================================================================== BUG: KCSAN: data-race in put_pipe_info / wait_for_partner write to 0xffff8881397c4aec of 4 bytes by task 12819 on cpu 1: put_pipe_info+0x3d/0xe0 fs/pipe.c:688 fifo_open+0x342/0x6a0 fs/pipe.c:1196 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_creat fs/open.c:1277 [inline] __se_sys_creat fs/open.c:1271 [inline] __x64_sys_creat+0x62/0x80 fs/open.c:1271 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff8881397c4aec of 4 bytes by task 12833 on cpu 0: pipe_lock_nested fs/pipe.c:65 [inline] pipe_lock fs/pipe.c:74 [inline] wait_for_partner+0xe0/0x1d0 fs/pipe.c:1063 fifo_open+0x555/0x6a0 fs/pipe.c:1151 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 file_open_name+0xe1/0x100 fs/open.c:1132 acct_on kernel/acct.c:207 [inline] __do_sys_acct kernel/acct.c:286 [inline] __se_sys_acct+0xe7/0x410 kernel/acct.c:273 __x64_sys_acct+0x1b/0x20 kernel/acct.c:273 do_syscall_64+0x4a/0x90 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000002 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12833 Comm: syz-executor.1 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================