/usr/src/gcc-5/debian/patches/libffi-race-condition.diff is in gcc-5-source 5.5.0-12ubuntu1.
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From: =?UTF-8?q?Stefan=20B=C3=BChler?= <buehler@cert.uni-stuttgart.de>
Date: Wed, 7 Sep 2016 15:49:48 +0200
Subject: [PATCH 1/2] dlmmap_locked always needs locking as it always modifies
execsize
---
src/closures.c | 13 ++++---------
1 file changed, 4 insertions(+), 9 deletions(-)
--- a/src/libffi/src/closures.c
+++ b/src/libffi/src/closures.c
@@ -568,16 +568,11 @@
MREMAP_DUP and prot at this point. */
}
- if (execsize == 0 || execfd == -1)
- {
- pthread_mutex_lock (&open_temp_exec_file_mutex);
- ptr = dlmmap_locked (start, length, prot, flags, offset);
- pthread_mutex_unlock (&open_temp_exec_file_mutex);
+ pthread_mutex_lock (&open_temp_exec_file_mutex);
+ ptr = dlmmap_locked (start, length, prot, flags, offset);
+ pthread_mutex_unlock (&open_temp_exec_file_mutex);
- return ptr;
- }
-
- return dlmmap_locked (start, length, prot, flags, offset);
+ return ptr;
}
/* Release memory at the given address, as well as the corresponding
|