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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
CPU: 0 PID: 12357 Comm: syz-executor.2 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:200
 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
RIP: 0033:0x4665e9
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f18ceebb188 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9
RDX: 00000000200013c0 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000056bf80
R13: 0000000000a9fb1f R14: 00007f18ceebb300 R15: 0000000000022000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:120 [inline]
 kmsan_internal_poison_memory+0x66/0xd0 mm/kmsan/kmsan.c:103
 kmsan_kmalloc_large+0x7b/0xd0 mm/kmsan/kmsan_hooks.c:119
 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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