================================================================== 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 2560 at addr ffffc9000f05a6bc by task vivid-000-vid-c/23023 CPU: 1 UID: 0 PID: 23023 Comm: vivid-000-vid-c Not tainted 6.15.0-syzkaller-07774-g90b83efa6701 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189 __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+0xfff/0x5fd0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x8d8/0x10d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x70e/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the virtual mapping at [ffffc9000f059000, ffffc9000f05c000) created by: vb2_vmalloc_alloc+0xef/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x5 pfn:0x2853e flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000005 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 23004, tgid 23003 (syz.1.4934), ts 1462496526619, free_ts 1462496480909 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1710 prep_new_page mm/page_alloc.c:1718 [inline] get_page_from_freelist+0x21e0/0x22c0 mm/page_alloc.c:3680 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2392 vm_area_alloc_pages mm/vmalloc.c:3624 [inline] __vmalloc_area_node mm/vmalloc.c:3702 [inline] __vmalloc_node_range_noprof+0x97d/0x1340 mm/vmalloc.c:3877 vmalloc_user_noprof+0xad/0xf0 mm/vmalloc.c:4030 vb2_vmalloc_alloc+0xef/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x9c2/0x15a0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc31/0x1420 drivers/media/common/videobuf2/videobuf2-core.c:964 vb2_ioctl_reqbufs+0x4c0/0x830 drivers/media/common/videobuf2/videobuf2-v4l2.c:1035 __video_do_ioctl+0xc9b/0xdb0 drivers/media/v4l2-core/v4l2-ioctl.c:3132 video_usercopy+0x86e/0x14f0 drivers/media/v4l2-core/v4l2-ioctl.c:3473 v4l2_ioctl+0x18a/0x1e0 drivers/media/v4l2-core/v4l2-dev.c:366 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 page last free pid 23004 tgid 23003 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1254 [inline] __free_frozen_pages+0xc6e/0xe50 mm/page_alloc.c:2717 ___free_pages_bulk mm/kasan/shadow.c:332 [inline] __kasan_populate_vmalloc mm/kasan/shadow.c:375 [inline] kasan_populate_vmalloc+0x118/0x1a0 mm/kasan/shadow.c:417 alloc_vmap_area+0x1e2b/0x24c0 mm/vmalloc.c:2067 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3170 __vmalloc_node_range_noprof+0x301/0x1340 mm/vmalloc.c:3837 vmalloc_user_noprof+0xad/0xf0 mm/vmalloc.c:4030 vb2_vmalloc_alloc+0xef/0x340 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x9c2/0x15a0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc31/0x1420 drivers/media/common/videobuf2/videobuf2-core.c:964 vb2_ioctl_reqbufs+0x4c0/0x830 drivers/media/common/videobuf2/videobuf2-v4l2.c:1035 __video_do_ioctl+0xc9b/0xdb0 drivers/media/v4l2-core/v4l2-ioctl.c:3132 video_usercopy+0x86e/0x14f0 drivers/media/v4l2-core/v4l2-ioctl.c:3473 v4l2_ioctl+0x18a/0x1e0 drivers/media/v4l2-core/v4l2-dev.c:366 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc9000f05af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000f05af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000f05b000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000f05b080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000f05b100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================