================================================================== BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:-1 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x1b9b/0x5ec0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 1280 at addr ffffc90003e5bb40 by task vivid-000-vid-c/20670 CPU: 1 UID: 0 PID: 20670 Comm: vivid-000-vid-c Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description+0x55/0x1e0 mm/kasan/report.c:378 print_report+0x58/0x70 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 kasan_ch[ 834.455396][T20670] check_region_inline mm/kasan/generic.c:-1 [inline] kasan_ch[ 834.455396][T20670] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:-1 [inline] tpg_fill_plane_buffer+0x1b9b/0x5ec0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 vivid_fillbuff drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 [inline] vivid_thread_vid_cap_tick+0x1020/0x5fe0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x91b/0x11c0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to a 3-page vmalloc region starting at 0xffffc90003e59000 allocated at vb2_vmalloc_alloc+0xef/0x360 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88803d4be400 pfn:0x3d4be flags: 0x80000000000000(node=0|zone=1) raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88803d4be400 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_ZERO|__GFP_NOWARN), pid 20669, tgid 20668 (syz.6.5217), ts 834405480091, free_ts 834405301747 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1861 prep_new_page mm/page_alloc.c:1869 [inline] get_page_from_freelist+0x27d6/0x2850 mm/page_alloc.c:3949 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5292 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5326 alloc_pages_bulk_noprof+0x67e/0x890 mm/page_alloc.c:5218 alloc_pages_bulk_mempolicy_noprof+0x438/0x16e0 mm/mempolicy.c:2798 vm_area_alloc_pages mm/vmalloc.c:3694 [inline] __vmalloc_area_node mm/vmalloc.c:3872 [inline] __vmalloc_node_range_noprof+0xad1/0x1750 mm/vmalloc.c:4062 vmalloc_user_noprof+0xad/0xe0 mm/vmalloc.c:4217 vb2_vmalloc_alloc+0xef/0x360 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x9c5/0x15a0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc1f/0x1410 drivers/media/common/videobuf2/videobuf2-core.c:958 __vb2_init_fileio+0x318/0xff0 drivers/media/common/videobuf2/videobuf2-core.c:2879 vb2_core_poll+0x4c1/0x830 drivers/media/common/videobuf2/videobuf2-core.c:2713 vb2_poll drivers/media/common/videobuf2/videobuf2-v4l2.c:979 [inline] vb2_fop_poll+0x199/0x310 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245 v4l2_poll+0x14a/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:82 [inline] do_pollfd fs/select.c:866 [inline] do_poll fs/select.c:909 [inline] do_sys_poll+0x92e/0xf50 fs/select.c:1004 page last free pid 20669 tgid 20668 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1405 [inline] __free_frozen_pages+0x1075/0x11b0 mm/page_alloc.c:2946 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1b2/0x1d0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd47/0x1480 mm/vmalloc.c:2123 __get_vm_area_node+0x226/0x350 mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x36a/0x1750 mm/vmalloc.c:4022 vmalloc_user_noprof+0xad/0xe0 mm/vmalloc.c:4217 vb2_vmalloc_alloc+0xef/0x360 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x9c5/0x15a0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc1f/0x1410 drivers/media/common/videobuf2/videobuf2-core.c:958 __vb2_init_fileio+0x318/0xff0 drivers/media/common/videobuf2/videobuf2-core.c:2879 vb2_core_poll+0x4c1/0x830 drivers/media/common/videobuf2/videobuf2-core.c:2713 vb2_poll drivers/media/common/videobuf2/videobuf2-v4l2.c:979 [inline] vb2_fop_poll+0x199/0x310 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245 v4l2_poll+0x14a/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:82 [inline] do_pollfd fs/select.c:866 [inline] do_poll fs/select.c:909 [inline] do_sys_poll+0x92e/0xf50 fs/select.c:1004 __do_sys_ppoll fs/select.c:1101 [inline] __se_sys_ppoll+0x209/0x2b0 fs/select.c:1081 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffffc90003e5bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90003e5bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90003e5c000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90003e5c080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90003e5c100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 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