From mboxrd@z Thu Jan 1 00:00:00 1970 From: Priya Bansal Subject: [PATCH] NULL pointer dereference in ecryptfs (ecryptfs_setxattr) Date: Wed, 24 Sep 2014 06:58:00 +0000 (GMT) Message-ID: <1630743052.107781411541880641.JavaMail.weblogic@epmlwas02d> Reply-To: p.bansal@samsung.com Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: base64 To: ecryptfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, p.bansal@samsung.com Return-path: MIME-version: 1.0 Sender: ecryptfs-owner@vger.kernel.org List-Id: linux-fsdevel.vger.kernel.org VGhpcyBwYXRjaCBmaXhlcyB0aGUgaXNzdWUgd2hpY2ggd2FzIGZvdW5kIGluCiBlY3J5cHRmc19z ZXR4YXR0cigpLiBQcmV2aW91c2x5LCB3aGlsZSB0cnlpbmcgdG8gY3JlYXRlIGEgZmlsZSB3aGVu IGVjcnlwdGZzCiBpcyBtb3VudGVkIG92ZXIgZXh0NCBmaWxlc3lzdGVtICB3aXRoICBlbmNyeXB0 ZWQgdmlldyBlbmFibGVkLCB0aGUga2VybmVsCiBjcmFzaGVzLiB0aGUgcmVhc29uIGJlaW5nIHRo ZSBmdW5jdGlvbiBmc3N0YWNrX2NvcHlfYXR0cl9hbGwgd2FzIHRyeWluZyB0bwogYWNjZXNzIGRl bnRyeS0+ZF9pbm9kZSB3aGljaCB3YXMgbnVsbCBoZW5jZSB0aGUga2VybmVsIGNyYXNoZXMgd2l0 aCBOVUxMCiBwb2ludGVyIGRlcmVmZXJlbmNlLiBOb3cgYSBjaGVjayBoYXMgYmVlbiBhcHBsaWVk IHdoaWNoIHByZXZlbnRzIHN1Y2gKIGNvbmRpdGlvbi4KCkZyb20gNzQ4NTY0NDU3NTZhYmExOGY5 OGFhNWI5OGFkNDZlN2Q5OGY1NDczNyBNb24gU2VwIDE3IDAwOjAwOjAwIDIwMDEKRnJvbTogUHJp eWEgQmFuc2FsIDxwLmJhbnNhbEBzYW1zdW5nLmNvbT4KRGF0ZTogRnJpLCAyOSBBdWcgMjAxNCAx MDoyNzoyNyArMDUzMApTdWJqZWN0OiBbUEFUQ0hdIEZpeCBpbiBlY3J5cHRmc19zZXR4YXR0ciBm b3IgTlVMTCBjaGVjayBiZWZvcmUgY2FsbGluZwogZnNzdGFja19jb3B5X2F0dHJfYWxsLiBUaGlz IHBhdGNoIGZpeGVzIHRoZSBpc3N1ZSB3aGljaCB3YXMgZm91bmQgaW4KIGVjcnlwdGZzX3NldHhh dHRyKCkuIFByZXZpb3VzbHksIHdoaWxlIHRyeWluZyB0byBjcmVhdGUgYSBmaWxlIHdoZW4gZWNy eXB0ZnMKIGlzIG1vdW50ZWQgb3ZlciBleHQ0IGZpbGVzeXN0ZW0gIHdpdGggIGVuY3J5cHRlZCB2 aWV3IGVuYWJsZWQsIHRoZSBrZXJuZWwKIGNyYXNoZXMuIHRoZSByZWFzb24gYmVpbmcgdGhlIGZ1 bmN0aW9uIGZzc3RhY2tfY29weV9hdHRyX2FsbCB3YXMgdHJ5aW5nIHRvCiBhY2Nlc3MgZGVudHJ5 LT5kX2lub2RlIHdoaWNoIHdhcyBudWxsIGhlbmNlIHRoZSBrZXJuZWwgY3Jhc2hlcyB3aXRoIE5V TEwKIHBvaW50ZXIgZGVyZWZlcmVuY2UuIE5vdyBhIGNoZWNrIGhhcyBiZWVuIGFwcGxpZWQgd2hp