Merge branch 'ax/line-log-range-merge-fix' into maint
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
diff --git a/line-log.c b/line-log.c
index 65f3558..9510296 100644
--- a/line-log.c
+++ b/line-log.c
@@ -144,7 +144,7 @@
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 @@
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 9d87777..d0377fa 100755
--- a/t/t4211-line-log.sh
+++ b/t/t4211-line-log.sh
@@ -106,4 +106,14 @@
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
