================================================================== 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+0x1b76/0x5ec0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 1440 at addr ffffc9000f7efda0 by task vivid-000-vid-c/8556 CPU: 0 UID: 0 PID: 8556 Comm: vivid-000-vid-c Not tainted 6.15.0-rc7-syzkaller-00112-geccf6f2f6ab9 #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+0xb4/0x290 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+0x29a/0x2b0 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+0x1b76/0x5ec0 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/0x5fe0 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+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the virtual mapping at [ffffc9000f7d9000, ffffc9000f7f1000) 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:0xffff888023cd8600 pfn:0x23cd8 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff888023cd8600 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 8555, tgid 8552 (syz.3.516), ts 365643663248, free_ts 365279827956 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1714 prep_new_page mm/page_alloc.c:1722 [inline] get_page_from_freelist+0x21ce/0x22b0 mm/page_alloc.c:3684 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4966 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:3592 [inline] __vmalloc_area_node mm/vmalloc.c:3670 [inline] __vmalloc_node_range_noprof+0x8fe/0x12c0 mm/vmalloc.c:3845 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3997 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+0x9bf/0x15a0 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xc31/0x1420 drivers/media/common/videobuf2/videobuf2-core.c:964 __vb2_init_fileio+0x318/0xff0 drivers/media/common/videobuf2/videobuf2-core.c:2895 __vb2_perform_fileio+0x284/0x1600 drivers/media/common/videobuf2/videobuf2-core.c:3041 vb2_fop_read+0x273/0x360 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x199/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316 do_loop_readv_writev include/linux/uio.h:-1 [inline] vfs_readv+0x5a2/0x840 fs/read_write.c:1018 do_readv+0x14d/0x2d0 fs/read_write.c:1078 page last free pid 8501 tgid 8492 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1258 [inline] __free_frozen_pages+0xb0e/0xcd0 mm/page_alloc.c:2721 __slab_free+0x326/0x400 mm/slub.c:4553 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4147 [inline] slab_alloc_node mm/slub.c:4196 [inline] kmem_cache_alloc_node_noprof+0x1bb/0x3c0 mm/slub.c:4248 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:658 alloc_skb include/linux/skbuff.h:1340 [inline] alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6639 sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2954 sock_alloc_send_skb include/net/sock.h:1832 [inline] __ip_append_data+0x2cf6/0x40f0 net/ipv4/ip_output.c:1119 ip_make_skb+0x1de/0x3f0 net/ipv4/ip_output.c:1567 udp_sendmsg+0x18f6/0x22e0 net/ipv4/udp.c:1478 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x19c/0x270 net/socket.c:727 ____sys_sendmsg+0x52d/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmmsg+0x28e/0x430 net/socket.c:2702 Memory state around the buggy address: ffffc9000f7eff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000f7eff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000f7f0000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000f7f0080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000f7f0100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================