================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner write to 0xffff8881396a3c6c of 4 bytes by task 23343 on cpu 0: fifo_open+0xab/0x6a0 fs/pipe.c:1100 do_dentry_open+0x52c/0x860 fs/open.c:822 vfs_open+0x43/0x50 fs/open.c:945 do_open fs/namei.c:3428 [inline] path_openat+0x17c3/0x1ec0 fs/namei.c:3561 do_filp_open+0x105/0x220 fs/namei.c:3588 do_sys_openat2+0xb5/0x2b0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_creat fs/open.c:1290 [inline] __se_sys_creat fs/open.c:1284 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1284 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881396a3c6c of 4 bytes by task 23322 on cpu 1: pipe_lock_nested fs/pipe.c:80 [inline] pipe_lock fs/pipe.c:89 [inline] wait_for_partner+0xe0/0x1d0 fs/pipe.c:1077 fifo_open+0x503/0x6a0 fs/pipe.c:1144 do_dentry_open+0x52c/0x860 fs/open.c:822 vfs_open+0x43/0x50 fs/open.c:945 do_open fs/namei.c:3428 [inline] path_openat+0x17c3/0x1ec0 fs/namei.c:3561 do_filp_open+0x105/0x220 fs/namei.c:3588 do_sys_openat2+0xb5/0x2b0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_open fs/open.c:1224 [inline] __se_sys_open fs/open.c:1220 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1220 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000001 -> 0x00000002 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23322 Comm: syz-executor.5 Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================