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Message-ID: <20250929160230.36941-2-sidharthseela@gmail.com>
Date: Mon, 29 Sep 2025 21:32:31 +0530
From: Sidharth Seela <sidharthseela@...il.com>
To: antonio@...nvpn.net,
sd@...asysnail.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
horms@...nel.org,
shuah@...nel.org,
willemdebruijn.kernel@...il.com,
kernelxing@...cent.com,
nathan@...nel.org,
nick.desaulniers+lkml@...il.com,
morbo@...gle.com,
justinstitt@...gle.com
Cc: netdev@...r.kernel.org,
linux-kselftest@...r.kernel.org,
linux-kernel@...r.kernel.org,
llvm@...ts.linux.dev,
david.hunter.linux@...il.com,
Sidharth Seela <sidharthseela@...il.com>
Subject: [PATCH v2] net: Fix uninit character pointer and return values
Fix uninitialized character pointer, and functions that return
undefined values. These issues were caught by running clang using LLVM=1
option; and are as follows:
--
ovpn-cli.c:1587:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
1587 | if (!sock) {
| ^~~~~
ovpn-cli.c:1635:9: note: uninitialized use occurs here
1635 | return ret;
| ^~~
ovpn-cli.c:1587:2: note: remove the 'if' if its condition is always false
1587 | if (!sock) {
| ^~~~~~~~~~~~
1588 | fprintf(stderr, "cannot allocate netlink socket\n");
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1589 | goto err_free;
| ~~~~~~~~~~~~~~
1590 | }
| ~
ovpn-cli.c:1584:15: note: initialize the variable 'ret' to silence this warning
1584 | int mcid, ret;
| ^
| = 0
ovpn-cli.c:2107:7: warning: variable 'ret' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
2107 | case CMD_INVALID:
| ^~~~~~~~~~~
ovpn-cli.c:2111:9: note: uninitialized use occurs here
2111 | return ret;
| ^~~
ovpn-cli.c:1939:12: note: initialize the variable 'ret' to silence this warning
1939 | int n, ret;
| ^
|
--
so_txtime.c:210:3: warning: variable 'reason' is used uninitialized whenever switch default is taken [-Wsometimes-uninitialized]
210 | default:
| ^~~~~~~
so_txtime.c:219:27: note: uninitialized use occurs here
219 | data[ret - 1], tstamp, reason);
| ^~~~~~
so_txtime.c:177:21: note: initialize the variable 'reason' to silence this warning
177 | const char *reason;
| ^
|
--
Fixes: 959bc330a439 ("testing/selftests: add test tool and scripts for ovpn module")
ovpn module")
Fixes: ca8826095e4d4 ("selftests/net: report etf errors correctly")
Signed-off-by: Sidharth Seela <sidharthseela@...il.com>
v2:
- Use subsystem name "net".
- Add fixes tags.
- Remove txtimestamp fix as default case calls error.
- Assign constant error string instead of NULL.
--
diff --git a/tools/testing/selftests/net/ovpn/ovpn-cli.c b/tools/testing/selftests/net/ovpn/ovpn-cli.c
index 9201f2905f2c..20d00378f34a 100644
--- a/tools/testing/selftests/net/ovpn/ovpn-cli.c
+++ b/tools/testing/selftests/net/ovpn/ovpn-cli.c
@@ -1581,7 +1581,7 @@ static int ovpn_listen_mcast(void)
{
struct nl_sock *sock;
struct nl_cb *cb;
- int mcid, ret;
+ int mcid, ret = -1;
sock = nl_socket_alloc();
if (!sock) {
@@ -1936,7 +1936,7 @@ static int ovpn_run_cmd(struct ovpn_ctx *ovpn)
{
char peer_id[10], vpnip[INET6_ADDRSTRLEN], laddr[128], lport[10];
char raddr[128], rport[10];
- int n, ret;
+ int n, ret = -1;
FILE *fp;
switch (ovpn->cmd) {
diff --git a/tools/testing/selftests/net/so_txtime.c b/tools/testing/selftests/net/so_txtime.c
index 8457b7ccbc09..5bf3c483069b 100644
--- a/tools/testing/selftests/net/so_txtime.c
+++ b/tools/testing/selftests/net/so_txtime.c
@@ -174,7 +174,7 @@ static int do_recv_errqueue_timeout(int fdt)
msg.msg_controllen = sizeof(control);
while (1) {
- const char *reason;
+ const char *reason = "unknown errno";
ret = recvmsg(fdt, &msg, MSG_ERRQUEUE);
if (ret == -1 && errno == EAGAIN)
--
2.47.3
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