==================================================================
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]
BUG: KASAN: vmalloc-out-of-bounds in tpg_fill_plane_buffer+0x2cb6/0x43c0 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2705
Write of size 1440 at addr ffffc90003f5fda0 by task vivid-000-vid-c/9194
CPU: 3 UID: 0 PID: 9194 Comm: vivid-000-vid-c Not tainted 6.15.0-rc1-syzkaller-00025-gbec7dcbc242c #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__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:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
__asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106
tpg_fill_plane_pattern drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:2608 [inline]
tpg_fill_plane_buffer+0x2cb6/0x43c0 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+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
The buggy address belongs to the virtual mapping at
[ffffc90003f49000, ffffc90003f61000) created by:
vb2_vmalloc_alloc+0x135/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xf98 pfn:0x5518d
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000f98 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 9192, tgid 9191 (syz.0.877), ts 227050199965, free_ts 209134640878
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1717
prep_new_page mm/page_alloc.c:1725 [inline]
get_page_from_freelist+0x1193/0x39b0 mm/page_alloc.c:3652
__alloc_frozen_pages_noprof+0x263/0x23a0 mm/page_alloc.c:4934
alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301
alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline]
alloc_pages_noprof+0x131/0x390 mm/mempolicy.c:2392
vm_area_alloc_pages mm/vmalloc.c:3591 [inline]
__vmalloc_area_node mm/vmalloc.c:3669 [inline]
__vmalloc_node_range_noprof+0x732/0x1540 mm/vmalloc.c:3844
vmalloc_user_noprof+0x6b/0x90 mm/vmalloc.c:3996
vb2_vmalloc_alloc+0x135/0x3f0 drivers/media/common/videobuf2/videobuf2-vmalloc.c:47
__vb2_buf_mem_alloc drivers/media/common/videobuf2/videobuf2-core.c:242 [inline]
__vb2_queue_alloc+0x8c6/0x1280 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_core_poll+0x5ec/0x700 drivers/media/common/videobuf2/videobuf2-core.c:2729
vb2_poll+0x33/0x150 drivers/media/common/videobuf2/videobuf2-v4l2.c:980
vb2_fop_poll+0x10f/0x2c0 drivers/media/common/videobuf2/videobuf2-v4l2.c:1245
v4l2_poll+0x160/0x320 drivers/media/v4l2-core/v4l2-dev.c:350
vfs_poll include/linux/poll.h:82 [inline]
p9_fd_poll+0x10e/0x2c0 net/9p/trans_fd.c:238
page last free pid 1138 tgid 1138 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1262 [inline]
free_unref_folios+0x999/0x1630 mm/page_alloc.c:2737
folios_put_refs+0x56f/0x740 mm/swap.c:992
release_pages+0x2a2/0x4b0 mm/swap.c:1032
io_free_region+0x102/0x2e0 io_uring/memmap.c:101
io_rings_free io_uring/io_uring.c:2665 [inline]
io_ring_ctx_free io_uring/io_uring.c:2749 [inline]
io_ring_exit_work+0x992/0xf60 io_uring/io_uring.c:2968
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffffc90003f5ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffffc90003f5ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90003f60000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90003f60080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90003f60100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================