[PATCH v2] kdb: fix memory leak in kdb_setenv() when environment is full

[Naveen Kumar Chaudhary]

When kdb_setenv() fails to find a free slot in __env[], the function
returns KDB_ENVFULL without freeing the previously allocated string
buffer 'ep', leaking memory on every failed call.

Add the missing kfree(ep) before returning KDB_ENVFULL.

Fixes: a30d4ff8193e ("kdb: remove usage of static environment buffer")
Signed-off-by: Naveen Kumar Chaudhary <naveen.osdev@xxxxxxxxx>
---
 kernel/debug/kdb/kdb_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c
index ddce56b47b25..31abaea5454e 100644
--- a/kernel/debug/kdb/kdb_main.c
+++ b/kernel/debug/kdb/kdb_main.c
@@ -338,6 +338,7 @@ static int kdb_setenv(const char *var, const char *val)
 		}
 	}
 
+	kfree(ep);
 	return KDB_ENVFULL;
 }
 
-- 
2.43.0