================================================================== 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 5120 at addr ffffc900038c3000 by task vivid-000-vid-c/4076 CPU: 1 UID: 0 PID: 4076 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/0x1d0 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 1-page vmalloc region starting at 0xffffc900038c3000 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:0x20000001e pfn:0x16120d flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) raw: 057ff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 000000020000001e 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 4074, tgid 4072 (syz.1.8766), ts 1048957951659, free_ts 1048957937416 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x153/0x170 mm/page_alloc.c:1858 prep_new_page mm/page_alloc.c:1866 [inline] get_page_from_freelist+0x11a6/0x33b0 mm/page_alloc.c:3946 __alloc_frozen_pages_noprof+0x27c/0x2bc0 mm/page_alloc.c:5226 __alloc_pages_noprof mm/page_alloc.c:5260 [inline] alloc_pages_bulk_noprof+0x657/0x1390 mm/page_alloc.c:5180 alloc_pages_bulk_mempolicy_noprof+0x255/0x1270 mm/mempolicy.c:2798 vm_area_alloc_pages mm/vmalloc.c:3700 [inline] __vmalloc_area_node mm/vmalloc.c:3878 [inline] __vmalloc_node_range_noprof+0x69d/0x1630 mm/vmalloc.c:4064 vmalloc_user_noprof+0x9e/0xe0 mm/vmalloc.c:4218 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_core_poll+0x611/0x740 drivers/media/common/videobuf2/videobuf2-core.c:2713 vb2_poll+0x4b/0xe0 drivers/media/common/videobuf2/videobuf2-v4l2.c:979 vb2_fop_poll+0x10e/0x350 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245 v4l2_poll+0x15f/0x220 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:82 [inline] do_pollfd fs/select.c:866 [inline] do_poll fs/select.c:909 [inline] do_sys_poll+0x6e5/0xe90 fs/select.c:1004 page last free pid 4074 tgid 4072 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] __free_pages_prepare mm/page_alloc.c:1402 [inline] __free_frozen_pages+0x747/0x1040 mm/page_alloc.c:2943 __kasan_populate_vmalloc_do mm/kasan/shadow.c:393 [inline] __kasan_populate_vmalloc+0x1ea/0x210 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0x95d/0x2b70 mm/vmalloc.c:2123 __get_vm_area_node+0x1ca/0x330 mm/vmalloc.c:3226 __vmalloc_node_range_noprof+0x228/0x1630 mm/vmalloc.c:4024 vmalloc_user_noprof+0x9e/0xe0 mm/vmalloc.c:4218 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_core_poll+0x611/0x740 drivers/media/common/videobuf2/videobuf2-core.c:2713 vb2_poll+0x4b/0xe0 drivers/media/common/videobuf2/videobuf2-v4l2.c:979 vb2_fop_poll+0x10e/0x350 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245 v4l2_poll+0x15f/0x220 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:82 [inline] do_pollfd fs/select.c:866 [inline] do_poll fs/select.c:909 [inline] do_sys_poll+0x6e5/0xe90 fs/select.c:1004 __do_sys_ppoll fs/select.c:1101 [inline] __se_sys_ppoll fs/select.c:1081 [inline] __x64_sys_ppoll+0x2b5/0x350 fs/select.c:1081 Memory state around the buggy address: ffffc900038c3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc900038c3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc900038c4000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc900038c4080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc900038c4100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================