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Sat, 16 Sep 2023 10:59:01 -0700 (PDT) X-Received: by 2002:a17:902:b284:b0:1c0:953d:58 with SMTP id u4-20020a170902b28400b001c0953d0058mr4864503plr.0.1694887140831; Sat, 16 Sep 2023 10:59:00 -0700 (PDT) Received: from kernel-devel.local ([240d:1a:c0d:9f00:245e:16ff:fe87:c960]) by smtp.gmail.com with ESMTPSA id jw16-20020a170903279000b001b016313b1dsm5345546plb.86.2023.09.16.10.58.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 16 Sep 2023 10:59:00 -0700 (PDT) From: Shigeru Yoshida To: almaz.alexandrovich@paragon-software.com Cc: ntfs3@lists.linux.dev, linux-kernel@vger.kernel.org, Shigeru Yoshida , syzbot+9ccdd15480e9d9833822@syzkaller.appspotmail.com Subject: [PATCH] fs/ntfs3: Fix memory leak in ntfs_fill_super() Date: Sun, 17 Sep 2023 02:58:52 +0900 Message-ID: <20230916175852.1607269-1-syoshida@redhat.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H4,RCVD_IN_MSPIKE_WL, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Sat, 16 Sep 2023 11:01:44 -0700 (PDT) syzbot reported memory leak in ntfs_fill_super(). ntfs_fill_super() calls wnd_init() and this allocates memory. So, we need to free those memory on the error handling path in ntfs_fill_super(). Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Reported-and-tested-by: syzbot+9ccdd15480e9d9833822@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=9ccdd15480e9d9833822 Signed-off-by: Shigeru Yoshida --- fs/ntfs3/super.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index cfec5e0c7f66..a9610f5f4cc0 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -1563,6 +1563,13 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) iput(inode); out: kfree(boot2); + + if (sbi->mft.bitmap.inited) + wnd_close(&sbi->mft.bitmap); + + if (sbi->used.bitmap.inited) + wnd_close(&sbi->used.bitmap); + return err; } -- 2.41.0