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Prop140: Fix a crash bug.

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Found while fuzzing: this could occur if we tried to copy a
nonexistent "line 0" while applying a diff.
This commit is contained in:
Nick Mathewson 2017-03-07 16:06:03 -05:00
parent dd92579b63
commit 12d428aaff
1 changed files with 1 additions and 1 deletions
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2
src/or/consdiff.c
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@ -742,7 +742,7 @@ apply_ed_diff(const smartlist_t *cons1, const smartlist_t *diff,
}
/* Add unchanged lines. */
for (; j > end; --j) {
for (; j && j > end; --j) {
const char *cons_line = smartlist_get(cons1, j-1);
smartlist_add(cons2, tor_strdup(cons_line));
}