commit 6d24b4ff69913270ce1e5267dd6bd8454f75e2b9
author Bram Moolenaar <Bram@vim.org> Mon May 23 12:01:50 2022 +0100
committer Bram Moolenaar <Bram@vim.org> Mon May 23 12:01:50 2022 +0100
tree 3bddc65d5ad155e32dca4d8c27048c004ed04599
parent 68e64d2c1735f2a39afa8a0475ae29bedb116684

patch 8.2.5007: spell suggestion may use uninitialized memory

Problem:    Spell suggestion may use uninitialized memory. (Zdenek Dohnal)
Solution:   Avoid going over the end of the word.

src/spellsuggest.c

diff --git a/src/spellsuggest.c b/src/spellsuggest.c
index 4a71438..5b460a3 100644
--- a/src/spellsuggest.c
+++ b/src/spellsuggest.c
@@ -1953,7 +1953,8 @@
 #endif
 		    ++depth;
 		    sp = &stack[depth];
-		    ++sp->ts_fidx;
+		    if (fword[sp->ts_fidx] != NUL)
+			++sp->ts_fidx;
 		    tword[sp->ts_twordlen++] = c;
 		    sp->ts_arridx = idxs[arridx];
 		    if (newscore == SCORE_SUBST)