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| author |  Junio C Hamano <gitster@pobox.com> | 2017-03-12 23:21:34 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2017-03-12 23:21:34 -0700 |
| commit | 36d5286f6815542761dae92fdcdce8db1556727f (patch) | |
| tree | c17757243d083a95e846e0d701fafebe57513c4a | |
| parent | Merge branch 'ss/remote-bzr-hg-placeholder-wo-python' (diff) | |
| parent | line-log.c: prevent crash during union of too many ranges (diff) | |
| download | tgif-36d5286f6815542761dae92fdcdce8db1556727f.tar.xz | |
Merge branch 'ax/line-log-range-merge-fix'
The code to parse "git log -L..." command line was buggy when there
are many ranges specified with -L; overrun of the allocated buffer
has been fixed.
* ax/line-log-range-merge-fix:
line-log.c: prevent crash during union of too many ranges
| -rw-r--r-- | line-log.c | 15 | ||||
| -rwxr-xr-x | t/t4211-line-log.sh | 10 |
2 files changed, 17 insertions, 8 deletions
diff --git a/line-log.c b/line-log.c index 65f3558b3b..9510296659 100644 --- a/line-log.c +++ b/line-log.c @@ -144,7 +144,7 @@ void sort_and_merge_range_set(struct range_set *rs) static void range_set_union(struct range_set *out, struct range_set *a, struct range_set *b) { - int i = 0, j = 0, o = 0; + int i = 0, j = 0; struct range *ra = a->ranges; struct range *rb = b->ranges; /* cannot make an alias of out->ranges: it may change during grow */ @@ -167,16 +167,15 @@ static void range_set_union(struct range_set *out, new = &rb[j++]; if (new->start == new->end) ; /* empty range */ - else if (!o || out->ranges[o-1].end < new->start) { + else if (!out->nr || out->ranges[out->nr-1].end < new->start) { range_set_grow(out, 1); - out->ranges[o].start = new->start; - out->ranges[o].end = new->end; - o++; - } else if (out->ranges[o-1].end < new->end) { - out->ranges[o-1].end = new->end; + out->ranges[out->nr].start = new->start; + out->ranges[out->nr].end = new->end; + out->nr++; + } else if (out->ranges[out->nr-1].end < new->end) { + out->ranges[out->nr-1].end = new->end; } } - out->nr = o; } /* diff --git a/t/t4211-line-log.sh b/t/t4211-line-log.sh index 9d87777b59..d0377fae5c 100755 --- a/t/t4211-line-log.sh +++ b/t/t4211-line-log.sh @@ -106,4 +106,14 @@ test_expect_success '-L with --output' ' test_line_count = 70 log ' +test_expect_success 'range_set_union' ' + test_seq 500 > c.c && + git add c.c && + git commit -m "many lines" && + test_seq 1000 > c.c && + git add c.c && + git commit -m "modify many lines" && + git log $(for x in $(test_seq 200); do echo -L $((2*x)),+1:c.c; done) +' + test_done |