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Cygwin: Fix cygheap corruption caused by cloned atomic buffer

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The fhandler_base_overlapped::copyto clears atomic_write_buf on the
clone, but none of the derived classes were doing this.  This allowed
the destructor to double-free the buffer and corrupt cygheap.
Clear atomic_write_buf in copyto of all derived classes.
This commit is contained in:
David McFarland
2018-10-28 16:22:44 -03:00
committed by Corinna Vinschen
parent 08eab6396f
commit af85fdd73f
2 changed files with 5 additions and 0 deletions
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winsup/cygwin/release/2.11.2
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@@ -11,3 +11,6 @@ Bug Fixes
- Return ESPIPE rather than EINVAL from lseek on a fifo.
Addresses: https://cygwin.com/ml/cygwin/2018-10/msg00019.html
- Fix a memory corruption when using pipes or FIFOs
Addresses: https://cygwin.com/ml/cygwin-patches/2018-q4/msg00000.html