================================================================== BUG: KCSAN: data-race in alloc_empty_file / percpu_counter_add_batch write to 0xffffffff85a08588 of 8 bytes by task 25120 on cpu 0: percpu_counter_add_batch+0xbc/0x140 lib/percpu_counter.c:91 percpu_counter_add include/linux/percpu_counter.h:55 [inline] percpu_counter_dec include/linux/percpu_counter.h:184 [inline] file_free fs/file_table.c:57 [inline] __fput+0x33c/0x4f0 fs/file_table.c:298 ____fput+0x1b/0x30 fs/file_table.c:313 task_work_run+0xf5/0x130 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x6da/0x1880 kernel/exit.c:801 do_group_exit+0xae/0x1a0 kernel/exit.c:899 __do_sys_exit_group kernel/exit.c:910 [inline] __se_sys_exit_group kernel/exit.c:908 [inline] __x64_sys_exit_group+0x2b/0x30 kernel/exit.c:908 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff85a08588 of 8 bytes by task 8075 on cpu 1: get_nr_files fs/file_table.c:66 [inline] alloc_empty_file+0x29/0x180 fs/file_table.c:142 path_openat+0x72/0x2f70 fs/namei.c:3596 do_filp_open+0x11e/0x1b0 fs/namei.c:3637 do_sys_openat2+0x4f5/0x620 fs/open.c:1149 do_sys_open+0xa2/0x110 fs/open.c:1165 ksys_open include/linux/syscalls.h:1386 [inline] __do_sys_open fs/open.c:1171 [inline] __se_sys_open fs/open.c:1169 [inline] __x64_sys_open+0x50/0x60 fs/open.c:1169 do_syscall_64+0xc7/0x390 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8075 Comm: udevd Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================