This patch adds boundary checks for nconf's i-search pattern. Further, the pattern buffer is always bzero'ed when '/' is pressed, so the second line in the code below was not needed (and otherwise wouldn't have worked as expected): state->pattern[strlen(state->pattern)] = c; state->pattern[strlen(state->pattern)] = '\0'; Finally, the pattern length was reduced to a length that still seems sufficient but will not fill more than the top line of the screen, thus eliminating special treatment needs on resizes or normal exit of i-search. Signed-off-by: Dirk Gouders <dirk@xxxxxxxxxxx> --- Changes in v2: Correct S-O-B line, remove double search from subject. --- scripts/kconfig/nconf.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c index 97b78445584b..0e224528aaf9 100644 --- a/scripts/kconfig/nconf.c +++ b/scripts/kconfig/nconf.c @@ -1007,11 +1007,12 @@ static void adj_match_dir(match_f *match_direction) /* else, do no change.. */ } +#define PATTERN_LENGTH 64 struct match_state { int in_search; match_f match_direction; - char pattern[256]; + char pattern[PATTERN_LENGTH]; }; /* Return 0 means I have handled the key. In such a case, ans should hold the @@ -1035,8 +1036,8 @@ static int do_match(int key, struct match_state *state, int *ans) return 1; if (isalnum(c) || isgraph(c) || c == ' ') { - state->pattern[strlen(state->pattern)] = c; - state->pattern[strlen(state->pattern)] = '\0'; + if (strlen(state->pattern) + 1 < PATTERN_LENGTH) + state->pattern[strlen(state->pattern)] = c; adj_match_dir(&state->match_direction); *ans = get_mext_match(state->pattern, state->match_direction); @@ -1049,7 +1050,8 @@ static int do_match(int key, struct match_state *state, int *ans) *ans = get_mext_match(state->pattern, state->match_direction); } else if (key == KEY_BACKSPACE || key == 127) { - state->pattern[strlen(state->pattern)-1] = '\0'; + if (state->pattern[0] != '\0') + state->pattern[strlen(state->pattern)-1] = '\0'; adj_match_dir(&state->match_direction); } else terminate_search = 1; -- 2.16.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html