==================================================================
BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove

read to 0xffff888122dd3bb8 of 200 bytes by task 8490 on cpu 0:
 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

write to 0xffff888122dd3c28 of 8 bytes by task 8491 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:297 [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+0x49c/0x8a0 mm/interval_tree.c:23
 __vma_adjust+0x278/0x12a0 mm/mmap.c:860
 vma_adjust include/linux/mm.h:2276 [inline]
 __split_vma+0x338/0x350 mm/mmap.c:2704
 split_vma+0x73/0xa0 mm/mmap.c:2736
 mprotect_fixup+0x3e8/0x510 mm/mprotect.c:407
 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: 8491 Comm: blkid Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
==================================================================