================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner write to 0xffff8880b5554370 of 4 bytes by task 12574 on cpu 1: fifo_open+0xb6/0x680 fs/pipe.c:1086 do_dentry_open+0x52d/0x890 fs/open.c:817 vfs_open+0x43/0x50 fs/open.c:931 do_open fs/namei.c:3251 [inline] path_openat+0x1844/0x20a0 fs/namei.c:3368 do_filp_open+0xbd/0x1d0 fs/namei.c:3395 do_sys_openat2+0x33b/0x500 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_open fs/open.c:1192 [inline] __se_sys_open fs/open.c:1188 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1188 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8880b5554370 of 4 bytes by task 12567 on cpu 0: pipe_unlock fs/pipe.c:80 [inline] wait_for_partner+0xac/0x1a0 fs/pipe.c:1060 fifo_open+0x500/0x680 fs/pipe.c:1130 do_dentry_open+0x52d/0x890 fs/open.c:817 vfs_open+0x43/0x50 fs/open.c:931 do_open fs/namei.c:3251 [inline] path_openat+0x1844/0x20a0 fs/namei.c:3368 do_filp_open+0xbd/0x1d0 fs/namei.c:3395 do_sys_openat2+0x33b/0x500 fs/open.c:1168 do_sys_open fs/open.c:1184 [inline] __do_sys_openat fs/open.c:1200 [inline] __se_sys_openat fs/open.c:1195 [inline] __x64_sys_openat+0xef/0x110 fs/open.c:1195 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: 0 PID: 12567 Comm: syz-executor.2 Not tainted 5.9.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================