85 lines
2.3 KiB
Plaintext
85 lines
2.3 KiB
Plaintext
BASH PATCH REPORT
|
|
=================
|
|
|
|
Bash-Release: 4.4
|
|
Patch-ID: bash44-004
|
|
|
|
Bug-Reported-by: Christian Weisgerber <naddy@mips.inka.de>
|
|
Bug-Reference-ID: <20161101160302.GB54856@lorvorc.mips.inka.de>
|
|
Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2016-11/msg00004.html
|
|
|
|
Bug-Description:
|
|
|
|
There is a race condition that can result in bash referencing freed memory
|
|
when freeing data associated with the last process substitution.
|
|
|
|
Patch (apply with `patch -p0'):
|
|
|
|
*** ../bash-4.4/jobs.c 2016-08-23 16:38:44.000000000 -0400
|
|
--- jobs.c 2016-11-02 18:24:45.000000000 -0400
|
|
***************
|
|
*** 454,457 ****
|
|
--- 454,472 ----
|
|
}
|
|
|
|
+ void
|
|
+ discard_last_procsub_child ()
|
|
+ {
|
|
+ PROCESS *disposer;
|
|
+ sigset_t set, oset;
|
|
+
|
|
+ BLOCK_CHILD (set, oset);
|
|
+ disposer = last_procsub_child;
|
|
+ last_procsub_child = (PROCESS *)NULL;
|
|
+ UNBLOCK_CHILD (oset);
|
|
+
|
|
+ if (disposer)
|
|
+ discard_pipeline (disposer);
|
|
+ }
|
|
+
|
|
struct pipeline_saver *
|
|
alloc_pipeline_saver ()
|
|
*** ../bash-4.4/jobs.h 2016-04-27 10:35:51.000000000 -0400
|
|
--- jobs.h 2016-11-02 18:25:08.000000000 -0400
|
|
***************
|
|
*** 191,194 ****
|
|
--- 191,195 ----
|
|
extern void stop_making_children __P((void));
|
|
extern void cleanup_the_pipeline __P((void));
|
|
+ extern void discard_last_procsub_child __P((void));
|
|
extern void save_pipeline __P((int));
|
|
extern PROCESS *restore_pipeline __P((int));
|
|
*** ../bash-4.4/subst.c 2016-08-30 16:46:38.000000000 -0400
|
|
--- subst.c 2016-11-02 18:23:24.000000000 -0400
|
|
***************
|
|
*** 5809,5816 ****
|
|
#if defined (JOB_CONTROL)
|
|
if (last_procsub_child)
|
|
! {
|
|
! discard_pipeline (last_procsub_child);
|
|
! last_procsub_child = (PROCESS *)NULL;
|
|
! }
|
|
last_procsub_child = restore_pipeline (0);
|
|
#endif
|
|
--- 5834,5838 ----
|
|
#if defined (JOB_CONTROL)
|
|
if (last_procsub_child)
|
|
! discard_last_procsub_child ();
|
|
last_procsub_child = restore_pipeline (0);
|
|
#endif
|
|
*** ../bash-4.4/patchlevel.h 2016-06-22 14:51:03.000000000 -0400
|
|
--- patchlevel.h 2016-10-01 11:01:28.000000000 -0400
|
|
***************
|
|
*** 26,30 ****
|
|
looks for to find the patch level (for the sccs version string). */
|
|
|
|
! #define PATCHLEVEL 3
|
|
|
|
#endif /* _PATCHLEVEL_H_ */
|
|
--- 26,30 ----
|
|
looks for to find the patch level (for the sccs version string). */
|
|
|
|
! #define PATCHLEVEL 4
|
|
|
|
#endif /* _PATCHLEVEL_H_ */
|