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BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove

write to 0xffff888124c7c058 of 8 bytes by task 9803 on cpu 0:
 __rb_erase_augmented include/linux/rbtree_augmented.h:218 [inline]
 rb_erase_augmented include/linux/rbtree_augmented.h:305 [inline]
 rb_erase_augmented_cached include/linux/rbtree_augmented.h:316 [inline]
 vma_interval_tree_remove+0x671/0x8a0 mm/interval_tree.c:23
 __vma_adjust+0x278/0x12a0 mm/mmap.c:860
 vma_adjust include/linux/mm.h:2271 [inline]
 __split_vma+0x208/0x350 mm/mmap.c:2707
 split_vma+0x73/0xa0 mm/mmap.c:2736
 mprotect_fixup+0x43f/0x510 mm/mprotect.c:413
 do_mprotect_pkey+0x3eb/0x660 mm/mprotect.c:553
 __do_sys_mprotect mm/mprotect.c:578 [inline]
 __se_sys_mprotect mm/mprotect.c:575 [inline]
 __x64_sys_mprotect+0x51/0x70 mm/mprotect.c:575
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888124c7c000 of 200 bytes by task 9799 on cpu 1:
 vm_area_dup+0x70/0xf0 kernel/fork.c:359
 __split_vma+0x88/0x350 mm/mmap.c:2678
 split_vma+0x73/0xa0 mm/mmap.c:2736
 mprotect_fixup+0x43f/0x510 mm/mprotect.c:413
 do_mprotect_pkey+0x3eb/0x660 mm/mprotect.c:553
 __do_sys_mprotect mm/mprotect.c:578 [inline]
 __se_sys_mprotect mm/mprotect.c:575 [inline]
 __x64_sys_mprotect+0x51/0x70 mm/mprotect.c:575
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9799 Comm: modprobe Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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