From 3d90d2f4a018fe8cfd65068bc6350b6222be4852 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Tue, 18 Apr 2023 12:28:05 +0300
Subject: [PATCH] wifi: iwlwifi: fw: fix memory leak in debugfs
Git-commit: 3d90d2f4a018fe8cfd65068bc6350b6222be4852
Patch-mainline: v6.4-rc1
References: git-fixes

Fix a memory leak that occurs when reading the fw_info
file all the way, since we return NULL indicating no
more data, but don't free the status tracking object.

Fixes: 36dfe9ac6e8b ("iwlwifi: dump api version in yaml format")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230418122405.239e501b3b8d.I4268f87809ef91209cbcd748eee0863195e70fa2@changeid
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/net/wireless/intel/iwlwifi/fw/debugfs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
index 43e997283db0..607e07ed2477 100644
--- a/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
+++ b/drivers/net/wireless/intel/iwlwifi/fw/debugfs.c
@@ -317,8 +317,10 @@ static void *iwl_dbgfs_fw_info_seq_next(struct seq_file *seq,
 	const struct iwl_fw *fw = priv->fwrt->fw;
 
 	*pos = ++state->pos;
-	if (*pos >= fw->ucode_capa.n_cmd_versions)
+	if (*pos >= fw->ucode_capa.n_cmd_versions) {
+		kfree(state);
 		return NULL;
+	}
 
 	return state;
 }
-- 
2.35.3