[PATCH] semihosting: fix memleak at semihosting_arg_fallback

[Matheus Tavares Bernardino]

We duplicate "cmd" as strtok may modify its argument, but we forgot
to free it later. Furthermore, add_semihosting_arg doesn't take
responsibility for this memory either (it strdup's the argument).

Signed-off-by: Matheus Tavares Bernardino <quic_mathb...@quicinc.com>
---
 semihosting/config.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/semihosting/config.c b/semihosting/config.c
index 249a377ae8..32aa210460 100644
--- a/semihosting/config.c
+++ b/semihosting/config.c
@@ -112,17 +112,19 @@ static int add_semihosting_arg(void *opaque,
 /* Use strings passed via -kernel/-append to initialize semihosting.argv[] */
 void semihosting_arg_fallback(const char *file, const char *cmd)
 {
-    char *cmd_token;
+    char *cmd_token, *cmd_dup;
 
     /* argv[0] */
     add_semihosting_arg(&semihosting, "arg", file, NULL);
 
     /* split -append and initialize argv[1..n] */
-    cmd_token = strtok(g_strdup(cmd), " ");
+    cmd_dup = g_strdup(cmd);
+    cmd_token = strtok(cmd_dup, " ");
     while (cmd_token) {
         add_semihosting_arg(&semihosting, "arg", cmd_token, NULL);
         cmd_token = strtok(NULL, " ");
     }
+    g_free(cmd_dup);
 }
 
 void qemu_semihosting_enable(void)
-- 
2.37.2