================================================================== BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2582 [inline] BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x133e/0x3df0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2670 Write of size 360 at addr ffffc9000aad9ea0 by task vivid-000-vid-c/14860 CPU: 1 PID: 14860 Comm: vivid-000-vid-c Not tainted 6.1.0-rc1-syzkaller-00093-g6d36c728bc2e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x45d mm/kasan/report.c:395 kasan_report+0xbb/0x1f0 mm/kasan/report.c:495 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0x13d/0x180 mm/kasan/generic.c:189 memcpy+0x39/0x60 mm/kasan/shadow.c:66 tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2582 [inline] tpg_fill_plane_buffer+0x133e/0x3df0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2670 vivid_fillbuff+0x1ac1/0x3ea0 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:470 vivid_thread_vid_cap_tick+0x800/0x2200 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:729 vivid_thread_vid_cap+0x62d/0xc00 drivers/media/test-drivers/vivid/vivid-kthread-cap.c:872 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 The buggy address belongs to the virtual mapping at [ffffc9000aad9000, ffffc9000aadb000) created by: vb2_vmalloc_alloc+0x11e/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 The buggy address belongs to the physical page: page:ffffea00020c7440 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x831d1 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 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_NOWARN|__GFP_ZERO), pid 14859, tgid 14857 (syz-executor.3), ts 1851193695225, free_ts 1850398653333 prep_new_page mm/page_alloc.c:2538 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4287 __alloc_pages+0x1c7/0x5a0 mm/page_alloc.c:5554 __alloc_pages_bulk+0xa02/0x15b0 mm/page_alloc.c:5502 alloc_pages_bulk_array_mempolicy+0x1b3/0x360 mm/mempolicy.c:2375 vm_area_alloc_pages mm/vmalloc.c:2947 [inline] __vmalloc_area_node mm/vmalloc.c:3043 [inline] __vmalloc_node_range+0x576/0x13a0 mm/vmalloc.c:3213 vmalloc_user+0x67/0x80 mm/vmalloc.c:3367 vb2_vmalloc_alloc+0x11e/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47 __vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:233 [inline] __vb2_queue_alloc+0x60b/0x1180 drivers/media/common/videobuf2/videobuf2-core.c:444 vb2_core_reqbufs+0x7e5/0xd70 drivers/media/common/videobuf2/videobuf2-core.c:838 __vb2_init_fileio+0x33d/0xd00 drivers/media/common/videobuf2/videobuf2-core.c:2636 __vb2_perform_fileio+0xc36/0x1210 drivers/media/common/videobuf2/videobuf2-core.c:2761 vb2_fop_read+0x207/0x3f0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1174 v4l2_read+0x21c/0x2b0 drivers/media/v4l2-core/v4l2-dev.c:314 do_loop_readv_writev fs/read_write.c:756 [inline] do_loop_readv_writev fs/read_write.c:743 [inline] do_iter_read+0x4f8/0x750 fs/read_write.c:798 vfs_readv+0xe5/0x150 fs/read_write.c:916 do_preadv fs/read_write.c:1008 [inline] __do_sys_preadv fs/read_write.c:1058 [inline] __se_sys_preadv fs/read_write.c:1053 [inline] __x64_sys_preadv+0x22b/0x310 fs/read_write.c:1053 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1458 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1508 free_unref_page_prepare mm/page_alloc.c:3386 [inline] free_unref_page+0x19/0x4d0 mm/page_alloc.c:3482 tlb_batch_list_free mm/mmu_gather.c:75 [inline] tlb_finish_mmu+0x1a3/0x7e0 mm/mmu_gather.c:366 exit_mmap+0x1fe/0x7a0 mm/mmap.c:3098 __mmput+0x128/0x4c0 kernel/fork.c:1185 mmput+0x5c/0x70 kernel/fork.c:1207 exit_mm kernel/exit.c:516 [inline] do_exit+0xa39/0x2a20 kernel/exit.c:807 do_group_exit+0xd0/0x2a0 kernel/exit.c:950 get_signal+0x21a1/0x2430 kernel/signal.c:2858 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:296 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd Memory state around the buggy address: ffffc9000aad9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000aad9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000aada000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000aada080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000aada100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================