[PATCH RFT 9/9] common: bootargs: don't leave linux_bootargs dangling after free

[Ahmad Fatoum]

linux_bootargs_get() frees the cached command line before recomputing it,
but the early return taken when there are no bootargs leaves the static
pointer referencing the freed allocation, so the next call frees it a
second time.

Clear the pointer right after freeing it.

Fixes: ee4cab9e5874 ("booting: more flexible Linux bootargs generation")
Assisted-by: Claude:opus-5
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
 common/bootargs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/bootargs.c b/common/bootargs.c
index 710f74de9629..91e92e594876 100644
--- a/common/bootargs.c
+++ b/common/bootargs.c
@@ -30,6 +30,7 @@ const char *linux_bootargs_get(void)
 		return linux_bootargs;
 
 	free(linux_bootargs);
+	linux_bootargs = NULL;
 
 	bootargs = globalvar_get_match("linux.bootargs.", " ");
 	if (!*bootargs) {
-- 
2.47.3