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BUG: KMSAN: uninit-value in filemap_map_folio_range mm/filemap.c:3666 [inline]
BUG: KMSAN: uninit-value in filemap_map_pages+0x14fe/0x3140 mm/filemap.c:3783
 filemap_map_folio_range mm/filemap.c:3666 [inline]
 filemap_map_pages+0x14fe/0x3140 mm/filemap.c:3783
 do_fault_around mm/memory.c:5531 [inline]
 do_read_fault mm/memory.c:5564 [inline]
 do_fault mm/memory.c:5707 [inline]
 do_pte_missing mm/memory.c:4234 [inline]
 handle_pte_fault mm/memory.c:6052 [inline]
 __handle_mm_fault mm/memory.c:6195 [inline]
 handle_mm_fault+0x8aac/0xdf70 mm/memory.c:6364
 faultin_page mm/gup.c:1144 [inline]
 __get_user_pages+0x2e0f/0x6180 mm/gup.c:1446
 populate_vma_page_range mm/gup.c:1880 [inline]
 __mm_populate+0x627/0xac0 mm/gup.c:1983
 mm_populate include/linux/mm.h:3367 [inline]
 vm_mmap_pgoff+0x578/0x770 mm/util.c:585
 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+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_frozen_pages_noprof+0x689/0xf00 mm/page_alloc.c:5171
 alloc_pages_mpol+0x328/0x860 mm/mempolicy.c:2416
 alloc_frozen_pages_noprof+0xf7/0x200 mm/mempolicy.c:2487
 alloc_slab_page mm/slub.c:2492 [inline]
 allocate_slab+0x24d/0x1220 mm/slub.c:2660
 new_slab mm/slub.c:2714 [inline]
 ___slab_alloc+0xff3/0x3470 mm/slub.c:3901
 __slab_alloc mm/slub.c:3992 [inline]
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 kmem_cache_alloc_noprof+0x91b/0xec0 mm/slub.c:4247
 __kernfs_new_node+0xe5/0xa70 fs/kernfs/dir.c:637
 kernfs_new_node+0x1f0/0x370 fs/kernfs/dir.c:713
 __kernfs_create_file+0xa2/0x520 fs/kernfs/file.c:1057
 sysfs_add_file_mode_ns+0x3a5/0x4d0 fs/sysfs/file.c:319
 create_files fs/sysfs/group.c:76 [inline]
 internal_create_group+0xb2d/0x1fb0 fs/sysfs/group.c:183
 internal_create_groups fs/sysfs/group.c:223 [inline]
 sysfs_create_groups+0x8c/0x210 fs/sysfs/group.c:249
 device_add_groups drivers/base/core.c:2836 [inline]
 device_add_attrs+0x28b/0x9b0 drivers/base/core.c:2911
 device_add+0xd4c/0x1c10 drivers/base/core.c:3643
 netdev_register_kobject+0x1c3/0x540 net/core/net-sysfs.c:2356
 register_netdevice+0x1b41/0x25d0 net/core/dev.c:11206
 veth_newlink+0x88f/0x1630 drivers/net/veth.c:1855
 rtnl_newlink_create+0x41c/0x1250 net/core/rtnetlink.c:3825
 __rtnl_newlink net/core/rtnetlink.c:3942 [inline]
 rtnl_newlink+0x2f13/0x3a90 net/core/rtnetlink.c:4057
 rtnetlink_rcv_msg+0x106c/0x14b0 net/core/rtnetlink.c:6946
 netlink_rcv_skb+0x54a/0x680 net/netlink/af_netlink.c:2552
 rtnetlink_rcv+0x35/0x40 net/core/rtnetlink.c:6973
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0xf01/0x12b0 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x10b3/0x1250 net/netlink/af_netlink.c:1896
 sock_sendmsg_nosec net/socket.c:714 [inline]
 __sock_sendmsg+0x333/0x3d0 net/socket.c:729
 __sys_sendto+0x593/0x720 net/socket.c:2231
 __do_sys_sendto net/socket.c:2238 [inline]
 __se_sys_sendto net/socket.c:2234 [inline]
 __x64_sys_sendto+0x130/0x200 net/socket.c:2234
 x64_sys_call+0x3924/0x3e30 arch/x86/include/generated/asm/syscalls_64.h:45
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xd9/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 9595 Comm: syz.4.1279 Not tainted syzkaller #0 PREEMPT(none) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
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