=====================================================
BUG: KMSAN: uninit-value in cpa_flush arch/x86/mm/pat/set_memory.c:453 [inline]
BUG: KMSAN: uninit-value in change_page_attr_set_clr+0x1413/0x21a0 arch/x86/mm/pat/set_memory.c:2115
 cpa_flush arch/x86/mm/pat/set_memory.c:453 [inline]
 change_page_attr_set_clr+0x1413/0x21a0 arch/x86/mm/pat/set_memory.c:2115
 cpa_set_pages_array arch/x86/mm/pat/set_memory.c:2137 [inline]
 _set_pages_array+0x23d/0x4b0 arch/x86/mm/pat/set_memory.c:2521
 set_pages_array_wc+0x39/0x50 arch/x86/mm/pat/set_memory.c:2552
 drm_gem_shmem_get_pages_locked+0x3f7/0x4e0 drivers/gpu/drm/drm_gem_shmem_helper.c:214
 drm_gem_shmem_mmap+0x2b0/0x700 drivers/gpu/drm/drm_gem_shmem_helper.c:646
 drm_gem_shmem_object_mmap+0x36/0x50 include/drm/drm_gem_shmem_helper.h:277
 drm_gem_mmap_obj+0x210/0x7b0 drivers/gpu/drm/drm_gem.c:1167
 drm_gem_mmap+0x55b/0xb70 drivers/gpu/drm/drm_gem.c:1245
 vfs_mmap include/linux/fs.h:2405 [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:2670 [inline]
 mmap_region+0x3632/0x5020 mm/vma.c:2740
 do_mmap+0x17a8/0x1d70 mm/mmap.c:558
 vm_mmap_pgoff+0x40d/0x770 mm/util.c:581
 ksys_mmap_pgoff+0x51b/0x7c0 mm/mmap.c:604
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
 __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
 __x64_sys_mmap+0x19c/0x260 arch/x86/kernel/sys_x86_64.c:82
 x64_sys_call+0x18a7/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:10
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:4962 [inline]
 slab_alloc_node mm/slub.c:5265 [inline]
 __do_kmalloc_node mm/slub.c:5626 [inline]
 __kmalloc_noprof+0xabb/0x1b40 mm/slub.c:5639
 kmalloc_noprof include/linux/slab.h:961 [inline]
 memcg_init_list_lru_one mm/list_lru.c:410 [inline]
 memcg_list_lru_alloc+0x39a/0xcf0 mm/list_lru.c:543
 __memcg_slab_post_alloc_hook+0x489/0x1270 mm/memcontrol.c:3162
 memcg_slab_post_alloc_hook mm/slub.c:2322 [inline]
 slab_post_alloc_hook mm/slub.c:4966 [inline]
 slab_alloc_node mm/slub.c:5265 [inline]
 kmem_cache_alloc_lru_noprof+0xaa0/0x1640 mm/slub.c:5284
 xas_alloc lib/xarray.c:378 [inline]
 xas_expand lib/xarray.c:590 [inline]
 xas_create+0xb3b/0x27e0 lib/xarray.c:661
 xas_store+0xc4/0x2a30 lib/xarray.c:795
 __filemap_add_folio+0x106b/0x1960 mm/filemap.c:927
 filemap_add_folio+0x37f/0x6e0 mm/filemap.c:978
 __filemap_get_folio+0xcb9/0x1930 mm/filemap.c:2022
 grow_dev_folio fs/buffer.c:1050 [inline]
 grow_buffers fs/buffer.c:1116 [inline]
 __getblk_slow fs/buffer.c:1134 [inline]
 bdev_getblk+0x25a/0xad0 fs/buffer.c:1461
 __getblk include/linux/buffer_head.h:380 [inline]
 sb_getblk include/linux/buffer_head.h:386 [inline]
 __ext4_get_inode_loc+0x79f/0x1ad0 fs/ext4/inode.c:4837
 __ext4_get_inode_loc_noinmem fs/ext4/inode.c:4950 [inline]
 __ext4_iget+0x559/0x7090 fs/ext4/inode.c:5225
 __ext4_fill_super fs/ext4/super.c:5512 [inline]
 ext4_fill_super+0x9407/0xb010 fs/ext4/super.c:5736
 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1691
 get_tree_bdev+0x38/0x50 fs/super.c:1714
 ext4_get_tree+0x35/0x40 fs/ext4/super.c:5768
 vfs_get_tree+0xb3/0x5c0 fs/super.c:1751
 fc_mount fs/namespace.c:1208 [inline]
 do_new_mount_fc fs/namespace.c:3651 [inline]
 do_new_mount+0x839/0x15f0 fs/namespace.c:3727
 path_mount+0x747/0x1fb0 fs/namespace.c:4037
 do_mount fs/namespace.c:4050 [inline]
 __do_sys_mount fs/namespace.c:4238 [inline]
 __se_sys_mount+0x6f7/0x7e0 fs/namespace.c:4215
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4215
 x64_sys_call+0x3604/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 10612 Comm: syz.2.1363 Tainted: G        W           syzkaller #0 PREEMPT(none) 
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
=====================================================