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| author | René Scharfe <l.s.r@web.de> | 2019-08-17 18:23:52 +0200 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2019-08-19 19:47:28 +0200 |
| commit | 4060c1990a9cceb710808bd4b4ab94d2355aefff (patch) | |
| tree | 0d3656cbafb936c784653b8de4c4f2ed9cf11d83 /archive-tar.c | |
| parent | mingw: allow building with an MSYS2 runtime v3.x (diff) | |
| download | git-4060c1990a9cceb710808bd4b4ab94d2355aefff.tar.xz git-4060c1990a9cceb710808bd4b4ab94d2355aefff.zip | |
archive-tar: report wrong pax extended header length
Extended header entries contain a length value that is a bit tricky to
calculate because it includes its own length (number of decimal digits)
as well. We get it wrong in corner cases. Add a check, report wrong
results as a warning and add a test for exercising it.
Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'archive-tar.c')
| -rw-r--r-- | archive-tar.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/archive-tar.c b/archive-tar.c index 4aabd566fb..181da4e843 100644 --- a/archive-tar.c +++ b/archive-tar.c @@ -144,6 +144,7 @@ static int stream_blocked(const struct object_id *oid) static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, const char *value, unsigned int valuelen) { + size_t orig_len = sb->len; int len, tmp; /* "%u %s=%s\n" */ @@ -155,6 +156,11 @@ static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, strbuf_addf(sb, "%u %s=", len, keyword); strbuf_add(sb, value, valuelen); strbuf_addch(sb, '\n'); + + if (len != sb->len - orig_len) + warning("pax extended header length miscalculated as %d" + ", should be %"PRIuMAX, + len, (uintmax_t)(sb->len - orig_len)); } /* |