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BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove

write to 0xffff888121e73e80 of 8 bytes by task 10696 on cpu 1:
 vma_interval_tree_augment_compute_max mm/interval_tree.c:23 [inline]
 vma_interval_tree_augment_propagate mm/interval_tree.c:23 [inline]
 __rb_erase_augmented include/linux/rbtree_augmented.h:295 [inline]
 rb_erase_augmented include/linux/rbtree_augmented.h:303 [inline]
 rb_erase_augmented_cached include/linux/rbtree_augmented.h:314 [inline]
 vma_interval_tree_remove+0x495/0x8e0 mm/interval_tree.c:23
 __remove_shared_vm_struct+0xa4/0xc0 mm/mmap.c:151
 unlink_file_vma+0x65/0x80 mm/mmap.c:166
 free_pgtables+0xb8/0x1f0 mm/memory.c:400
 unmap_region+0x1d9/0x230 mm/mmap.c:2614
 __do_munmap+0x62e/0xb20 mm/mmap.c:2833
 __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 fs/exec.c:1944 [inline]
 __do_sys_execve fs/exec.c:2020 [inline]
 __se_sys_execve fs/exec.c:2015 [inline]
 __x64_sys_execve+0x5e/0x70 fs/exec.c:2015
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888121e73e10 of 200 bytes by task 10697 on cpu 0:
 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: 0 PID: 10697 Comm: grep 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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