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BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2624 [inline]
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x21d2/0x43c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705
Write of size 2560 at addr ffffc9000f6fa000 by task vivid-000-vid-c/13832

CPU: 0 UID: 0 PID: 13832 Comm: vivid-000-vid-c Not tainted 6.15.0-rc4-syzkaller-00147-gebd297a2affa #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xc3/0x670 mm/kasan/report.c:521
 kasan_report+0xe0/0x110 mm/kasan/report.c:634
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
 __asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106
 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2624 [inline]
 tpg_fill_plane_buffer+0x21d2/0x43c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705
 vivid_fillbuff+0x8d2/0x4250 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470
 vivid_thread_vid_cap_tick+0x814/0x15d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629
 vivid_thread_vid_cap+0x454/0xda0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc9000f6d2000, ffffc9000f6fb000) created by:
 vb2_vmalloc_alloc+0x135/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47

Memory state around the buggy address:
 ffffc9000f6f9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc9000f6f9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc9000f6fa000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc9000f6fa080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000f6fa100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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