================================================================== BUG: KASAN: global-out-of-bounds in memcpy include/linux/string.h:406 [inline] BUG: KASAN: global-out-of-bounds in fbcon_get_font+0x2f4/0x6f0 drivers/video/fbdev/core/fbcon.c:2475 Read of size 32 at addr ffffffff8896abe0 by task syz-executor.2/3016 CPU: 1 PID: 3016 Comm: syz-executor.2 Not tainted 5.8.0-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+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 check_memory_region_inline mm/kasan/generic.c:186 [inline] check_memory_region+0x13d/0x180 mm/kasan/generic.c:192 memcpy+0x20/0x60 mm/kasan/common.c:105 memcpy include/linux/string.h:406 [inline] fbcon_get_font+0x2f4/0x6f0 drivers/video/fbdev/core/fbcon.c:2475 con_font_get drivers/tty/vt/vt.c:4570 [inline] con_font_op+0x1f5/0x1110 drivers/tty/vt/vt.c:4729 vt_io_ioctl drivers/tty/vt/vt_ioctl.c:595 [inline] vt_ioctl+0x1be1/0x2c20 drivers/tty/vt/vt_ioctl.c:846 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45ce69 Code: 2d 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 fb b5 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8972204c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000000e500 RCX: 000000000045ce69 RDX: 0000000020000100 RSI: 0000000000004b60 RDI: 0000000000000006 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007fff3fad4faf R14: 00007f89722059c0 R15: 000000000118bf2c The buggy address belongs to the variable: fontdata_8x16+0x1000/0x1120 Memory state around the buggy address: ffffffff8896aa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffffff8896ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffffff8896ab80: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9 ^ ffffffff8896ac00: 06 f9 f9 f9 f9 f9 f9 f9 05 f9 f9 f9 f9 f9 f9 f9 ffffffff8896ac80: 06 f9 f9 f9 f9 f9 f9 f9 00 00 03 f9 f9 f9 f9 f9 ==================================================================