================================================================== 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+0x1b4f/0x5ea0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 2880 at addr ffffc90002e1e500 by task vivid-000-vid-c/13218 CPU: 1 UID: 0 PID: 13218 Comm: vivid-000-vid-c Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 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 check_region_inline mm/kasan/generic.c:-1 [inline] 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+0x1b4f/0x5ea0 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+0x115c/0x6340 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x927/0x11e0 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 9-page vmalloc region starting at 0xffffc90002e16000 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:0xffff88804cf01000 pfn:0x4cf01 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff88804cf01000 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 0x102dc2(GFP_HIGHUSER|__GFP_ZERO|__GFP_NOWARN), pid 13212, tgid 13211 (syz.4.20029), ts 3036316017887, free_ts 3036315987261 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0x21fa/0x2270 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5304 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5338 alloc_pages_bulk_noprof+0x5f5/0x7b0 mm/page_alloc.c:5230 alloc_pages_bulk_mempolicy_noprof+0x34b/0x1690 mm/mempolicy.c:2798 vm_area_alloc_pages mm/vmalloc.c:3714 [inline] __vmalloc_area_node mm/vmalloc.c:3892 [inline] __vmalloc_node_range_noprof+0xb1d/0x1730 mm/vmalloc.c:4082 vmalloc_user_noprof+0xad/0xe0 mm/vmalloc.c:4237 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+0xa0b/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc3f/0x1470 drivers/media/common/videobuf2/videobuf2-core.c:958 __vb2_init_fileio+0x310/0x1040 drivers/media/common/videobuf2/videobuf2-core.c:2879 __vb2_perform_fileio+0x287/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:3025 vb2_fop_read+0x282/0x360 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x19c/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316 do_loop_readv_writev fs/read_write.c:848 [inline] vfs_readv+0x57c/0x850 fs/read_write.c:1021 page last free pid 13212 tgid 13211 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0xc1f/0xd10 mm/page_alloc.c:2950 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1a8/0x1c0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd1a/0x1420 mm/vmalloc.c:2123 __get_vm_area_node+0x1f2/0x300 mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x358/0x1730 mm/vmalloc.c:4042 vmalloc_user_noprof+0xad/0xe0 mm/vmalloc.c:4237 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+0xa0b/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc3f/0x1470 drivers/media/common/videobuf2/videobuf2-core.c:958 __vb2_init_fileio+0x310/0x1040 drivers/media/common/videobuf2/videobuf2-core.c:2879 __vb2_perform_fileio+0x287/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:3025 vb2_fop_read+0x282/0x360 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x19c/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316 do_loop_readv_writev fs/read_write.c:848 [inline] vfs_readv+0x57c/0x850 fs/read_write.c:1021 do_preadv fs/read_write.c:1133 [inline] __do_compat_sys_preadv fs/read_write.c:1236 [inline] __se_compat_sys_preadv fs/read_write.c:1230 [inline] __ia32_compat_sys_preadv+0x1eb/0x300 fs/read_write.c:1230 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x23e/0x6f0 arch/x86/entry/syscall_32.c:307 Memory state around the buggy address: ffffc90002e1ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90002e1ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90002e1f000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90002e1f080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90002e1f100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================