ioctl+0xab/0xd0 fs/ioctl.c:749 __do_sys_ioctl fs/ioctl.c:756 [inline] __se_sys_ioctl fs/ioctl.c:754 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:754 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45a909 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f61bb330c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a909 RDX: 0000000020000040 RSI: 0000000000004b72 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f61bb3316d4 R13: 00000000004c3a41 R14: 00000000004d8f78 R15: 00000000ffffffff The buggy address belongs to the variable: oid_index+0x520/0xb80 Memory state around the buggy address: ffffffff8872a200: 00 07 fa fa fa fa fa fa 00 06 fa fa fa fa fa fa ffffffff8872a280: 06 fa fa fa fa fa fa fa 00 00 00 04 fa fa fa fa >ffffffff8872a300: 00 00 fa fa fa fa fa fa 00 00 06 fa fa fa fa fa ^ ffffffff8872a380: 00 06 fa fa fa fa fa fa 00 00 00 00 fa fa fa fa ffffffff8872a400: 00 00 01 fa fa fa fa fa 06 fa fa fa fa fa fa fa ==================================================================