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BASH PATCH REPORT
=================
Bash-Release: 5.3
Patch-ID: bash53-013
Bug-Reported-by: Florian Schmaus <flo@geekplace.eu>
Bug-Reference-ID:
Bug-Reference-URL: https://savannah.gnu.org/bugs/?67586
Bug-Description:
Comparing the value of a pointer returned from realloc/xrealloc to the
original pointer passed is technically undefined behavior, which matters
under some circumstances.
Patch (apply with `patch -p0'):
*** ../bash-5.3-patched/builtins/read.def Wed Jun 25 15:50:18 2025
--- builtins/read.def Thu Nov 20 15:10:20 2025
***************
*** 789,794 ****
x = (char *)xrealloc (input_string, size += 128);
! /* Only need to change unwind-protect if input_string changes */
if (x != input_string)
{
input_string = x;
--- 816,824 ----
x = (char *)xrealloc (input_string, size += 128);
! #if 0
! /* This is, in theory, undefined behavior, since input_string may
! have been freed. */
if (x != input_string)
+ #endif
{
input_string = x;
*** ../bash-5.3/patchlevel.h 2020-06-22 14:51:03.000000000 -0400
--- patchlevel.h 2020-10-01 11:01:28.000000000 -0400
***************
*** 26,30 ****
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 12
#endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
looks for to find the patch level (for the sccs version string). */
! #define PATCHLEVEL 13
#endif /* _PATCHLEVEL_H_ */
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