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| author | Andrzej Hunt <andrzej@ahunt.org> | 2021-09-26 15:58:33 +0000 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2021-09-27 10:34:41 -0700 |
| commit | 44d2aec6e8795ac22b9121b3d2ecf43589e8ecd2 (patch) | |
| tree | 01dec43890b025294f6b3dc98c0fae211034c50d | |
| parent | 225bc32a989d7a22fa6addafd4ce7dcd04675dbf (diff) | |
connect: also update offset for features without values
parse_feature_value() takes an offset, and uses it to seek past the
point in features_list that we've already seen. However if the feature
being searched for does not specify a value, the offset is not
updated. Therefore if we call parse_feature_value() in a loop on a
value-less feature, we'll keep on parsing the same feature over and over
again. This usually isn't an issue: there's no point in using
next_server_feature_value() to search for repeated instances of the same
capability unless that capability typically specifies a value - but a
broken server could send a response that omits the value for a feature
even when we are expecting a value.
Therefore we add an offset update calculation for the no-value case,
which helps ensure that loops using next_server_feature_value() will
always terminate.
next_server_feature_value(), and the offset calculation, were first
added in 2.28 in 2c6a403d96 (connect: add function to parse multiple
v1 capability values, 2020-05-25).
Thanks to Peff for authoring the test.
Co-authored-by: Jeff King <peff@peff.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Andrzej Hunt <andrzej@ahunt.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rw-r--r-- | connect.c | 2 | ||||
| -rwxr-xr-x | t/t5704-protocol-violations.sh | 15 |
2 files changed, 17 insertions, 0 deletions
@@ -555,6 +555,8 @@ const char *parse_feature_value(const char *feature_list, const char *feature, i if (!*value || isspace(*value)) { if (lenp) *lenp = 0; + if (offset) + *offset = found + len - feature_list; return value; } /* feature with a value (e.g., "agent=git/1.2.3") */ diff --git a/t/t5704-protocol-violations.sh b/t/t5704-protocol-violations.sh index 5c941949b9..bc393d7c31 100755 --- a/t/t5704-protocol-violations.sh +++ b/t/t5704-protocol-violations.sh @@ -32,4 +32,19 @@ test_expect_success 'extra delim packet in v2 fetch args' ' test_i18ngrep "expected flush after fetch arguments" err ' +test_expect_success 'bogus symref in v0 capabilities' ' + test_commit foo && + oid=$(git rev-parse HEAD) && + dst=refs/heads/foo && + { + printf "%s HEAD\0symref object-format=%s symref=HEAD:%s\n" \ + "$oid" "$GIT_DEFAULT_HASH" "$dst" | + test-tool pkt-line pack-raw-stdin && + printf "0000" + } >input && + git ls-remote --symref --upload-pack="cat input; read junk;:" . >actual && + printf "ref: %s\tHEAD\n%s\tHEAD\n" "$dst" "$oid" >expect && + test_cmp expect actual +' + test_done |