================================================================== BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove read to 0xffff8881265cc000 of 200 bytes by task 11638 on cpu 0: 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+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/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8881265cc070 of 8 bytes by task 11637 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+0x58b/0x8b0 mm/interval_tree.c:23 __remove_shared_vm_struct+0xad/0xd0 mm/mmap.c:154 unlink_file_vma+0x69/0x90 mm/mmap.c:169 free_pgtables+0x14f/0x200 mm/memory.c:414 exit_mmap+0x151/0x300 mm/mmap.c:3141 __mmput kernel/fork.c:1082 [inline] mmput+0xea/0x280 kernel/fork.c:1103 exit_mm kernel/exit.c:485 [inline] do_exit+0x4ac/0x18c0 kernel/exit.c:784 do_group_exit+0xb4/0x1c0 kernel/exit.c:895 __do_sys_exit_group kernel/exit.c:906 [inline] __se_sys_exit_group kernel/exit.c:904 [inline] __x64_sys_exit_group+0x2e/0x30 kernel/exit.c:904 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: 1 PID: 11637 Comm: blkid Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================