================================================================== BUG: KCSAN: data-race in fifo_open / wait_for_partner read-write to 0xffff88813d83ec6c of 4 bytes by task 18893 on cpu 0: put_pipe_info fs/pipe.c:704 [inline] fifo_open+0x2a2/0x5d0 fs/pipe.c:1214 do_dentry_open+0x51a/0x8b0 fs/open.c:878 vfs_open+0x43/0x50 fs/open.c:1014 do_open fs/namei.c:3499 [inline] path_openat+0x1671/0x1ad0 fs/namei.c:3632 do_filp_open+0x105/0x220 fs/namei.c:3659 do_sys_openat2+0xb5/0x2a0 fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_open fs/open.c:1335 [inline] __se_sys_open fs/open.c:1331 [inline] __x64_sys_open+0xe2/0x110 fs/open.c:1331 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88813d83ec6c of 4 bytes by task 18888 on cpu 1: pipe_lock_nested fs/pipe.c:81 [inline] pipe_lock fs/pipe.c:90 [inline] wait_for_partner+0xe0/0x1d0 fs/pipe.c:1081 fifo_open+0x4c8/0x5d0 fs/pipe.c:1169 do_dentry_open+0x51a/0x8b0 fs/open.c:878 vfs_open+0x43/0x50 fs/open.c:1014 do_open fs/namei.c:3499 [inline] path_openat+0x1671/0x1ad0 fs/namei.c:3632 do_filp_open+0x105/0x220 fs/namei.c:3659 file_open_name+0xf2/0x120 fs/open.c:1256 acct_on kernel/acct.c:226 [inline] __do_sys_acct kernel/acct.c:305 [inline] __se_sys_acct+0xec/0x420 kernel/acct.c:292 __x64_sys_acct+0x1b/0x20 kernel/acct.c:292 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00000002 -> 0x00000001 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 18888 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-12567-g1612c382ffbd-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 ==================================================================