linux-kernel - [PATCH] ksmbd: Fix memory leak in get_file_all

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Message-Id: <20251224142016.250752-1-zilin@seu.edu.cn>
Date: Wed, 24 Dec 2025 14:20:16 +0000
From: Zilin Guan <zilin@....edu.cn>
To: linkinjeon@...nel.org
Cc: smfrench@...il.com,
	senozhatsky@...omium.org,
	tom@...pey.com,
	linux-cifs@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	jianhao.xu@....edu.cn,
	Zilin Guan <zilin@....edu.cn>
Subject: [PATCH] ksmbd: Fix memory leak in get_file_all_info()

In get_file_all_info(), if vfs_getattr() fails, the function returns
immediately without freeing the allocated filename, leading to a memory
leak.

Fix this by freeing the filename before returning in this error case.

Fixes: 5614c8c487f6a ("ksmbd: replace generic_fillattr with vfs_getattr")
Signed-off-by: Zilin Guan <zilin@....edu.cn>
---
 fs/smb/server/smb2pdu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 8aa483800014..4472638ab11a 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -4923,8 +4923,10 @@ static int get_file_all_info(struct ksmbd_work *work,
 
 	ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS,
 			  AT_STATX_SYNC_AS_STAT);
-	if (ret)
+	if (ret) {
+		kfree(filename);
 		return ret;
+	}
 
 	ksmbd_debug(SMB, "filename = %s\n", filename);
 	delete_pending = ksmbd_inode_pending_delete(fp);
-- 
2.34.1