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BUG: KMSAN: uninit-value in page_zonenum include/linux/mm.h:1127 [inline]
BUG: KMSAN: uninit-value in is_zone_movable_page include/linux/mm.h:1146 [inline]
BUG: KMSAN: uninit-value in is_pinnable_page include/linux/mm.h:1562 [inline]
BUG: KMSAN: uninit-value in try_grab_compound_head+0x638/0x1070 mm/gup.c:94
 page_zonenum include/linux/mm.h:1127 [inline]
 is_zone_movable_page include/linux/mm.h:1146 [inline]
 is_pinnable_page include/linux/mm.h:1562 [inline]
 try_grab_compound_head+0x638/0x1070 mm/gup.c:94
 follow_hugetlb_page+0x2478/0x2f60 mm/hugetlb.c:5248
 __get_user_pages+0x24c6/0x2ee0 mm/gup.c:1098
 __get_user_pages_locked mm/gup.c:1313 [inline]
 __gup_longterm_locked+0x3b6/0x6c0 mm/gup.c:1706
 pin_user_pages+0x17f/0x1d0 mm/gup.c:2861
 io_sqe_buffer_register+0x41a/0x2670 fs/io_uring.c:8301
 io_sqe_buffers_register+0xa65/0x1d20 fs/io_uring.c:8432
 __io_uring_register fs/io_uring.c:10033 [inline]
 __do_sys_io_uring_register+0x577/0x5090 fs/io_uring.c:10146
 __se_sys_io_uring_register fs/io_uring.c:10126 [inline]
 __x64_sys_io_uring_register+0x11d/0x160 fs/io_uring.c:10126
 do_syscall_64+0xb3/0x180 arch/x86/entry/common.c:53
 entry_SYSCALL_64_after_hwframe+0x44/0xae

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/core.c:78 [inline]
 kmsan_internal_poison_memory+0x56/0xc0 mm/kmsan/core.c:63
 kmsan_kmalloc_large+0xe2/0x150 mm/kmsan/hooks.c:118
 kmalloc_large_node_hook mm/slub.c:1541 [inline]
 kmalloc_large_node+0x299/0x2e0 mm/slub.c:4094
 __kmalloc_node+0xb92/0x1440 mm/slub.c:4103
 kmalloc_node include/linux/slab.h:579 [inline]
 kvmalloc_node+0x201/0x3d0 mm/util.c:587
 kvmalloc include/linux/mm.h:804 [inline]
 kvmalloc_array include/linux/mm.h:822 [inline]
 io_sqe_buffer_register+0x1e4/0x2670 fs/io_uring.c:8286
 io_sqe_buffers_register+0xa65/0x1d20 fs/io_uring.c:8432
 __io_uring_register fs/io_uring.c:10033 [inline]
 __do_sys_io_uring_register+0x577/0x5090 fs/io_uring.c:10146
 __se_sys_io_uring_register fs/io_uring.c:10126 [inline]
 __x64_sys_io_uring_register+0x11d/0x160 fs/io_uring.c:10126
 do_syscall_64+0xb3/0x180 arch/x86/entry/common.c:53
 entry_SYSCALL_64_after_hwframe+0x44/0xae
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