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Merge pull request #3033 from facebook/fix44108

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fix issue 44108
This commit is contained in:
Yann Collet
2022-01-27 10:57:48 -08:00
committed by GitHub
parent bad7f82300 8df1257c3c
commit 5d70ec0bc4
1 changed files with 4 additions and 1 deletions
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lib/compress/zstd_compress.c
+4 -1
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@@ -3440,8 +3440,11 @@ ZSTD_resolveRepcodeToRawOffset(const U32 rep[ZSTD_REP_NUM], const U32 offBase, c
if (adjustedRepCode == ZSTD_REP_NUM) { if (adjustedRepCode == ZSTD_REP_NUM) {
/* litlength == 0 and offCode == 2 implies selection of first repcode - 1 /* litlength == 0 and offCode == 2 implies selection of first repcode - 1
* This is only valid if it results in a valid offset value, aka > 0. * This is only valid if it results in a valid offset value, aka > 0.
* Note : it may happen that `rep[0]==1` in exceptional circumstances.
* In which case this function will return 0, which is an invalid offset.
* It's not an issue though, since this value will be
* compared and discarded within ZSTD_seqStore_resolveOffCodes().
*/ */
assert(rep[0] > 1);
return rep[0] - 1; return rep[0] - 1;
} }
return rep[adjustedRepCode]; return rep[adjustedRepCode];