Y2ggcHJldmVudHMgc3VjaAogY29uZGl0aW9uLgpTaWduZWQtb2ZmLWJ5OiBQcml5YSBCYW5zYWwg PHAuYmFuc2FsQHNhbXN1bmcuY29tPgotLS0KIGxpbnV4LTMuMTYuMS9mcy9lY3J5cHRmcy9pbm9k ZS5jIHwgMTggKysrKysrKysrKysrKysrKy0tCiAxIGZpbGUgY2hhbmdlZCwgMTYgaW5zZXJ0aW9u cygrKSwgMiBkZWxldGlvbnMoLSkKZGlmZiAtLWdpdCBhL2xpbnV4LTMuMTYuMS9mcy9lY3J5cHRm cy9pbm9kZS5jIGIvbGludXgtMy4xNi4xL2ZzL2VjcnlwdGZzL2lub2RlLmMKaW5kZXggZDRhOTQz MS4uN2RhMDNlNSAxMDA2NDQKLS0tIGEvbGludXgtMy4xNi4xL2ZzL2VjcnlwdGZzL2lub2RlLmMK KysrIGIvbGludXgtMy4xNi4xL2ZzL2VjcnlwdGZzL2lub2RlLmMKQEAgLTEwMzEsNiArMTAzMSw4 IEBAIGVjcnlwdGZzX3NldHhhdHRyKHN0cnVjdCBkZW50cnkgKmRlbnRyeSwgY29uc3QgY2hhciAq bmFtZSwgY29uc3Qgdm9pZCAqdmFsdWUsCiB7CiAgaW50IHJjID0gMDsKICBzdHJ1Y3QgZGVudHJ5 ICpsb3dlcl9kZW50cnk7Cisgc3RydWN0IGVjcnlwdGZzX21vdW50X2NyeXB0X3N0YXQgKm1vdW50 X2NyeXB0X3N0YXQgPQorICAmZWNyeXB0ZnNfc3VwZXJibG9ja190b19wcml2YXRlKGRlbnRyeS0+ ZF9zYiktPm1vdW50X2NyeXB0X3N0YXQ7CiAKICBsb3dlcl9kZW50cnkgPSBlY3J5cHRmc19kZW50 cnlfdG9fbG93ZXIoZGVudHJ5KTsKICBpZiAoIWxvd2VyX2RlbnRyeS0+ZF9pbm9kZS0+aV9vcC0+ c2V0eGF0dHIpIHsKQEAgLTEwMzksOCArMTA0MSwyMCBAQCBlY3J5cHRmc19zZXR4YXR0cihzdHJ1 Y3QgZGVudHJ5ICpkZW50cnksIGNvbnN0IGNoYXIgKm5hbWUsIGNvbnN0IHZvaWQgKnZhbHVlLAog IH0KIAogIHJjID0gdmZzX3NldHhhdHRyKGxvd2VyX2RlbnRyeSwgbmFtZSwgdmFsdWUsIHNpemUs IGZsYWdzKTsKLSBpZiAoIXJjKQotICBmc3N0YWNrX2NvcHlfYXR0cl9hbGwoZGVudHJ5LT5kX2lu b2RlLCBsb3dlcl9kZW50cnktPmRfaW5vZGUpOworIGlmICghcmMpIHsKKyAgaWYgKGRlbnRyeS0+ ZF9pbm9kZSA9PSBOVUxMKSB7CisgICBpZiAobW91bnRfY3J5cHRfc3RhdC0+ZmxhZ3MKKyAgICAg JiBFQ1JZUFRGU19FTkNSWVBURURfVklFV19FTkFCTEVEKQorICAgIHJjID0gLUVQRVJNOworICAg ZWxzZSBpZiAobW91bnRfY3J5cHRfc3RhdC0+ZmxhZ3MKKyAgICAgJiBFQ1JZUFRGU19YQVRUUl9N RVRBREFUQV9FTkFCTEVEKQorICAgIGdvdG8gb3V0OworICB9IGVsc2UgeworICAgZnNzdGFja19j b3B5X2F0dHJfYWxsKGRlbnRyeS0+ZF9pbm9kZSwKKyAgICAgbG93ZXJfZGVudHJ5LT5kX2lub2Rl KTsKKyAgfQorIH0KKwogb3V0OgogIHJldHVybiByYzsKIH0KLS0gCjEuOC4zLjIKCklmIHlvdSBu ZWVkIGFueSBvdGhlciBkZXRhaWxzIHJlZ2FyZGluZyB0aGlzIGNvbnRyaWJ1dGlvbiwgcGxlYXNl IGNvbnRhY3QgbWUuICAKClRoYW5rcyAmIFJlZ2FyZHMgClByaXlhIEJhbnNhbC4gCkUtbWFpbDog cC5iYW5zYWxAc2Ftc3VuZy5jb20K