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+ BASH PATCH REPORT
+ =================
+
+Bash-Release: 4.2
+Patch-ID: bash42-043
+
+Bug-Reported-by: konsolebox <konsolebox@gmail.com>
+Bug-Reference-ID: <CAJnmqwZuGKLgMsMwxRK4LL+2NN+HgvmKzrnode99QBGrcgX1Lw@mail.gmail.com>
+Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2013-01/msg00138.html
+
+Bug-Description:
+
+When SIGCHLD is trapped, and a SIGCHLD trap handler runs when a pending
+`read -t' invocation times out and generates SIGALRM, bash can crash with
+a segmentation fault.
+
+Patch (apply with `patch -p0'):
+
+*** ../bash-4.2-patched/builtins/read.def 2012-10-31 21:22:51.000517000 -0400
+--- builtins/read.def 2013-01-25 10:28:16.000038000 -0500
+***************
+*** 386,393 ****
+ /* Tricky. The top of the unwind-protect stack is the free of
+ input_string. We want to run all the rest and use input_string,
+! so we have to remove it from the stack. */
+! remove_unwind_protect ();
+! run_unwind_frame ("read_builtin");
+ input_string[i] = '\0'; /* make sure it's terminated */
+ retval = 128+SIGALRM;
+ goto assign_vars;
+--- 386,403 ----
+ /* Tricky. The top of the unwind-protect stack is the free of
+ input_string. We want to run all the rest and use input_string,
+! so we have to save input_string temporarily, run the unwind-
+! protects, then restore input_string so we can use it later. */
+!
+ input_string[i] = '\0'; /* make sure it's terminated */
++ if (i == 0)
++ {
++ t = (char *)xmalloc (1);
++ t[0] = 0;
++ }
++ else
++ t = savestring (input_string);
++
++ run_unwind_frame ("read_builtin");
++ input_string = t;
+ retval = 128+SIGALRM;
+ goto assign_vars;
+
+*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
+--- patchlevel.h Thu Feb 24 21:41:34 2011
+***************
+*** 26,30 ****
+ looks for to find the patch level (for the sccs version string). */
+
+! #define PATCHLEVEL 42
+
+ #endif /* _PATCHLEVEL_H_ */
+--- 26,30 ----
+ looks for to find the patch level (for the sccs version string). */
+
+! #define PATCHLEVEL 43
+
+ #endif /* _PATCHLEVEL_H_ */