do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
==================================================================
RIP: 0023:0xf7faca29
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
BUG: KASAN: global-out-of-bounds in tpg_print_str_4+0xbc9/0xd70 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:1820
RSP: 002b:00000000f5fa80cc EFLAGS: 00000296 ORIG_RAX: 0000000000000005
Read of size 1 at addr ffffffff88632850 by task vivid-000-vid-c/28693
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000002680
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000

RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
CPU: 0 PID: 28693 Comm: vivid-000-vid-c Not tainted 4.20.0-rc2+ #236
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+0x244/0x39d lib/dump_stack.c:113
 print_address_description.cold.7+0x58/0x1ff mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.8+0x242/0x309 mm/kasan/report.c:412
 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report.c:430
 tpg_print_str_4+0xbc9/0xd70 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:1820
 tpg_gen_text+0x4ba/0x540 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:1874
 vivid_fillbuff+0x3ff7/0x68e0 drivers/media/platform/vivid/vivid-kthread-cap.c:532
 vivid_thread_vid_cap_tick drivers/media/platform/vivid/vivid-kthread-cap.c:709 [inline]
 vivid_thread_vid_cap+0xbc1/0x2650 drivers/media/platform/vivid/vivid-kthread-cap.c:813
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

The buggy address belongs to the variable:
 font_vga_8x16+0x50/0x60

Memory state around the buggy address:
 ffffffff88632700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff88632780: 00 00 00 00 fa fa fa fa 00 fa fa fa fa fa fa fa
>ffffffff88632800: 00 00 00 00 00 fa fa fa fa fa fa fa 00 00 00 00
                                                 ^
 ffffffff88632880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffffff88632900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 28709 Comm: syz-executor1 Tainted: G    B             4.20.0-rc2+ #236
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+0x244/0x39d lib/dump_stack.c:113
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail.cold.4+0xa/0x17 lib/fault-inject.c:149