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curl_fnmatch: only allow two asterisks for matching

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The previous limit of 5 can still end up in situation that takes a very
long time and consumes a lot of CPU.

If there is still a rare use case for this, a user can provide their own
fnmatch callback for a version that allows a larger set of wildcards.

This commit was triggered by yet another OSS-Fuzz timeout due to this.
Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=8369

Closes #2587
This commit is contained in:
Daniel Stenberg 2018-05-18 16:48:13 +02:00
parent 27aebcc1d1
commit 404c8850da
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GPG key ID: 5CC908FDB71E12C2
3 changed files with 3 additions and 7 deletions
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4
tests/unit/unit1307.c
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@ -185,11 +185,7 @@ static const struct testcase tests[] = {
{ "\\?.txt", "x.txt", NOMATCH },
{ "\\*.txt", "x.txt", NOMATCH },
{ "\\*\\\\.txt", "*\\.txt", MATCH },
{ "*\\**\\?*\\\\*", "cc*cc?cc\\cc*cc", MATCH },
{ "*\\**\\?*\\\\*", "cc*cc?cccc", NOMATCH },
{ "*\\**\\?*\\\\*", "cc*cc?cc\\cc*cc", MATCH },
{ "*\\?*\\**", "cc?c*c", MATCH },
{ "*\\?*\\**curl*", "cc?c*curl", MATCH },
{ "*\\?*\\**", "cc?cc", NOMATCH },
{ "\\\"\\$\\&\\'\\(\\)", "\"$&'()", MATCH },
{ "\\*\\?\\[\\\\\\`\\|", "*?[\\`|", MATCH },