| 1 | BASH PATCH REPORT |
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| 2 | ================= |
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| 3 | |
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| 4 | Bash-Release: 4.3 |
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| 5 | Patch-ID: bash43-009 |
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| 6 | |
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| 7 | Bug-Reported-by: Matthias Klose <doko@debian.org> |
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| 8 | Bug-Reference-ID: <53346FC8.6090005@debian.org> |
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| 9 | Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00171.html |
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| 10 | |
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| 11 | Bug-Description: |
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| 12 | |
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| 13 | There is a problem with unsigned sign extension when attempting to reallocate |
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| 14 | the input line when it is fewer than 3 characters long and there has been a |
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| 15 | history expansion. The sign extension causes the shell to not reallocate the |
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| 16 | line, which results in a segmentation fault when it writes past the end. |
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| 17 | |
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| 18 | Patch (apply with `patch -p0'): |
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| 19 | |
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| 20 | *** ../bash-4.3-patched/parse.y 2014-02-11 09:42:10.000000000 -0500 |
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| 21 | --- parse.y 2014-03-27 16:33:29.000000000 -0400 |
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| 22 | *************** |
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| 23 | *** 2425,2429 **** |
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| 24 | if (shell_input_line_terminator != EOF) |
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| 25 | { |
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| 26 | ! if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3) |
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| 27 | shell_input_line = (char *)xrealloc (shell_input_line, |
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| 28 | 1 + (shell_input_line_size += 2)); |
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| 29 | --- 2425,2429 ---- |
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| 30 | if (shell_input_line_terminator != EOF) |
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| 31 | { |
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| 32 | ! if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) |
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| 33 | shell_input_line = (char *)xrealloc (shell_input_line, |
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| 34 | 1 + (shell_input_line_size += 2)); |
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| 35 | *** ../bash-4.3-patched/y.tab.c 2014-03-28 11:17:06.000000000 -0400 |
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| 36 | --- y.tab.c 2014-04-07 11:48:31.000000000 -0400 |
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| 37 | *************** |
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| 38 | *** 4737,4741 **** |
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| 39 | if (shell_input_line_terminator != EOF) |
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| 40 | { |
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| 41 | ! if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3) |
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| 42 | shell_input_line = (char *)xrealloc (shell_input_line, |
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| 43 | 1 + (shell_input_line_size += 2)); |
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| 44 | --- 4737,4741 ---- |
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| 45 | if (shell_input_line_terminator != EOF) |
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| 46 | { |
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| 47 | ! if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) |
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| 48 | shell_input_line = (char *)xrealloc (shell_input_line, |
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| 49 | 1 + (shell_input_line_size += 2)); |
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| 50 | *** ../bash-4.3/patchlevel.h 2012-12-29 10:47:57.000000000 -0500 |
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| 51 | --- patchlevel.h 2014-03-20 20:01:28.000000000 -0400 |
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| 52 | *************** |
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| 53 | *** 26,30 **** |
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| 54 | looks for to find the patch level (for the sccs version string). */ |
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| 55 | |
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| 56 | ! #define PATCHLEVEL 8 |
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| 57 | |
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| 58 | #endif /* _PATCHLEVEL_H_ */ |
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| 59 | --- 26,30 ---- |
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| 60 | looks for to find the patch level (for the sccs version string). */ |
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| 61 | |
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| 62 | ! #define PATCHLEVEL 9 |
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| 63 | |
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| 64 | #endif /* _PATCHLEVEL_H_ */ |
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