[tor-commits] [tor/maint-0.4.1] Merge branch 'tor-github/pr/1050' into maint-0.4.1

[dgoulet at torproject.org]

commit ea14fb136c6c771320d7c4ff6beab05d1dbc73aa
Merge: ce89fe36c 5068ccab0
Author: David Goulet <dgoulet at torproject.org>
Date:   Tue Jun 11 11:29:46 2019 -0400

    Merge branch 'tor-github/pr/1050' into maint-0.4.1

 changes/ticket30686                  | 5 +++++
 src/lib/crypt_ops/crypto_rand_fast.c | 6 +++++-
 src/lib/malloc/map_anon.c            | 5 +++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --cc src/lib/crypt_ops/crypto_rand_fast.c
index c7f71a17c,d2ce1a542..e6ceb42cc
--- a/src/lib/crypt_ops/crypto_rand_fast.c
+++ b/src/lib/crypt_ops/crypto_rand_fast.c
@@@ -181,8 -181,12 +181,12 @@@ crypto_fast_rng_new_from_seed(const uin
  #else
    /* We decided above that noinherit would always do _something_. Assert here
     * that we were correct. */
-   tor_assert(inherit != INHERIT_RES_KEEP);
+   tor_assertf(inherit != INHERIT_RES_KEEP,
+               "We failed to create a non-inheritable memory region, even "
+               "though we believed such a failure to be impossible! This is "
+               "probably a bug in Tor support for your platform; please report "
+               "it.");
 -#endif
 +#endif /* defined(CHECK_PID) || ... */
    return result;
  }
  
diff --cc src/lib/malloc/map_anon.c
index 219bd706c,6afea713d..0f6a4150c
--- a/src/lib/malloc/map_anon.c
+++ b/src/lib/malloc/map_anon.c
@@@ -72,8 -68,13 +72,13 @@@
  #define FLAG_NOINHERIT MADV_DONTFORK
  #endif
  
 -#endif
 +#endif /* defined(HAVE_MINHERIT) || ... */
  
+ #if defined(HAVE_MINHERIT) && !defined(FLAG_ZERO) && !defined(FLAG_NOINHERIT)
+ #warn "minherit() is defined, but we couldn't find the right flag for it."
+ #warn "This is probably a bug in Tor's support for this platform."
+ #endif
+ 
  /**
   * Helper: try to prevent the <b>sz</b> bytes at <b>mem</b> from being swapped
   * to disk.  Return 0 on success or if the facility is not available on this