openssl_init in multithreaded programs sorin.manolache at
Wed Jun 10 12:05:28 EDT 2015


I'm using a multithreaded program that performs krb5 calls.

I'm getting segfaults when krb5 calls 

openssl_init in pkinit_crypto_openssl.c has the following code:

static void
openssl_init() {
     static int did_init = 0;

     if (!did_init) {
         /* initialize openssl routines */

The static did_init is incremented _after_ the calls to OpenSSL. This 
enlarges the time interval between the test and the set of did_init. 
Several threads may slip through this time window and they cause the 
segfault when they call the OpenSSL functions concurrently.

Is this a bug in krb5? Or should I use the exclusion mechanisms of 
OpenSSL ( before 
calling any krb5 function?

Thank you,

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