================================================================== BUG: KASAN: global-out-of-bounds in __fb_pad_aligned_buffer include/linux/fb.h:655 [inline] BUG: KASAN: global-out-of-bounds in bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline] BUG: KASAN: global-out-of-bounds in bit_putcs+0xbb6/0xd20 drivers/video/fbdev/core/bitblit.c:185 Read of size 1 at addr ffffffff88965720 by task syz-executor.2/9286 CPU: 1 PID: 9286 Comm: syz-executor.2 Not tainted 5.8.0-rc5-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+0x5/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 __fb_pad_aligned_buffer include/linux/fb.h:655 [inline] bit_putcs_aligned drivers/video/fbdev/core/bitblit.c:96 [inline] bit_putcs+0xbb6/0xd20 drivers/video/fbdev/core/bitblit.c:185 fbcon_putcs+0x33c/0x3f0 drivers/video/fbdev/core/fbcon.c:1362 do_update_region+0x399/0x630 drivers/tty/vt/vt.c:683 redraw_screen+0x64c/0x770 drivers/tty/vt/vt.c:1029 fbcon_do_set_font+0x7ec/0x950 drivers/video/fbdev/core/fbcon.c:2615 fbcon_copy_font+0x125/0x190 drivers/video/fbdev/core/fbcon.c:2630 con_font_copy drivers/tty/vt/vt.c:4627 [inline] con_font_op+0x65a/0x1110 drivers/tty/vt/vt.c:4642 vt_ioctl+0x16dc/0x2670 drivers/tty/vt/vt_ioctl.c:980 tty_ioctl+0x1019/0x15f0 drivers/tty/tty_io.c:2656 vfs_ioctl fs/ioctl.c:48 [inline] ksys_ioctl+0x11a/0x180 fs/ioctl.c:753 __do_sys_ioctl fs/ioctl.c:762 [inline] __se_sys_ioctl fs/ioctl.c:760 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:760 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c1d9 Code: Bad RIP value. RSP: 002b:00007fb126267c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000000eec0 RCX: 000000000045c1d9 RDX: 0000000020000400 RSI: 0000000000004b72 RDI: 0000000000000003 RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c R13: 00007ffdb3825f0f R14: 00007fb1262689c0 R15: 000000000078bf0c The buggy address belongs to the variable: oid_index+0x320/0xa00 Memory state around the buggy address: ffffffff88965600: 07 fa fa fa fa fa fa fa 00 01 fa fa fa fa fa fa ffffffff88965680: 00 05 fa fa fa fa fa fa 03 fa fa fa fa fa fa fa >ffffffff88965700: 03 fa fa fa fa fa fa fa 03 fa fa fa fa fa fa fa ^ ffffffff88965780: 00 07 fa fa fa fa fa fa 00 07 fa fa fa fa fa fa ffffffff88965800: 00 06 fa fa fa fa fa fa 06 fa fa fa fa fa fa fa ==================================================================