Bug 1001187

Description of problem:
anaconda installs a SIGSEGV signal handler, doSegvHandler(), which calls printf(), free(), and exit(), none of which are on the list of signal-safe functions:

POSIX:
2.4 Signal Concepts
2.4.3 Signal Actions
http://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html#tag_02_04_03

SIGNAL(7)
http://man7.org/linux/man-pages/man7/signal.7.html

Version-Release number of selected component (if applicable):
anaconda-20.8-1

How reproducible:


Steps to Reproduce:
1.
2.
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Actual results:


Expected results:


Additional info:
See also: Bug 983319, Comment 24.

For reference:
$ less -N anaconda-20.8-1/pyanaconda/isys/isys.c
...
    219 static PyObject * doSegvHandler(PyObject *s, PyObject *args) {
    220     void *array[20];
    221     size_t size;
    222     char **strings;
    223     size_t i;
    224 
    225     signal(SIGSEGV, SIG_DFL); /* back to default */
    226     
    227     size = backtrace (array, 20);
    228     strings = backtrace_symbols (array, size);
    229     
    230     printf ("Anaconda received SIGSEGV!.  Backtrace:\n");
    231     for (i = 0; i < size; i++)
    232         printf ("%s\n", strings[i]);
    233      
    234     free (strings);
    235     exit(1);
    236 }
...