================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner write to 0xffff88812dfbf42c of 4 bytes by task 12863 on cpu 0: fifo_open+0xab/0x6a0 fs/pipe.c:1086 do_dentry_open+0x53e/0x830 fs/open.c:826 vfs_open+0x43/0x50 fs/open.c:940 do_open fs/namei.c:3361 [inline] path_openat+0x184e/0x20b0 fs/namei.c:3494 do_filp_open+0xd9/0x1f0 fs/namei.c:3521 do_sys_openat2+0xa3/0x250 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1207 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff88812dfbf42c of 4 bytes by task 12846 on cpu 1: pipe_unlock fs/pipe.c:80 [inline] wait_for_partner+0x98/0x1d0 fs/pipe.c:1060 fifo_open+0x503/0x6a0 fs/pipe.c:1130 do_dentry_open+0x53e/0x830 fs/open.c:826 vfs_open+0x43/0x50 fs/open.c:940 do_open fs/namei.c:3361 [inline] path_openat+0x184e/0x20b0 fs/namei.c:3494 do_filp_open+0xd9/0x1f0 fs/namei.c:3521 do_sys_openat2+0xa3/0x250 fs/open.c:1187 do_sys_open fs/open.c:1203 [inline] __do_sys_open fs/open.c:1211 [inline] __se_sys_open fs/open.c:1207 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1207 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000001 -> 0x00000002 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 12846 Comm: syz-executor.1 Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================