When producing a printable mac address the buffer was appropriately sized
for holding the mac address exactly, but the actual snprintf included a
'\n' character at the end, which means that the snprintf technically is
getting truncated i.e. the \n would not be added due to lack of space.
This gets flagged as a problem by modern versions of gcc, e.g. on Ubuntu
20.04.
main.c:77:37: warning: ‘__builtin___snprintf_chk’ output truncated before the
last format character [-Wformat-truncation=]
77 | "%02x:%02x:%02x:%02x:%02x:%02x\n",
| ^
Since the \n is getting stripped anyway, we can fix the issue by just
removing it from the printf string.
Fixes: af75078fece3 ("first public release")
Cc: [email protected]
Signed-off-by: Bruce Richardson <[email protected]>
---
examples/multi_process/client_server_mp/mp_server/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/examples/multi_process/client_server_mp/mp_server/main.c
b/examples/multi_process/client_server_mp/mp_server/main.c
index 280dab8672..af5af672c3 100644
--- a/examples/multi_process/client_server_mp/mp_server/main.c
+++ b/examples/multi_process/client_server_mp/mp_server/main.c
@@ -74,7 +74,7 @@ get_printable_mac_addr(uint16_t port)
return err_address;
}
snprintf(addresses[port], sizeof(addresses[port]),
- "%02x:%02x:%02x:%02x:%02x:%02x\n",
+ "%02x:%02x:%02x:%02x:%02x:%02x",
mac.addr_bytes[0], mac.addr_bytes[1],
mac.addr_bytes[2],
mac.addr_bytes[3], mac.addr_bytes[4],
mac.addr_bytes[5]);
}
--
2.25.1
