[PATCH v2 02/10] common: bootargs: don't leave linux_bootargs dangling after free

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

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@pengutronix.de>
---
 common/bootargs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/common/bootargs.c b/common/bootargs.c
index 36528b8b5827..6373d9ccb1f7 100644
--- a/common/bootargs.c
+++ b/common/bootargs.c
@@ -32,6 +32,7 @@ const char *linux_bootargs_get(void)
 		return linux_bootargs;
 
 	free(linux_bootargs);
+	linux_bootargs = NULL;
 
 	bootargs = globalvar_get_match("linux.bootargs.", " ");
 	if (!strlen(bootargs)) {
-- 
2.47.3