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BUG: KASAN: slab-out-of-bounds in change_page_attr_set_clr+0x625/0xfc0
Read of size 8 at addr ffff888026158408 by task syz.3.5286/20601

CPU: 0 UID: 0 PID: 20601 Comm: syz.3.5286 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 change_page_attr_set_clr+0x625/0xfc0
 _set_pages_array+0x145/0x270
 drm_gem_shmem_get_pages_locked+0x2d0/0x440
 drm_gem_shmem_pin_locked+0x22c/0x460
 drm_gem_map_attach+0x19c/0x1f0
 dma_buf_dynamic_attach+0x1ea/0x3d0
 drm_gem_shmem_prime_import_no_map+0xc1/0x2f0
 drm_gem_prime_fd_to_handle+0x196/0x4d0
 drm_ioctl_kernel+0x2cf/0x390
 drm_ioctl+0x67f/0xb10
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f012178ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f01226c1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f01219c6090 RCX: 00007f012178ebe9
RDX: 0000200000000300 RSI: 00000000c00c642e RDI: 0000000000000008
RBP: 00007f0121811e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f01219c6128 R14: 00007f01219c6090 R15: 00007ffc6ad8bc48
 </TASK>

Allocated by task 20601:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kvmalloc_node_noprof+0x5cd/0x910
 drm_gem_get_pages+0x166/0xa20
 drm_gem_shmem_get_pages_locked+0x201/0x440
 drm_gem_shmem_pin_locked+0x22c/0x460
 drm_gem_map_attach+0x19c/0x1f0
 dma_buf_dynamic_attach+0x1ea/0x3d0
 drm_gem_shmem_prime_import_no_map+0xc1/0x2f0
 drm_gem_prime_fd_to_handle+0x196/0x4d0
 drm_ioctl_kernel+0x2cf/0x390
 drm_ioctl+0x67f/0xb10
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888026158000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 0 bytes to the right of
 allocated 1032-byte region [ffff888026158000, ffff888026158408)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x26158
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801a842000 dead000000000100 dead000000000122
raw: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801a842000 dead000000000100 dead000000000122
head: 0000000000000000 0000000080080008 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000985601 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 17260963202, free_ts 0
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x330
 ___slab_alloc+0xbd1/0x13f0
 __slab_alloc+0x55/0xa0
 __kvmalloc_node_noprof+0x6ba/0x910
 v4l2_ctrl_new+0xfba/0x1790
 v4l2_ctrl_new_custom+0x57c/0x7b0
 vivid_create_controls+0xdd6/0x3a60
 vivid_probe+0x41bf/0x7180
 platform_probe+0xf9/0x190
 really_probe+0x26d/0x9e0
 __driver_probe_device+0x18c/0x2f0
 driver_probe_device+0x4f/0x430
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888026158300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888026158380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888026158400: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff888026158480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888026158500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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