epoll_pwait syscall fails when sigmask argument is specified

[anjalirai-intel]

Description of the problem

epoll_pwait unable to block signal when sigmask is specified
epoll_pwait(2) with sigmask argument allows the caller to safely wait until either a file descriptor becomes ready or the timeout expires.

Steps to reproduce

Run LTP Test epoll_pwait01

Expected results

epoll_pwait01 1 TPASS : epoll_pwait(sigmask) blocked signal
epoll_pwait01 0 TINFO : Child process returned TPASS
epoll_pwait01 2 TPASS : epoll_wait() failed as expected: TEST_ERRNO=EINTR(4): Interrupted system call
epoll_pwait01 0 TINFO : Child process returned TPASS

Actual results

Result:
epoll_pwait01 1 TFAIL : epoll_pwait() failed: TEST_ERRNO=EINTR(4): Interrupted system call
epoll_pwait01 0 TINFO : Child process returned TPASS
epoll_pwait01 2 TPASS : epoll_wait() failed as expected: TEST_ERRNO=EINTR(4): Interrupted system call
epoll_pwait01 0 TINFO : Child process returned TPASS

Labels

P0, bug