================================================================== BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2624 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x21d2/0x43c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 5120 at addr ffffc90006c81000 by task vivid-000-vid-c/26753 CPU: 3 UID: 0 PID: 26753 Comm: vivid-000-vid-c Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __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:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:194 [inline] kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:200 __asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2624 [inline] tpg_fill_plane_buffer+0x21d2/0x43c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 vivid_fillbuff+0x8d2/0x4250 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 vivid_thread_vid_cap_tick+0x814/0x15d0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x454/0xda0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x3c5/0x780 kernel/kthread.c:463 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 The buggy address belongs to a 1-page vmalloc region starting at 0xffffc90006c81000 allocated at vb2_vmalloc_alloc+0x135/0x410 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888027b16e00 pfn:0x27b16 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: ffff888027b16e00 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 26752, tgid 26751 (syz.1.5839), ts 533859520834, free_ts 533859495947 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1af/0x220 mm/page_alloc.c:1846 prep_new_page mm/page_alloc.c:1854 [inline] get_page_from_freelist+0xd0b/0x31a0 mm/page_alloc.c:3915 __alloc_frozen_pages_noprof+0x25f/0x2430 mm/page_alloc.c:5210 __alloc_pages_noprof mm/page_alloc.c:5244 [inline] alloc_pages_bulk_noprof+0x77a/0x1410 mm/page_alloc.c:5164 alloc_pages_bulk_mempolicy_noprof+0x244/0x12a0 mm/mempolicy.c:2794 vm_area_alloc_pages mm/vmalloc.c:3693 [inline] __vmalloc_area_node mm/vmalloc.c:3863 [inline] __vmalloc_node_range_noprof+0xb98/0x16b0 mm/vmalloc.c:4051 vmalloc_user_noprof+0x9e/0xe0 mm/vmalloc.c:4205 vb2_vmalloc_alloc+0x135/0x410 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x8c9/0x1280 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xa90/0xfe0 drivers/media/common/videobuf2/videobuf2-core.c:964 __vb2_init_fileio+0x3f1/0x1100 drivers/media/common/videobuf2/videobuf2-core.c:2895 __vb2_perform_fileio+0x9c2/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:3041 vb2_fop_read+0x215/0x3e0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x229/0x360 drivers/media/v4l2-core/v4l2-dev.c:316 vfs_read+0x1e4/0xcf0 fs/read_write.c:570 ksys_read+0x12a/0x250 fs/read_write.c:715 page last free pid 26752 tgid 26751 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0x7df/0x1170 mm/page_alloc.c:2943 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x149/0x220 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:579 [inline] alloc_vmap_area+0x98d/0x2a50 mm/vmalloc.c:2124 __get_vm_area_node+0x1ca/0x330 mm/vmalloc.c:3219 __vmalloc_node_range_noprof+0x247/0x16b0 mm/vmalloc.c:4011 vmalloc_user_noprof+0x9e/0xe0 mm/vmalloc.c:4205 vb2_vmalloc_alloc+0x135/0x410 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline] __vb2_queue_alloc+0x8c9/0x1280 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0xa90/0xfe0 drivers/media/common/videobuf2/videobuf2-core.c:964 __vb2_init_fileio+0x3f1/0x1100 drivers/media/common/videobuf2/videobuf2-core.c:2895 __vb2_perform_fileio+0x9c2/0x1660 drivers/media/common/videobuf2/videobuf2-core.c:3041 vb2_fop_read+0x215/0x3e0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x229/0x360 drivers/media/v4l2-core/v4l2-dev.c:316 vfs_read+0x1e4/0xcf0 fs/read_write.c:570 ksys_read+0x12a/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 Memory state around the buggy address: ffffc90006c81f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90006c81f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90006c82000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90006c82080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90006c82100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================