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BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_extras drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2439 [inline]
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x34d9/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2707
Write of size 1 at addr ffffc90003633000 by task vivid-000-vid-c/21604

CPU: 3 UID: 0 PID: 21604 Comm: vivid-000-vid-c Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x156/0x4c9 mm/kasan/report.c:482
 kasan_report+0xdf/0x1e0 mm/kasan/report.c:595
 tpg_fill_plane_extras drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2439 [inline]
 tpg_fill_plane_buffer+0x34d9/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2707
 vivid_fillbuff+0x95d/0x3ed0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470
 vivid_thread_vid_cap_tick+0x81b/0x1470 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629
 vivid_thread_vid_cap+0x454/0xd70 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767
 kthread+0x370/0x450 kernel/kthread.c:467
 ret_from_fork+0x754/0xd80 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to a vmalloc virtual mapping
Memory state around the buggy address:
 ffffc90003632f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90003632f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90003633000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90003633080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90003633100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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