================================================================== 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+0x209a/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 Write of size 1280 at addr ffffc90005dafbe1 by task vivid-000-vid-c/2687 CPU: 1 UID: 0 PID: 2687 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 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x13d/0x4b0 mm/kasan/report.c:482 kasan_report+0xdf/0x1c0 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:186 [inline] kasan_check_range+0x10f/0x1e0 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+0x209a/0x4160 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705 vivid_fillbuff+0x963/0x3ff0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 vivid_thread_vid_cap_tick+0x81b/0x1470 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:629 vivid_thread_vid_cap+0x454/0xd70 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:767 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 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 vmalloc virtual mapping The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xeeb pfn:0x49e2f flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000eeb 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 0x29c2(GFP_NOWAIT|__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_ZERO), pid 2686, tgid 2685 (syz.0.8215), ts 675646629006, free_ts 675640594300 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0xfd/0x120 mm/page_alloc.c:1859 prep_new_page mm/page_alloc.c:1867 [inline] get_page_from_freelist+0xf48/0x3530 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x299/0x2dc0 mm/page_alloc.c:5304 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490 alloc_pages_noprof+0x1a/0x160 mm/mempolicy.c:2581 vm_area_alloc_pages mm/vmalloc.c:3667 [inline] __vmalloc_area_node mm/vmalloc.c:3892 [inline] __vmalloc_node_range_noprof+0xf9a/0x1630 mm/vmalloc.c:4082 vmalloc_user_noprof+0x9e/0xe0 mm/vmalloc.c:4237 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+0x8d5/0x1160 drivers/media/common/videobuf2/videobuf2-core.c:523 vb2_core_reqbufs+0x899/0xf30 drivers/media/common/videobuf2/videobuf2-core.c:958 __vb2_init_fileio+0x32d/0x1000 drivers/media/common/videobuf2/videobuf2-core.c:2879 __vb2_perform_fileio+0x9ba/0x1380 drivers/media/common/videobuf2/videobuf2-core.c:3025 vb2_fop_read+0x211/0x520 drivers/media/common/videobuf2/videobuf2-v4l2.c:1215 v4l2_read+0x229/0x2c0 drivers/media/v4l2-core/v4l2-dev.c:316 do_loop_readv_writev fs/read_write.c:848 [inline] do_loop_readv_writev fs/read_write.c:836 [inline] vfs_readv+0x5d8/0x8d0 fs/read_write.c:1021 do_readv+0x13e/0x340 fs/read_write.c:1081 page last free pid 30112 tgid 30112 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1406 [inline] __free_frozen_pages+0x79f/0x1090 mm/page_alloc.c:2950 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x47/0xf0 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x1a0/0x1f0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4610 [inline] slab_alloc_node mm/slub.c:4939 [inline] kmem_cache_alloc_noprof+0x241/0x6d0 mm/slub.c:4946 ptlock_alloc+0x1f/0x70 mm/memory.c:7531 ptlock_init include/linux/mm.h:3775 [inline] pagetable_pte_ctor include/linux/mm.h:3824 [inline] __pte_alloc_one_noprof include/asm-generic/pgalloc.h:79 [inline] pte_alloc_one+0x82/0x3d0 arch/x86/mm/pgtable.c:18 __pte_alloc+0x6d/0x3e0 mm/memory.c:453 copy_pte_range mm/memory.c:1253 [inline] copy_pmd_range mm/memory.c:1408 [inline] copy_pud_range mm/memory.c:1445 [inline] copy_p4d_range mm/memory.c:1469 [inline] copy_page_range+0x3dd8/0x5b20 mm/memory.c:1555 dup_mmap+0xd44/0x21b0 mm/mmap.c:1840 dup_mm kernel/fork.c:1538 [inline] copy_mm kernel/fork.c:1590 [inline] copy_process+0x4588/0x7ff0 kernel/fork.c:2288 kernel_clone+0x176/0x9d0 kernel/fork.c:2746 __do_sys_clone+0xd9/0x120 kernel/fork.c:2887 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90005daff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90005daff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90005db0000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90005db0080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90005db0100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================