[PATCH iproute2 v2] json_print: Fix hidden 64-bit type promotion

Toke Høiland-Jørgensen
2018-04-25T14:31:54Z

print_uint() will silently promote its variable type to uint64_t, but there
is nothing that ensures that the format string specifier passed along with
it fits (and the function name suggest to pass "%u").

Fix this by changing print_uint() to use a native 'unsigned int' type, and
introduce a separate print_u64() function for printing 64-bit values. All
call sites that were actually printing 64-bit values using print_uint() are
converted to use print_u64() instead.

Since print_int() was already using native int types, just add a
print_s64() to match, but don't convert any call sites.

Cc: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
---
Changes since v1 (which was sent by Kevin Darbyshire-Bryant):
- Add print_u64() and convert call sites that were actually passing
64-bit values to print_uint().

include/json_print.h | 4 ++-
include/json_writer.h | 12 ++++++---
ip/ipaddress.c | 62 +++++++++++++++++++++----------------------
ip/ipmacsec.c | 8 +++---
ip/ipmroute.c | 6 ++---
lib/json_print.c | 4 ++-
lib/json_writer.c | 30 ++++++++++++++++++---
7 files changed, 78 insertions(+), 48 deletions(-)

diff --git a/include/json_print.h b/include/json_print.h
index 2ca7830a..4677618e 100644
--- a/include/json_print.h
+++ b/include/json_print.h
@@ -56,10 +56,12 @@ void close_json_array(enum output_type type, const char *delim);
print_color_##type_name(t, COLOR_NONE, key, fmt, value); \
}
_PRINT_FUNC(int, int);
+_PRINT_FUNC(s64, int64_t);
_PRINT_FUNC(bool, bool);
_PRINT_FUNC(null, const char*);
_PRINT_FUNC(string, const char*);
-_PRINT_FUNC(uint, uint64_t);
+_PRINT_FUNC(uint, unsigned int);
+_PRINT_FUNC(u64, uint64_t);
_PRINT_FUNC(hu, unsigned short);
_PRINT_FUNC(hex, unsigned int);
_PRINT_FUNC(0xhex, unsigned int);
diff --git a/include/json_writer.h b/include/json_writer.h
index 4b4dec28..9d3f37f8 100644
--- a/include/json_writer.h
+++ b/include/json_writer.h
@@ -34,10 +34,12 @@ void jsonw_string(json_writer_t *self, const char *value);
void jsonw_bool(json_writer_t *self, bool value);
void jsonw_float(json_writer_t *self, double number);
void jsonw_float_fmt(json_writer_t *self, const char *fmt, double num);
-void jsonw_uint(json_writer_t *self, uint64_t number);
+void jsonw_uint(json_writer_t *self, unsigned int number);
+void jsonw_u64(json_writer_t *self, uint64_t number);
void jsonw_xint(json_writer_t *self, uint64_t number);
void jsonw_hu(json_writer_t *self, unsigned short number);
-void jsonw_int(json_writer_t *self, int64_t number);
+void jsonw_int(json_writer_t *self, int number);
+void jsonw_s64(json_writer_t *self, int64_t number);
void jsonw_null(json_writer_t *self);
void jsonw_lluint(json_writer_t *self, unsigned long long int num);

@@ -45,10 +47,12 @@ void jsonw_lluint(json_writer_t *self, unsigned long long int num);
void jsonw_string_field(json_writer_t *self, const char *prop, const char *val);
void jsonw_bool_field(json_writer_t *self, const char *prop, bool value);
void jsonw_float_field(json_writer_t *self, const char *prop, double num);
-void jsonw_uint_field(json_writer_t *self, const char *prop, uint64_t num);
+void jsonw_uint_field(json_writer_t *self, const char *prop, unsigned int num);
+void jsonw_u64_field(json_writer_t *self, const char *prop, uint64_t num);
void jsonw_xint_field(json_writer_t *self, const char *prop, uint64_t num);
void jsonw_hu_field(json_writer_t *self, const char *prop, unsigned short num);
-void jsonw_int_field(json_writer_t *self, const char *prop, int64_t num);
+void jsonw_int_field(json_writer_t *self, const char *prop, int num);
+void jsonw_s64_field(json_writer_t *self, const char *prop, int64_t num);
void jsonw_null_field(json_writer_t *self, const char *prop);
void jsonw_lluint_field(json_writer_t *self, const char *prop,
unsigned long long int num);
diff --git a/ip/ipaddress.c b/ip/ipaddress.c
index aecc9a1d..75539e05 100644
--- a/ip/ipaddress.c
+++ b/ip/ipaddress.c
@@ -554,21 +554,21 @@ static void print_vf_stats64(FILE *fp, struct rtattr *vfstats)

