fast-import: stricter parsing of integer options

Check the result from strtoul to avoid accepting arguments like
--depth=-1 and --active-branches=foo,bar,baz.

Requested-by: Ramkumar Ramachandra <artagnon@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/fast-import.c b/fast-import.c
index 77549ebd6fbfbea051901d4ab474eebc8e2dbdbd..4bd9bf7d08905ab9e37671734e00222fb1b917ca 100644 (file)
--- a/fast-import.c
+++ b/fast-import.c
@@ -2746,16 +2746,25 @@ static void option_date_format(const char *fmt)
                die("unknown --date-format argument %s", fmt);
 }
 
+static unsigned long ulong_arg(const char *option, const char *arg)
+{
+       char *endptr;
+       unsigned long rv = strtoul(arg, &endptr, 0);
+       if (strchr(arg, '-') || endptr == arg || *endptr)
+               die("%s: argument must be a non-negative integer", option);
+       return rv;
+}
+
 static void option_depth(const char *depth)
 {
-       max_depth = strtoul(depth, NULL, 0);
+       max_depth = ulong_arg("--depth", depth);
        if (max_depth > MAX_DEPTH)
                die("--depth cannot exceed %u", MAX_DEPTH);
 }
 
 static void option_active_branches(const char *branches)
 {
-       max_active_branches = strtoul(branches, NULL, 0);
+       max_active_branches = ulong_arg("--active-branches", branches);
 }
 
 static void option_export_marks(const char *marks)

diff --git a/t/t9300-fast-import.sh b/t/t9300-fast-import.sh
index 14d17691b1c48e2b3211812a16d6dda7e83ad31a..c80bb0cf10680dce5d28197416dff7d851aa553f 100755 (executable)
--- a/t/t9300-fast-import.sh
+++ b/t/t9300-fast-import.sh
@@ -1659,6 +1659,14 @@ test_expect_success 'R: unknown commandline options are rejected' '\
     test_must_fail git fast-import --non-existing-option < /dev/null
 '
 
+test_expect_success 'R: die on invalid option argument' '
+       echo "option git active-branches=-5" |
+       test_must_fail git fast-import &&
+       echo "option git depth=" |
+       test_must_fail git fast-import &&
+       test_must_fail git fast-import --depth="5 elephants" </dev/null
+'
+
 cat >input <<EOF
 option non-existing-vcs non-existing-option
 EOF