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Mon, 22 Sep 2025 23:40:58 -0700 (PDT) Received: from y740.local ([2401:4900:1f31:8167:ea30:c04b:15e8:3036]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-32ed268813bsm18141932a91.1.2025.09.22.23.40.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 22 Sep 2025 23:40:57 -0700 (PDT) From: Sidharth Seela To: almaz.alexandrovich@paragon-software.com Cc: ntfs3@lists.linux.dev, linux-kernel@vger.kernel.org, syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com, sidharthseela@gmail.com Subject: [PATCH v1] ntfs3: Fix uninit buffer allocated by __getname() Date: Tue, 23 Sep 2025 12:10:16 +0530 Message-ID: <20250923064015.178554-2-sidharthseela@gmail.com> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Fix uninit errors caused after buffer allocation given to 'de'; by initializing the buffer with zeroes. The fix was found by using KMSAN. Reported-by: syzbot+332bd4e9d148f11a87dc@syzkaller.appspotmail.com Fixes: 78ab59fee07f2 ("fs/ntfs3: Rework file operations") Signed-off-by: Sidharth Seela -- diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index 37cbbee7fa58..6b14c13bda68 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -1716,6 +1716,7 @@ int ntfs_link_inode(struct inode *inode, struct dentr= y *dentry) de =3D __getname(); if (!de) return -ENOMEM; + memset(de, 0, PATH_MAX); =20 /* Mark rw ntfs as dirty. It will be cleared at umount. */ ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); --=20 2.47.3