/* RX stats */
open_json_object("rx");
- print_uint(PRINT_JSON, "bytes", NULL,
+ print_u64(PRINT_JSON, "bytes", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_RX_BYTES]));
- print_uint(PRINT_JSON, "packets", NULL,
+ print_u64(PRINT_JSON, "packets", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_RX_PACKETS]));
- print_uint(PRINT_JSON, "multicast", NULL,
+ print_u64(PRINT_JSON, "multicast", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_MULTICAST]));
- print_uint(PRINT_JSON, "broadcast", NULL,
+ print_u64(PRINT_JSON, "broadcast", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_BROADCAST]));
close_json_object();

/* TX stats */
open_json_object("tx");
- print_uint(PRINT_JSON, "tx_bytes", NULL,
+ print_u64(PRINT_JSON, "tx_bytes", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_TX_BYTES]));
- print_uint(PRINT_JSON, "tx_packets", NULL,
+ print_u64(PRINT_JSON, "tx_packets", NULL,
rta_getattr_u64(vf[IFLA_VF_STATS_TX_PACKETS]));
close_json_object();
close_json_object();
@@ -608,69 +608,69 @@ static void __print_link_stats(FILE *fp, struct rtattr *tb[])

/* RX stats */
open_json_object("rx");
- print_uint(PRINT_JSON, "bytes", NULL, s->rx_bytes);
- print_uint(PRINT_JSON, "packets", NULL, s->rx_packets);
- print_uint(PRINT_JSON, "errors", NULL, s->rx_errors);
- print_uint(PRINT_JSON, "dropped", NULL, s->rx_dropped);
- print_uint(PRINT_JSON, "over_errors", NULL, s->rx_over_errors);
- print_uint(PRINT_JSON, "multicast", NULL, s->multicast);
+ print_u64(PRINT_JSON, "bytes", NULL, s->rx_bytes);
+ print_u64(PRINT_JSON, "packets", NULL, s->rx_packets);
+ print_u64(PRINT_JSON, "errors", NULL, s->rx_errors);
+ print_u64(PRINT_JSON, "dropped", NULL, s->rx_dropped);
+ print_u64(PRINT_JSON, "over_errors", NULL, s->rx_over_errors);
+ print_u64(PRINT_JSON, "multicast", NULL, s->multicast);
if (s->rx_compressed)
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"compressed", NULL, s->rx_compressed);

/* RX error stats */
if (show_stats > 1) {
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"length_errors",
NULL, s->rx_length_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"crc_errors",
NULL, s->rx_crc_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"frame_errors",
NULL, s->rx_frame_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"fifo_errors",
NULL, s->rx_fifo_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"missed_errors",
NULL, s->rx_missed_errors);
if (s->rx_nohandler)
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"nohandler", NULL, s->rx_nohandler);
}
close_json_object();

/* TX stats */
open_json_object("tx");
- print_uint(PRINT_JSON, "bytes", NULL, s->tx_bytes);
- print_uint(PRINT_JSON, "packets", NULL, s->tx_packets);
- print_uint(PRINT_JSON, "errors", NULL, s->tx_errors);
- print_uint(PRINT_JSON, "dropped", NULL, s->tx_dropped);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON, "bytes", NULL, s->tx_bytes);
+ print_u64(PRINT_JSON, "packets", NULL, s->tx_packets);
+ print_u64(PRINT_JSON, "errors", NULL, s->tx_errors);
+ print_u64(PRINT_JSON, "dropped", NULL, s->tx_dropped);
+ print_u64(PRINT_JSON,
"carrier_errors",
NULL, s->tx_carrier_errors);
- print_uint(PRINT_JSON, "collisions", NULL, s->collisions);
+ print_u64(PRINT_JSON, "collisions", NULL, s->collisions);
if (s->tx_compressed)
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"compressed", NULL, s->tx_compressed);

/* TX error stats */
if (show_stats > 1) {
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"aborted_errors",
NULL, s->tx_aborted_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"fifo_errors",
NULL, s->tx_fifo_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"window_errors",
NULL, s->tx_window_errors);
- print_uint(PRINT_JSON,
+ print_u64(PRINT_JSON,
"heartbeat_errors",
NULL, s->tx_heartbeat_errors);
if (carrier_changes)
- print_uint(PRINT_JSON, "carrier_changes", NULL,
+ print_u64(PRINT_JSON, "carrier_changes", NULL,
rta_getattr_u32(carrier_changes));
}

diff --git a/ip/ipmacsec.c b/ip/ipmacsec.c
index 38ec7136..4e4e158e 100644
--- a/ip/ipmacsec.c
+++ b/ip/ipmacsec.c
@@ -640,7 +640,7 @@ static void print_attrs(struct rtattr *attrs[])
}
}

-static __u64 getattr_uint(struct rtattr *stat)
+static __u64 getattr_u64(struct rtattr *stat)
{
switch (RTA_PAYLOAD(stat)) {
case sizeof(__u64):
@@ -681,7 +681,7 @@ static void print_fp_stats(const char *prefix,

pad = strlen(names[i]) + 1;
if (stats[i])
- printf("%*llu", pad, getattr_uint(stats[i]));
+ printf("%*llu", pad, getattr_u64(stats[i]));
else
printf("%*c", pad, '-');
}
@@ -697,8 +697,8 @@ static void print_json_stats(const char *names[], unsigned int num,
if (!names[i] || !stats[i])
continue;

