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56ba7d19 MT |
1 | BASH PATCH REPORT |
2 | ================= | |
3 | ||
4 | Bash-Release: 4.3 | |
5 | Patch-ID: bash43-009 | |
6 | ||
7 | Bug-Reported-by: Matthias Klose <doko@debian.org> | |
8 | Bug-Reference-ID: <53346FC8.6090005@debian.org> | |
9 | Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00171.html | |
10 | ||
11 | Bug-Description: | |
12 | ||
13 | There is a problem with unsigned sign extension when attempting to reallocate | |
14 | the input line when it is fewer than 3 characters long and there has been a | |
15 | history expansion. The sign extension causes the shell to not reallocate the | |
16 | line, which results in a segmentation fault when it writes past the end. | |
17 | ||
18 | Patch (apply with `patch -p0'): | |
19 | ||
20 | *** ../bash-4.3-patched/parse.y 2014-02-11 09:42:10.000000000 -0500 | |
21 | --- parse.y 2014-03-27 16:33:29.000000000 -0400 | |
22 | *************** | |
23 | *** 2425,2429 **** | |
24 | if (shell_input_line_terminator != EOF) | |
25 | { | |
26 | ! if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3) | |
27 | shell_input_line = (char *)xrealloc (shell_input_line, | |
28 | 1 + (shell_input_line_size += 2)); | |
29 | --- 2425,2429 ---- | |
30 | if (shell_input_line_terminator != EOF) | |
31 | { | |
32 | ! if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) | |
33 | shell_input_line = (char *)xrealloc (shell_input_line, | |
34 | 1 + (shell_input_line_size += 2)); | |
35 | *** ../bash-4.3-patched/y.tab.c 2014-03-28 11:17:06.000000000 -0400 | |
36 | --- y.tab.c 2014-04-07 11:48:31.000000000 -0400 | |
37 | *************** | |
38 | *** 4737,4741 **** | |
39 | if (shell_input_line_terminator != EOF) | |
40 | { | |
41 | ! if (shell_input_line_size < SIZE_MAX && shell_input_line_len > shell_input_line_size - 3) | |
42 | shell_input_line = (char *)xrealloc (shell_input_line, | |
43 | 1 + (shell_input_line_size += 2)); | |
44 | --- 4737,4741 ---- | |
45 | if (shell_input_line_terminator != EOF) | |
46 | { | |
47 | ! if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) | |
48 | shell_input_line = (char *)xrealloc (shell_input_line, | |
49 | 1 + (shell_input_line_size += 2)); | |
50 | *** ../bash-4.3/patchlevel.h 2012-12-29 10:47:57.000000000 -0500 | |
51 | --- patchlevel.h 2014-03-20 20:01:28.000000000 -0400 | |
52 | *************** | |
53 | *** 26,30 **** | |
54 | looks for to find the patch level (for the sccs version string). */ | |
55 | ||
56 | ! #define PATCHLEVEL 8 | |
57 | ||
58 | #endif /* _PATCHLEVEL_H_ */ | |
59 | --- 26,30 ---- | |
60 | looks for to find the patch level (for the sccs version string). */ | |
61 | ||
62 | ! #define PATCHLEVEL 9 | |
63 | ||
64 | #endif /* _PATCHLEVEL_H_ */ |