[gnutls-devel] GnuTLS | GnuTLS leaks file descriptors in child processes (#985)

Development of GNU's TLS library gnutls-devel at lists.gnutls.org
Sat May 9 19:22:14 CEST 2020

Remi Denis-Courmont commented:

The problem is another thread doing something unrelated to GnuTLS. GnuTLS leaks its file descriptor to forked children of other threads. The access rules on `gnutls_session_t` are irrelevant here.

The point really is that libraries running in potentially multithread programs must set close-on-exec atomically regardless of their own internal threading rules.

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