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- BASH PATCH REPORT
- =================
- Bash-Release: 4.3
- Patch-ID: bash43-009
- Bug-Reported-by: Matthias Klose <doko@debian.org>
- Bug-Reference-ID: <53346FC8.6090005@debian.org>
- Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00171.html
- Bug-Description:
- There is a problem with unsigned sign extension when attempting to reallocate
- the input line when it is fewer than 3 characters long and there has been a
- history expansion. The sign extension causes the shell to not reallocate the
- line, which results in a segmentation fault when it writes past the end.
- Patch (apply with `patch -p0'):
- --- a/parse.y
- +++ b/parse.y
- @@ -2424,7 +2424,7 @@ shell_getc (remove_quoted_newline)
- not already end in an EOF character. */
- if (shell_input_line_terminator != EOF)
- {
- - if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3)
- + if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size))
- shell_input_line = (char *)xrealloc (shell_input_line,
- 1 + (shell_input_line_size += 2));
-
- --- a/y.tab.c
- +++ b/y.tab.c
- @@ -4736,7 +4736,7 @@ shell_getc (remove_quoted_newline)
- not already end in an EOF character. */
- if (shell_input_line_terminator != EOF)
- {
- - if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3)
- + if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size))
- shell_input_line = (char *)xrealloc (shell_input_line,
- 1 + (shell_input_line_size += 2));
-
- --- a/patchlevel.h
- +++ b/patchlevel.h
- @@ -25,6 +25,6 @@
- regexp `^#define[ ]*PATCHLEVEL', since that's what support/mkversion.sh
- looks for to find the patch level (for the sccs version string). */
-
- -#define PATCHLEVEL 8
- +#define PATCHLEVEL 9
-
- #endif /* _PATCHLEVEL_H_ */
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