patches/44.init_char_array.patch

Change 640269658 by sungyc@sungyc:fig-export-hunspell-7504-change-4:7520:citc on 2024/06/04 13:44:22

	[hunspell][vulnerability fix] Initialize char array
	
	## Test plan
	```
	sso_client -location 'https://clusterfuzz.corp.google.com/testcase-detail/download-testcase?id=5210985962471424' > /tmp/testcase-5210985962471424 && \
	blaze --blazerc=/dev/null test -c opt --config=fuzztest-msan --copt=-DNDEBUG \
	  --test_strategy=local \
	  --test_sharding_strategy=disabled \
	  --test_env=FUZZTEST_REPLAY=/tmp/testcase-5210985962471424 \
	  --test_filter=LLVMFuzzer.TestOneInput \
	  //third_party/hunspell/fuzzers:suggestions_fuzzer
	```
	
	PRESUBMIT=passed
	BUG=336674722
	R=tjbarron
	APPROVED=tjbarron
	REQUIRED_REVIEW=1
	DELTA=1 (0 added, 0 deleted, 1 changed)
	DELTA_BY_EXTENSION=cxx=1
	OCL=639945677
	FIG_CHANGESET=97f4e76a9360b2e68df5e7668ad14270d543631a
	FIG_WORKSPACE=sungyc/7504:hunspell
	MARKDOWN=true

Affected files ...

... //depot//src/hunspell/affentry.cxx#4 edit

==== //depot//src/hunspell/affentry.cxx#3 - /google/src/files/640269658/depot//src/hunspell/affentry.cxx ====
--- /google/src/files/171343973/depot//src/hunspell/affentry.cxx	2017-10-06 17:25:31.000000000 -0400
+++ /google/src/files/640269658/depot//src/hunspell/affentry.cxx	2024-06-04 16:44:22.000000000 -0400
@@ -153,7 +153,7 @@
 {
     int                 tmpl;   // length of tmpword
     struct hentry *     he;     // hash entry of root word or NULL
-    char                tmpword[MAXWORDUTF8LEN + 4];
+    char                tmpword[MAXWORDUTF8LEN + 4] = {0};
 
     // on entry prefix is 0 length or already matches the beginning of the word.
     // So if the remaining root word has positive length