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BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_insert

write to 0xffff8881200f0510 of 8 bytes by task 10206 on cpu 1:
 rb_link_node include/linux/rbtree.h:75 [inline]
 vma_interval_tree_insert+0x15d/0x220 mm/interval_tree.c:23
 __vma_link_file+0xca/0xf0 mm/mmap.c:629
 vma_link+0x97/0x110 mm/mmap.c:655
 mmap_region+0x8ba/0xdd0 mm/mmap.c:1795
 do_mmap+0x717/0xc20 mm/mmap.c:1545
 do_mmap_pgoff include/linux/mm.h:2553 [inline]
 vm_mmap_pgoff+0x12f/0x190 mm/util.c:506
 vm_mmap+0x9a/0xd0 mm/util.c:525
 elf_map+0xd0/0x200 fs/binfmt_elf.c:381
 load_elf_binary+0x87d/0x2b10 fs/binfmt_elf.c:983
 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 0xffff8881200f04b0 of 200 bytes by task 10207 on cpu 0:
 vm_area_dup+0x71/0x110 kernel/fork.c:362
 __split_vma+0x83/0x340 mm/mmap.c:2666
 __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_binary+0x87d/0x2b10 fs/binfmt_elf.c:983
 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

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 10207 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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