================================================================== BUG: KCSAN: data-race in __rb_rotate_set_parents / vm_area_dup read to 0xffff8881221d1258 of 200 bytes by task 13445 on cpu 1: vm_area_dup+0x70/0xf0 kernel/fork.c:362 __split_vma+0x88/0x350 mm/mmap.c:2656 split_vma+0x73/0xa0 mm/mmap.c:2714 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8881221d12b0 of 8 bytes by task 13444 on cpu 0: __rb_rotate_set_parents+0x4d/0xf0 lib/rbtree.c:79 __rb_insert lib/rbtree.c:215 [inline] __rb_insert_augmented+0x109/0x370 lib/rbtree.c:459 rb_insert_augmented include/linux/rbtree_augmented.h:50 [inline] rb_insert_augmented_cached include/linux/rbtree_augmented.h:60 [inline] vma_interval_tree_insert+0x196/0x230 mm/interval_tree.c:23 __vma_link_file+0xd9/0x110 mm/mmap.c:634 __vma_adjust+0x1ac/0x11d0 mm/mmap.c:817 vma_adjust include/linux/mm.h:2261 [inline] __split_vma+0x338/0x350 mm/mmap.c:2682 split_vma+0x73/0xa0 mm/mmap.c:2714 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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 13444 Comm: blkid Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================