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BUG: KASAN: slab-out-of-bounds in __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
BUG: KASAN: slab-out-of-bounds in cpa_flush arch/x86/mm/pat/set_memory.c:449 [inline]
BUG: KASAN: slab-out-of-bounds in change_page_attr_set_clr+0x625/0xfc0 arch/x86/mm/pat/set_memory.c:2115
Read of size 8 at addr ffff888033e77430 by task syz.6.2170/16114

CPU: 1 UID: 0 PID: 16114 Comm: syz.6.2170 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 __cpa_addr arch/x86/mm/pat/set_memory.c:309 [inline]
 cpa_flush arch/x86/mm/pat/set_memory.c:449 [inline]
 change_page_attr_set_clr+0x625/0xfc0 arch/x86/mm/pat/set_memory.c:2115
 cpa_set_pages_array arch/x86/mm/pat/set_memory.c:2137 [inline]
 _set_pages_array+0x145/0x270 arch/x86/mm/pat/set_memory.c:2521
 drm_gem_shmem_get_pages_locked+0x2d0/0x440 drivers/gpu/drm/drm_gem_shmem_helper.c:214
 drm_gem_shmem_mmap+0x193/0x460 drivers/gpu/drm/drm_gem_shmem_helper.c:646
 drm_gem_mmap_obj+0x187/0x4e0 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x384/0x640 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2283 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region mm/vma.c:2669 [inline]
 mmap_region+0x18a8/0x2100 mm/vma.c:2739
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdf5478ebe9
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:00007fdf529d5038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007fdf549c6180 RCX: 00007fdf5478ebe9
RDX: 0000000000000004 RSI: 0000000000004000 RDI: 0000200000001000
RBP: 00007fdf54811e19 R08: 0000000000000007 R09: 0000000100000000
R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdf549c6218 R14: 00007fdf549c6180 R15: 00007ffed9cce238
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888033e77400 pfn:0x33e74
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f8(unknown)
raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
raw: ffff888033e77400 0000000000000000 00000000f8000000 0000000000000000
head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000
head: ffff888033e77400 0000000000000000 00000000f8000000 0000000000000000
head: 00fff00000000002 ffffea0000cf9d01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0x428c0(GFP_NOWAIT|__GFP_IO|__GFP_FS|__GFP_COMP), pid 16114, tgid 16107 (syz.6.2170), ts 803192497666, free_ts 784022389598
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1850
 prep_new_page mm/page_alloc.c:1858 [inline]
 get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3863
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5153
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416
 ___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:5307
 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:5338
 __do_kmalloc_node mm/slub.c:5354 [inline]
 __kvmalloc_node_noprof+0x6e/0x910 mm/slub.c:6527
 kvmalloc_array_node_noprof include/linux/slab.h:1118 [inline]
 drm_gem_get_pages+0x166/0xa20 drivers/gpu/drm/drm_gem.c:647
 drm_gem_shmem_get_pages_locked+0x201/0x440 drivers/gpu/drm/drm_gem_shmem_helper.c:200
 drm_gem_shmem_mmap+0x193/0x460 drivers/gpu/drm/drm_gem_shmem_helper.c:646
 drm_gem_mmap_obj+0x187/0x4e0 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x384/0x640 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2283 [inline]
 mmap_file mm/internal.h:167 [inline]
 __mmap_new_file_vma mm/vma.c:2413 [inline]
 __mmap_new_vma mm/vma.c:2476 [inline]
 __mmap_region mm/vma.c:2669 [inline]
 mmap_region+0x18a8/0x2100 mm/vma.c:2739
 do_mmap+0xc45/0x10d0 mm/mmap.c:558
 vm_mmap_pgoff+0x2a6/0x4d0 mm/util.c:580
 ksys_mmap_pgoff+0x51f/0x760 mm/mmap.c:604
page last free pid 15828 tgid 15826 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1394 [inline]
 __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2900
 stack_depot_save_flags+0x436/0x860 lib/stackdepot.c:727
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x4f/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x3d5/0x6f0 mm/slub.c:5397
 kmalloc_noprof include/linux/slab.h:956 [inline]
 kzalloc_noprof include/linux/slab.h:1090 [inline]
 kobject_uevent_env+0x27c/0x8c0 lib/kobject_uevent.c:540
 device_del+0x73a/0x8e0 drivers/base/core.c:3896
 device_unregister drivers/base/core.c:3919 [inline]
 device_destroy+0xa6/0x160 drivers/base/core.c:4473
 drop_ref+0x100/0x360 drivers/hid/hidraw.c:349
 hidraw_disconnect+0x4f/0x60 drivers/hid/hidraw.c:642
 hid_disconnect drivers/hid/hid-core.c:2345 [inline]
 hid_hw_stop drivers/hid/hid-core.c:2390 [inline]
 hid_device_remove+0x1c2/0x370 drivers/hid/hid-core.c:2798
 device_remove drivers/base/dd.c:569 [inline]
 __device_release_driver drivers/base/dd.c:1274 [inline]
 device_release_driver_internal+0x46c/0x800 drivers/base/dd.c:1297
 bus_remove_device+0x34d/0x410 drivers/base/bus.c:579
 device_del+0x511/0x8e0 drivers/base/core.c:3878
 hid_remove_device drivers/hid/hid-core.c:2980 [inline]
 hid_destroy_device+0x6b/0x1b0 drivers/hid/hid-core.c:3002
 uhid_dev_destroy drivers/hid/uhid.c:586 [inline]
 uhid_char_release+0xc3/0x600 drivers/hid/uhid.c:662

Memory state around the buggy address:
 ffff888033e77300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888033e77380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888033e77400: 00 00 00 00 00 00 fe fe fe fe fe fe fe fe fe fe
                                     ^
 ffff888033e77480: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff888033e77500: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
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