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net: gPTP: Fix pointer type in gptp_add_port

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The number of ports in gptp_domain.default_ds.nb_ports is a uint8_t.
A pointer to it is passed to gptp_add_port.
However, in this method, the pointer is cast to an int pointer.
The C compiler generates an int-size store for this.
In addition to potentially overwriting adjacent attributes, on platforms
such as RISC-V that do not support unaligned accesses, this causes an
exception on access.
This commit casts nb_ports to the correct type, uint8_t.

Signed-off-by: Eric Ackermann <eric.ackermann@cispa.de>
This commit is contained in:
Eric Ackermann 2025-04-11 18:44:06 +02:00 • committed by Benjamin Cabé
commit 421a7047e5
1 changed files with 1 additions and 1 deletions
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subsys/net/l2/ethernet/gptp/gptp.c
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@ -586,7 +586,7 @@ static void gptp_thread(void *p1, void *p2, void *p3)
static void gptp_add_port(struct net_if *iface, void *user_data)
{
int *num_ports = user_data;
uint8_t *num_ports = user_data;
const struct device *clk;
if (*num_ports >= CONFIG_NET_GPTP_NUM_PORTS) {