- print_uint(PRINT_JSON, names[i],
- NULL, getattr_uint(stats[i]));
+ print_u64(PRINT_JSON, names[i],
+ NULL, getattr_u64(stats[i]));
}
}

diff --git a/ip/ipmroute.c b/ip/ipmroute.c
index 59c5b771..cdb4d898 100644
--- a/ip/ipmroute.c
+++ b/ip/ipmroute.c
@@ -182,12 +182,12 @@ int print_mroute(const struct sockaddr_nl *who, struct nlmsghdr *n, void *arg)
struct rta_mfc_stats *mfcs = RTA_DATA(tb[RTA_MFC_STATS]);

print_string(PRINT_FP, NULL, "%s", _SL_);
- print_uint(PRINT_ANY, "packets", " %"PRIu64" packets,",
+ print_u64(PRINT_ANY, "packets", " %"PRIu64" packets,",
mfcs->mfcs_packets);
- print_uint(PRINT_ANY, "bytes", " %"PRIu64" bytes", mfcs->mfcs_bytes);
+ print_u64(PRINT_ANY, "bytes", " %"PRIu64" bytes", mfcs->mfcs_bytes);

if (mfcs->mfcs_wrong_if)
- print_uint(PRINT_ANY, "wrong_if",
+ print_u64(PRINT_ANY, "wrong_if",
", %"PRIu64" arrived on wrong iif.",
mfcs->mfcs_wrong_if);
}
diff --git a/lib/json_print.c b/lib/json_print.c
index bda72933..7a1cfa57 100644
--- a/lib/json_print.c
+++ b/lib/json_print.c
@@ -116,8 +116,10 @@ void close_json_array(enum output_type type, const char *str)
} \
}
_PRINT_FUNC(int, int);
+_PRINT_FUNC(s64, int64_t);
_PRINT_FUNC(hu, unsigned short);
-_PRINT_FUNC(uint, uint64_t);
+_PRINT_FUNC(uint, unsigned int);
+_PRINT_FUNC(u64, uint64_t);
_PRINT_FUNC(lluint, unsigned long long int);
_PRINT_FUNC(float, double);
#undef _PRINT_FUNC
diff --git a/lib/json_writer.c b/lib/json_writer.c
index 0ad04218..dc2fdd49 100644
--- a/lib/json_writer.c
+++ b/lib/json_writer.c
@@ -220,7 +220,12 @@ void jsonw_hu(json_writer_t *self, unsigned short num)
jsonw_printf(self, "%hu", num);
}

-void jsonw_uint(json_writer_t *self, uint64_t num)
+void jsonw_uint(json_writer_t *self, unsigned int num)
+{
+ jsonw_printf(self, "%u", num);
+}
+
+void jsonw_u64(json_writer_t *self, uint64_t num)
{
jsonw_printf(self, "%"PRIu64, num);
}
@@ -235,7 +240,12 @@ void jsonw_lluint(json_writer_t *self, unsigned long long int num)
jsonw_printf(self, "%llu", num);
}

-void jsonw_int(json_writer_t *self, int64_t num)
+void jsonw_int(json_writer_t *self, int num)
+{
+ jsonw_printf(self, "%d", num);
+}
+
+void jsonw_s64(json_writer_t *self, int64_t num)
{
jsonw_printf(self, "%"PRId64, num);
}
@@ -268,12 +278,18 @@ void jsonw_float_field_fmt(json_writer_t *self,
jsonw_float_fmt(self, fmt, val);
}

-void jsonw_uint_field(json_writer_t *self, const char *prop, uint64_t num)
+void jsonw_uint_field(json_writer_t *self, const char *prop, unsigned int num)
{
jsonw_name(self, prop);
jsonw_uint(self, num);
}

+void jsonw_u64_field(json_writer_t *self, const char *prop, uint64_t num)
+{
+ jsonw_name(self, prop);
+ jsonw_u64(self, num);
+}
+
void jsonw_xint_field(json_writer_t *self, const char *prop, uint64_t num)
{
jsonw_name(self, prop);
@@ -294,12 +310,18 @@ void jsonw_lluint_field(json_writer_t *self,
jsonw_lluint(self, num);
}

-void jsonw_int_field(json_writer_t *self, const char *prop, int64_t num)
+void jsonw_int_field(json_writer_t *self, const char *prop, int num)
{
jsonw_name(self, prop);
jsonw_int(self, num);
}

+void jsonw_s64_field(json_writer_t *self, const char *prop, int64_t num)
+{
+ jsonw_name(self, prop);
+ jsonw_s64(self, num);
+}
+
void jsonw_null_field(json_writer_t *self, const char *prop)
{
jsonw_name(self, prop);
--
2.17.0