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BUG: KCSAN: data-race in vmalloc_info_show / vmalloc_info_show

read-write to 0xffff888100fbdd90 of 4 bytes by task 8589 on cpu 0:
 show_numa_info mm/vmalloc.c:4837 [inline]
 vmalloc_info_show+0x44d/0x760 mm/vmalloc.c:4919
 seq_read_iter+0x2d7/0x940 fs/seq_file.c:230
 proc_reg_read_iter+0x11e/0x190 fs/proc/inode.c:299
 call_read_iter include/linux/fs.h:2104 [inline]
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x5bc/0x6b0 fs/read_write.c:476
 ksys_read+0xeb/0x1b0 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:627
 x64_sys_call+0x27ad/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

read-write to 0xffff888100fbdd90 of 4 bytes by task 8587 on cpu 1:
 show_numa_info mm/vmalloc.c:4837 [inline]
 vmalloc_info_show+0x44d/0x760 mm/vmalloc.c:4919
 seq_read_iter+0x2d7/0x940 fs/seq_file.c:230
 proc_reg_read_iter+0x11e/0x190 fs/proc/inode.c:299
 call_read_iter include/linux/fs.h:2104 [inline]
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x5bc/0x6b0 fs/read_write.c:476
 ksys_read+0xeb/0x1b0 fs/read_write.c:619
 __do_sys_read fs/read_write.c:629 [inline]
 __se_sys_read fs/read_write.c:627 [inline]
 __x64_sys_read+0x42/0x50 fs/read_write.c:627
 x64_sys_call+0x27ad/0x2d30 arch/x86/include/generated/asm/syscalls_64.h:1
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1d0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

value changed: 0x00000066 -> 0x00000004

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 8587 Comm: syz-executor.0 Tainted: G        W          6.9.0-rc4-syzkaller-00031-g96fca68c4fbf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
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