RDX: 0000000020000000 RSI: 0000000000008916 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000007 R13: 00000000000006c5 R14: 00000000004c9441 R15: 000000000000000c ================================================================== BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:347 [inline] BUG: KASAN: global-out-of-bounds in fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421 Read of size 32 at addr ffffffff870689a0 by task syz-executor.5/26604 CPU: 0 PID: 26604 Comm: syz-executor.5 Not tainted 4.14.171-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x142/0x197 lib/dump_stack.c:58 print_address_description.cold+0x5/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 check_memory_region_inline mm/kasan/kasan.c:260 [inline] check_memory_region+0x123/0x190 mm/kasan/kasan.c:267 memcpy+0x24/0x50 mm/kasan/kasan.c:302 memcpy include/linux/string.h:347 [inline] fbcon_get_font+0x288/0x550 drivers/video/fbdev/core/fbcon.c:2421 con_font_get drivers/tty/vt/vt.c:4078 [inline] con_font_op+0x1d5/0x1060 drivers/tty/vt/vt.c:4229 vt_ioctl+0xb80/0x2170 drivers/tty/vt/vt_ioctl.c:927 tty_ioctl+0x841/0x1320 drivers/tty/tty_io.c:2661 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x7ae/0x1060 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:692 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x45c449 RSP: 002b:00007f09deab2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f09deab36d4 RCX: 000000000045c449 RDX: 0000000020000100 RSI: 0000000000004b60 RDI: 0000000000000003 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000328 R14: 00000000004c54bb R15: 000000000076bf2c The buggy address belongs to the variable: fontdata_8x16+0x1000/0x1120 Memory state around the buggy address: ffffffff87068880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff87068900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff87068980: 00 00 00 00 fa fa fa fa 06 fa fa fa fa fa fa fa ^ ffffffff87068a00: 05 fa fa fa fa fa fa fa 06 fa fa fa fa fa fa fa ffffffff87068a80: 00 00 03 fa fa fa fa fa 00 00 00 00 00 00 00 00 ==================================================================