[Bug libc/184] New: sighold() receives SIGSEGV when called with invalid signal

["alan dot johnston at gd-ais dot com" <sourceware-bugzilla at sources dot redhat dot com>]

The SourceForge Open POSIX test suite performs end case tests where sighold() 
is called with invalid signal numbers.  Instead of returning EINVAL, the 
process receives a SIGSEGV.

The problem occurs because sighold.c calls __sigaddset(), which is an unchecked 
sigaddset() call. Since the invocation of sighold() is using an invalid signal 
number, __sigaddset assuming the signal is valid, gets a memory reference error.

sighold.c should b call sigaddset(), not __sigaddset().

-- 
           Summary: sighold() receives SIGSEGV when called with invalid
                    signal
           Product: glibc
           Version: 2.3.2
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: gotom at debian dot or dot jp
        ReportedBy: alan dot johnston at gd-ais dot com
                CC: glibc-bugs at sources dot redhat dot com
  GCC host triplet: Linux Gentoo 2.6.3-rc3
GCC target triplet: Same as host


http://sources.redhat.com/bugzilla/show_bug.cgi?id=184

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