Fix prof_alloc_rollback().
Fix prof_alloc_rollback() to read tdata from thread-specific data rather
than dereferencing a potentially invalid tctx.
diff --git a/ChangeLog b/ChangeLog
index b5e10c4..fb376b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,8 @@
so this fix removes buggy code without loss of generality.
- Fix irallocx_prof_sample() to always allocate large regions, even when
alignment is non-zero.
+ - Fix prof_alloc_rollback() to read tdata from thread-specific data rather
+ than dereferencing a potentially invalid tctx.
* 4.0.1 (September 15, 2015)