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BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove

write to 0xffff88805be3c520 of 8 bytes by task 13920 on cpu 1:
 vma_interval_tree_augment_copy mm/interval_tree.c:23 [inline]
 __rb_erase_augmented include/linux/rbtree_augmented.h:247 [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+0x593/0x8e0 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+0x145/0x1f0 mm/memory.c:414
 exit_mmap+0x14d/0x2f0 mm/mmap.c:3151
 __mmput kernel/fork.c:1085 [inline]
 mmput+0xe2/0x260 kernel/fork.c:1106
 exit_mm kernel/exit.c:479 [inline]
 do_exit+0x644/0x1150 kernel/exit.c:782
 do_group_exit+0xae/0x1a0 kernel/exit.c:893
 __do_sys_exit_group kernel/exit.c:904 [inline]
 __se_sys_exit_group kernel/exit.c:902 [inline]
 __x64_sys_exit_group+0x2b/0x30 kernel/exit.c:902
 do_syscall_64+0xc7/0x3b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff88805be3c4b0 of 200 bytes by task 13925 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_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

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 13925 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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