Merge branch 'jk/commit-dates-parsing-fix' into maint

Codepaths that parse timestamps in commit objects have been
tightened.

* jk/commit-dates-parsing-fix:
  show_ident_date: fix tz range check
  log: do not segfault on gmtime errors
  log: handle integer overflow in timestamps
  date: check date overflow against time_t
  fsck: report integer overflow in author timestamps
  t4212: test bogus timestamps with git-log

1 files changed, 9 insertions, 3 deletions

diff --git a/pretty.c b/pretty.c
index 87db08bd74..6e266ddf27 100644
--- a/pretty.c
+++ b/pretty.c
@@ -397,12 +397,18 @@ static const char *show_ident_date(const struct ident_split *ident,
 				   enum date_mode mode)
 {
 	unsigned long date = 0;
-	int tz = 0;
+	long tz = 0;
 
 	if (ident->date_begin && ident->date_end)
 		date = strtoul(ident->date_begin, NULL, 10);
-	if (ident->tz_begin && ident->tz_end)
-		tz = strtol(ident->tz_begin, NULL, 10);
+	if (date_overflows(date))
+		date = 0;
+	else {
+		if (ident->tz_begin && ident->tz_end)
+			tz = strtol(ident->tz_begin, NULL, 10);
+		if (tz >= INT_MAX || tz <= INT_MIN)
+			tz = 0;
+	}
 	return show_date(date, tz, mode);
 }