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option: Fix to reject invalid and overflowing numbers

Browse source 
parse_option_number() fails to check for these errors after
strtoull().  Has always been broken.  Fix that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1487708048-2131-10-git-send-email-armbru@redhat.com>
This commit is contained in:
Markus Armbruster 2017-02-21 21:13:53 +01:00
parent 4baef2679e
commit 3403e5eb88
2 changed files with 16 additions and 14 deletions
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19
tests/test-qemu-opts.c
View file

@ -603,17 +603,15 @@ static void test_opts_parse_number(void)
/* Above upper limit */
opts = qemu_opts_parse(&opts_list_01, "number1=18446744073709551616",
false, &error_abort);
/* BUG: should reject */
g_assert_cmpuint(opts_count(opts), ==, 1);
g_assert_cmpuint(qemu_opt_get_number(opts, "number1", 1), ==, UINT64_MAX);
false, &err);
error_free_or_abort(&err);
g_assert(!opts);
/* Below lower limit */
opts = qemu_opts_parse(&opts_list_01, "number1=-18446744073709551616",
false, &error_abort);
/* BUG: should reject */
g_assert_cmpuint(opts_count(opts), ==, 1);
g_assert_cmpuint(qemu_opt_get_number(opts, "number1", 1), ==, UINT64_MAX);
false, &err);
error_free_or_abort(&err);
g_assert(!opts);
/* Hex and octal */
opts = qemu_opts_parse(&opts_list_01, "number1=0x2a,number2=052",
@ -624,9 +622,8 @@ static void test_opts_parse_number(void)
/* Invalid */
opts = qemu_opts_parse(&opts_list_01, "number1=", false, &err);
/* BUG: should reject */
g_assert_cmpuint(opts_count(opts), ==, 1);
g_assert_cmpuint(qemu_opt_get_number(opts, "number1", 1), ==, 0);
error_free_or_abort(&err);
g_assert(!opts);
opts = qemu_opts_parse(&opts_list_01, "number1=eins", false, &err);
error_free_or_abort(&err);
g_assert(!opts);

11
util/qemu-option.c
View file

@ -141,11 +141,16 @@ static void parse_option_bool(const char *name, const char *value, bool *ret,
static void parse_option_number(const char *name, const char *value,
uint64_t *ret, Error **errp)
{
char *postfix;
uint64_t number;
int err;
number = strtoull(value, &postfix, 0);
if (*postfix != '\0') {
err = qemu_strtou64(value, NULL, 0, &number);
if (err == -ERANGE) {
error_setg(errp, "Value '%s' is too large for parameter '%s'",
value, name);
return;
}
if (err) {
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, name, "a number");
return;
}