================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner read-write to 0xffff888135c6cf70 of 4 bytes by task 2126 on cpu 0: put_pipe_info fs/pipe.c:688 [inline] fifo_open+0x2a2/0x5d0 fs/pipe.c:1196 do_dentry_open+0x520/0x870 fs/open.c:817 vfs_open+0x43/0x50 fs/open.c:931 do_open fs/namei.c:3252 [inline] path_openat+0x1844/0x20a0 fs/namei.c:3369 do_filp_open+0xbd/0x1d0 fs/namei.c:3396 do_sys_openat2+0xa3/0x240 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1252 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff888135c6cf70 of 4 bytes by task 2130 on cpu 1: pipe_lock_nested fs/pipe.c:65 [inline] pipe_lock fs/pipe.c:74 [inline] wait_for_partner+0xdd/0x1a0 fs/pipe.c:1063 fifo_open+0x4c8/0x5d0 fs/pipe.c:1151 do_dentry_open+0x520/0x870 fs/open.c:817 vfs_open+0x43/0x50 fs/open.c:931 do_open fs/namei.c:3252 [inline] path_openat+0x1844/0x20a0 fs/namei.c:3369 do_filp_open+0xbd/0x1d0 fs/namei.c:3396 do_sys_openat2+0xa3/0x240 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_creat fs/open.c:1258 [inline] __se_sys_creat fs/open.c:1252 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1252 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 2130 Comm: syz-executor.2 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================