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BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2621 [inline]
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x21a6/0x4350 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2702
Write of size 1280 at addr ffffc90004733b40 by task vivid-000-vid-c/18766

CPU: 0 UID: 0 PID: 18766 Comm: vivid-000-vid-c Not tainted 6.12.0-rc4-syzkaller-00245-gb423f5a9a61f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report+0xd9/0x110 mm/kasan/report.c:601
 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:2621 [inline]
 tpg_fill_plane_buffer+0x21a6/0x4350 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2702
 vivid_fillbuff+0x8e0/0x41f0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470
 vivid_thread_vid_cap_tick+0x81b/0x15d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629
 vivid_thread_vid_cap+0x5b8/0xb90 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

The buggy address belongs to the virtual mapping at
 [ffffc90004731000, ffffc90004735000) created by:
 vb2_vmalloc_alloc+0x11e/0x3d0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x690d2
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 18765, tgid 18764 (syz.8.2452), ts 1422191859924, free_ts 1421003965777
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
 vm_area_alloc_pages mm/vmalloc.c:3568 [inline]
 __vmalloc_area_node mm/vmalloc.c:3646 [inline]
 __vmalloc_node_range_noprof+0x724/0x15a0 mm/vmalloc.c:3828
 vmalloc_user_noprof+0x6b/0x90 mm/vmalloc.c:3982
 vb2_vmalloc_alloc+0x11e/0x3d0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47
 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline]
 __vb2_queue_alloc+0x896/0x1230 drivers/media/common/videobuf2/videobuf2-core.c:523
 vb2_core_reqbufs+0xa73/0xfb0 drivers/media/common/videobuf2/videobuf2-core.c:964
 __vb2_init_fileio+0x3f3/0x1110 drivers/media/common/videobuf2/videobuf2-core.c:2878
 __vb2_perform_fileio+0x9de/0x1620 drivers/media/common/videobuf2/videobuf2-core.c:3024
 vb2_fop_read+0x213/0x3e0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215
 v4l2_read+0x226/0x360 drivers/media/v4l2-core/v4l2-dev.c:314
 do_loop_readv_writev fs/read_write.c:854 [inline]
 do_loop_readv_writev fs/read_write.c:842 [inline]
 vfs_readv+0x6bf/0x890 fs/read_write.c:1027
 do_preadv fs/read_write.c:1142 [inline]
 __do_sys_preadv fs/read_write.c:1192 [inline]
 __se_sys_preadv fs/read_write.c:1187 [inline]
 __x64_sys_preadv+0x22d/0x310 fs/read_write.c:1187
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
page last free pid 970 tgid 970 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
 vfree+0x17a/0x890 mm/vmalloc.c:3361
 delayed_vfree_work+0x56/0x70 mm/vmalloc.c:3282
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffffc90004733f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90004733f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90004734000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                   ^
 ffffc90004734080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc90004734100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
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