================================================================== BUG: KCSAN: data-race in dput / select_collect write to 0xffff88803c8bdd80 of 4 bytes by task 8400 on cpu 0: d_lru_del fs/dcache.c:410 [inline] select_collect+0xaf/0x2b0 fs/dcache.c:1538 d_walk+0x298/0x4b0 fs/dcache.c:1359 shrink_dcache_parent+0x85/0x3f0 fs/dcache.c:1598 d_invalidate+0x6e/0x1a0 fs/dcache.c:1710 proc_invalidate_siblings_dcache+0x1e3/0x2d0 fs/proc/inode.c:150 proc_flush_pid+0x16/0x20 fs/proc/base.c:3325 release_task+0xa9f/0xb90 kernel/exit.c:222 wait_task_zombie kernel/exit.c:1107 [inline] wait_consider_task+0x104f/0x18e0 kernel/exit.c:1334 do_wait_thread kernel/exit.c:1397 [inline] do_wait+0x1b1/0x4e0 kernel/exit.c:1468 kernel_wait4+0x13c/0x1a0 kernel/exit.c:1630 __do_sys_wait4 kernel/exit.c:1658 [inline] __se_sys_wait4 kernel/exit.c:1654 [inline] __x64_sys_wait4+0x7a/0x100 kernel/exit.c:1654 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88803c8bdd80 of 4 bytes by task 8043 on cpu 1: fast_dput fs/dcache.c:747 [inline] dput+0x34/0x430 fs/dcache.c:873 proc_invalidate_siblings_dcache+0x1eb/0x2d0 fs/proc/inode.c:151 proc_flush_pid+0x16/0x20 fs/proc/base.c:3325 release_task+0xa9f/0xb90 kernel/exit.c:222 exit_notify kernel/exit.c:699 [inline] do_exit+0xe8a/0x15e0 kernel/exit.c:845 do_group_exit+0xce/0x180 kernel/exit.c:922 get_signal+0xf93/0x1510 kernel/signal.c:2781 arch_do_signal_or_restart+0x2a/0x270 arch/x86/kernel/signal.c:789 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x11a/0x1b0 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x45/0x80 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xae Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 8043 Comm: syz-executor.4 Tainted: G W 5.12.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================