================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner read-write to 0xffff88815f75e1ec of 4 bytes by task 23606 on cpu 0: put_pipe_info fs/pipe.c:715 [inline] fifo_open+0x2a6/0x5e0 fs/pipe.c:1228 do_dentry_open+0x635/0xbd0 fs/open.c:948 vfs_open+0x4a/0x50 fs/open.c:1082 do_open fs/namei.c:3622 [inline] path_openat+0x1819/0x1d70 fs/namei.c:3779 do_filp_open+0xf6/0x200 fs/namei.c:3809 do_sys_openat2+0xab/0x110 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1463 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b read to 0xffff88815f75e1ec of 4 bytes by task 23599 on cpu 1: pipe_lock_nested fs/pipe.c:81 [inline] pipe_lock fs/pipe.c:90 [inline] wait_for_partner+0x105/0x1d0 fs/pipe.c:1095 fifo_open+0x483/0x5e0 fs/pipe.c:1162 do_dentry_open+0x635/0xbd0 fs/open.c:948 vfs_open+0x4a/0x50 fs/open.c:1082 do_open fs/namei.c:3622 [inline] path_openat+0x1819/0x1d70 fs/namei.c:3779 do_filp_open+0xf6/0x200 fs/namei.c:3809 do_sys_openat2+0xab/0x110 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __x64_sys_openat+0xf3/0x120 fs/open.c:1463 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b value changed: 0x00000002 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 23599 Comm: syz-executor.0 Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 ==================================================================