[Bug 240230] openssl segfaults if RUN_ONCE fails

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sat Aug 31 12:03:31 UTC 2019


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240230

            Bug ID: 240230
           Summary: openssl segfaults if RUN_ONCE fails
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: bugs at FreeBSD.org
          Reporter: andrew at tao11.riddles.org.uk

RAND_get_rand_method returns NULL if RUN_ONCE fails, but none of its callers
check for this condition, and so they immediately segfault from deferencing the
NULL.

(RUN_ONCE fails if libthr is not in the process, for example because openssl
was static-linked without it. This aspect of the issue is the subject of
another bug report; but if RUN_ONCE can legitimately fail for any other reason,
then this is an independent bug in openssl.)

Affects CURRENT and 12-STABLE, probably not 11 (not checked).

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