linux-kernel - [PATCH] fs/ntfs3: fix memory leak in ntfs_fill

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Message-ID: <20251211135126.13965-1-almaz.alexandrovich@paragon-software.com>
Date: Thu, 11 Dec 2025 14:51:26 +0100
From: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
To: <ntfs3@...ts.linux.dev>
CC: <linux-kernel@...r.kernel.org>, <linux-fsdevel@...r.kernel.org>,
	Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
Subject: [PATCH] fs/ntfs3: fix memory leak in ntfs_fill_super()

ntfs_fill_super() assigns fc->fs_private to a newly allocated options
structure earlier in the mount path. At the end of a successful mount, the
code set fc->fs_private = NULL, which prevented the vfs from freeing this
memory during mount context cleanup. As a result, the options structure
was leaked.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@...agon-software.com>
---
 fs/ntfs3/super.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index a641d474c782..38d82e46171a 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -1252,7 +1252,6 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
 		}
 	}
 	sbi->options = options;
-	fc->fs_private = NULL;
 	sb->s_flags |= SB_NODIRATIME;
 	sb->s_magic = 0x7366746e; // "ntfs"
 	sb->s_op = &ntfs_sops;
-- 
2.43.0