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BUG: KASAN: vmalloc-out-of-bounds in memcpy include/linux/fortify-string.h:225 [inline]
BUG: KASAN: vmalloc-out-of-bounds in dma_buf_map_memcpy_to include/linux/dma-buf-map.h:247 [inline]
BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_damage_blit_real drivers/gpu/drm/drm_fb_helper.c:388 [inline]
BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_damage_blit drivers/gpu/drm/drm_fb_helper.c:419 [inline]
BUG: KASAN: vmalloc-out-of-bounds in drm_fb_helper_damage_work+0x6c9/0xac0 drivers/gpu/drm/drm_fb_helper.c:450
Read of size 12288 at addr ffffc9000486f000 by task kworker/3:0/9306

CPU: 3 PID: 9306 Comm: kworker/3:0 Not tainted 5.16.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events drm_fb_helper_damage_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_address_description.constprop.0.cold+0xf/0x303 mm/kasan/report.c:255
 __kasan_report mm/kasan/report.c:442 [inline]
 kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189
 memcpy+0x20/0x60 mm/kasan/shadow.c:65
 memcpy include/linux/fortify-string.h:225 [inline]
 dma_buf_map_memcpy_to include/linux/dma-buf-map.h:247 [inline]
 drm_fb_helper_damage_blit_real drivers/gpu/drm/drm_fb_helper.c:388 [inline]
 drm_fb_helper_damage_blit drivers/gpu/drm/drm_fb_helper.c:419 [inline]
 drm_fb_helper_damage_work+0x6c9/0xac0 drivers/gpu/drm/drm_fb_helper.c:450
 process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
 worker_thread+0x657/0x1110 kernel/workqueue.c:2454
 kthread+0x405/0x4f0 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>


Memory state around the buggy address:
 ffffc90004870f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004870f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004871000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004871080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004871100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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