================================================================== BUG: KCSAN: data-race in vm_area_dup / vma_interval_tree_remove write to 0xffff8881258f1520 of 8 bytes by task 8303 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 exec_mmap fs/exec.c:1047 [inline] flush_old_exec+0x5ea/0xf60 fs/exec.c:1280 load_elf_binary+0x61b/0x2ef0 fs/binfmt_elf.c:846 search_binary_handler fs/exec.c:1658 [inline] search_binary_handler+0x127/0x420 fs/exec.c:1635 exec_binprm fs/exec.c:1701 [inline] __do_execve_file.isra.0+0xb6a/0x1140 fs/exec.c:1821 do_execveat_common fs/exec.c:1867 [inline] do_execve fs/exec.c:1884 [inline] __do_sys_execve fs/exec.c:1960 [inline] __se_sys_execve fs/exec.c:1955 [inline] __x64_sys_execve+0x62/0x80 fs/exec.c:1955 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881258f14b0 of 200 bytes by task 7850 on cpu 0: vm_area_dup+0x70/0xf0 kernel/fork.c:362 dup_mmap kernel/fork.c:544 [inline] dup_mm+0x330/0xba0 kernel/fork.c:1360 copy_mm kernel/fork.c:1416 [inline] copy_process+0x3138/0x3c40 kernel/fork.c:2072 _do_fork+0xfe/0x7a0 kernel/fork.c:2421 __do_sys_clone kernel/fork.c:2576 [inline] __se_sys_clone kernel/fork.c:2557 [inline] __x64_sys_clone+0x130/0x170 kernel/fork.c:2557 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: 7850 Comm: udevd Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================