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BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_insert

write to 0xffff88812675a390 of 8 bytes by task 17361 on cpu 0:
 vma_interval_tree_insert+0xd7/0x220 mm/interval_tree.c:23
 __vma_link_file+0xca/0xf0 mm/mmap.c:629
 __vma_adjust+0x1ab/0x1190 mm/mmap.c:812
 vma_adjust include/linux/mm.h:2475 [inline]
 __split_vma+0x1fe/0x340 mm/mmap.c:2695
 __do_munmap+0x20d/0xb20 mm/mmap.c:2782
 __vm_munmap+0xa9/0x130 mm/mmap.c:2856
 vm_munmap+0x25/0x40 mm/mmap.c:2874
 elf_map+0x1b9/0x200 fs/binfmt_elf.c:379
 load_elf_interp fs/binfmt_elf.c:604 [inline]
 load_elf_binary+0x14bc/0x2b10 fs/binfmt_elf.c:1057
 search_binary_handler fs/exec.c:1718 [inline]
 search_binary_handler+0x11c/0x3f0 fs/exec.c:1695
 exec_binprm fs/exec.c:1761 [inline]
 __do_execve_file.isra.0+0xb53/0x1120 fs/exec.c:1881
 do_execveat_common fs/exec.c:1927 [inline]
 do_execve+0x39/0x50 fs/exec.c:1944
 call_usermodehelper_exec_async+0x394/0x3e0 kernel/umh.c:112
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:352

read to 0xffff88812675a320 of 200 bytes by task 17359 on cpu 1:
 vm_area_dup+0x71/0x110 kernel/fork.c:362
 __split_vma+0x83/0x340 mm/mmap.c:2666
 split_vma+0x69/0x90 mm/mmap.c:2724
 mprotect_fixup+0x45d/0x530 mm/mprotect.c:473
 do_mprotect_pkey+0x3da/0x640 mm/mprotect.c:613
 __do_sys_mprotect mm/mprotect.c:638 [inline]
 __se_sys_mprotect mm/mprotect.c:635 [inline]
 __x64_sys_mprotect+0x4d/0x60 mm/mprotect.c:635
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 17359 Comm: modprobe Not tainted 5.7.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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