From nobody Tue Jun 30 17:20:39 2026 X-Original-To: dev-commits-src-branches@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4gqVKN3qJGz6jY9x for ; Tue, 30 Jun 2026 17:20:40 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "YR1" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4gqVKN0LGxz3qX7 for ; Tue, 30 Jun 2026 17:20:40 +0000 (UTC) (envelope-from git@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1782840040; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wzfISqwffxiUxhDUfV5JnQltv5nwJAeAmY+vtfcWjyU=; b=ZzaDm43TtU1cfuxg3wX9yFWoU7+R4Pu5HtNwECtqb0G67fSqH9bHkTnuus7NWAgYMnAIFz Lj9TfQxMptOGHJGdkL/O9bJyXFhdoxlvkC14JJk7Kg5JZXI2bMuTBN/HDQyYZSXjo0taAC OGSdpFm4zegoXFLQVn7gx+tNW3x4/L2ooqBKmvoTlcgnPT4Fl+xHpWMkiDGPg7y+W0V9NZ j86nhmgzEXoHa+VLXHmqakgyCiZFRJdmCTBdXsoxfgv8AN4GDMhzKC0jWpVByVWoykYYnq Qd24aRHQn2HLYIaBDsX51bUQFQzrge3/UDt4S70UyCVxsEL/KUhzoztJ8MAwuQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1782840040; a=rsa-sha256; cv=none; b=kbLyiOfz11PePfYs2avxisLMOC/w/8vhiCsL/jn+6bdcO4VHSlHa6c0XBaHWfb2NTbBT0C 4VRB5cV3VQuA/Z1mHj1Kzwz5rUfmuXPrQmZhkPbLkgKWL3sjCbTZJRK7EAiniQ63QAZy4d WtwNWSB6eWxiwkOO13pYmAUVeMT2aC8eL84FKjAiuxq6II8WlGGVbcFHpA76Wipi+dz3nQ q+DGR0D1SlQ1j+MIQDoUxJxvhSa1GaaqfmMGtY+oL4qbMXolHJTmLifoaUbLApC1kfFmh1 Hbz46JWPkiSzrr1aNeuuGjKbsFVr29VN+nE9ZzuKUy85dO27HcHDysd55uXOWw== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1782840040; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=wzfISqwffxiUxhDUfV5JnQltv5nwJAeAmY+vtfcWjyU=; b=sPxDxJURaW5WtbROUcdlfxeVNoYLkA3QHR5HcBk9ZbT1dsxBh3oPqoyUydQ1b/AP13vHoh FumBUfXKm1CCCywKWFfog8SaIc+6vC0lMrwFpjSROybigrKO7TU+vhg56NbhVl4Wz+Yp1X OT5rRDoVzvf6S5ZDy9Gg0zErmfMMwgcqLb0ElVEZxkulgWPv8EhV8Na2vvPtrqPWRhyrOA 9q4Hc/jymPKhm7Ea8suJE31psBH5vpQhX4iP9ahFKfnX/NmiIfy4CNE39PBewnTiZogH0q u4nOn92vReOvXgCVZZubIC4/Fd5bKUKVcrThtOJzvalPHLsBr9aDBwJf1PUExA== Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) by mxrelay.nyi.freebsd.org (Postfix) with ESMTP id 4gqVKM6WmcztVM for ; Tue, 30 Jun 2026 17:20:39 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from git (uid 1279) (envelope-from git@FreeBSD.org) id 44f61 by gitrepo.freebsd.org (DragonFly Mail Agent v0.13+ on gitrepo.freebsd.org); Tue, 30 Jun 2026 17:20:39 +0000 To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Cc: John Baldwin From: Mark Johnston Subject: git: f769a69b2da3 - releng/14.3 - ktls CBC decrypt: Only increment iovec index when an entry is used List-Id: Commits to the stable branches of the FreeBSD src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-branches List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: dev-commits-src-branches@freebsd.org Sender: owner-dev-commits-src-branches@FreeBSD.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: markj X-Git-Repository: src X-Git-Refname: refs/heads/releng/14.3 X-Git-Reftype: branch X-Git-Commit: f769a69b2da3850d320431605fecf9c4910dac9b Auto-Submitted: auto-generated Date: Tue, 30 Jun 2026 17:20:39 +0000 Message-Id: <6a43fae7.44f61.2c3e5a79@gitrepo.freebsd.org> The branch releng/14.3 has been updated by markj: URL: https://cgit.FreeBSD.org/src/commit/?id=f769a69b2da3850d320431605fecf9c4910dac9b commit f769a69b2da3850d320431605fecf9c4910dac9b Author: John Baldwin AuthorDate: 2026-06-24 01:14:11 +0000 Commit: Mark Johnston CommitDate: 2026-06-30 02:32:02 +0000 ktls CBC decrypt: Only increment iovec index when an entry is used If an mbuf in the chain was skipped because it only contained bytes from the header, the iovec index ('i') was incremented even though the entry was not populated. Only increment 'i' when an iovec entry is consumed. Add a new type of KTLS receive test which writes a single TLS record via two separate write(2) calls over a TCP_NODELAY socket to trigger a split in the mbuf chain in the kernel. Test various split locations including after the "plain" TLS header (5 bytes), after the full TLS header, in the middle of the data payload, just before the start of the trailer, and in the middle of the trailer. These tests are also run against all supported ciphers, not just CBC. The 'header' test for CBC ciphersuites was able to trigger the bug. Approved by: so Security: FreeBSD-SA-26:46.ktls Security: CVE-2026-49423 Sponsored by: Chelsio Communications --- sys/opencrypto/ktls_ocf.c | 3 +- tests/sys/kern/ktls_test.c | 110 ++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 110 insertions(+), 3 deletions(-) diff --git a/sys/opencrypto/ktls_ocf.c b/sys/opencrypto/ktls_ocf.c index f61fb7f73b5d..3c8b2e4f4589 100644 --- a/sys/opencrypto/ktls_ocf.c +++ b/sys/opencrypto/ktls_ocf.c @@ -503,13 +503,14 @@ ktls_ocf_tls_cbc_decrypt(struct ktls_session *tls, iov[0].iov_base = &ad; iov[0].iov_len = sizeof(ad); skip = sizeof(*hdr) + AES_BLOCK_LEN; - for (i = 1, n = m; n != NULL; i++, n = n->m_next) { + for (i = 1, n = m; n != NULL; n = n->m_next) { if (n->m_len < skip) { skip -= n->m_len; continue; } iov[i].iov_base = mtod(n, char *) + skip; iov[i].iov_len = n->m_len - skip; + i++; skip = 0; } uio.uio_iov = iov; diff --git a/tests/sys/kern/ktls_test.c b/tests/sys/kern/ktls_test.c index 3970083e7f72..7003b86fb4e2 100644 --- a/tests/sys/kern/ktls_test.c +++ b/tests/sys/kern/ktls_test.c @@ -303,6 +303,15 @@ fd_set_blocking(int fd) ATF_REQUIRE(fcntl(fd, F_SETFL, flags) != -1); } +static void +tcp_nodelay(int fd) +{ + int nodelay = 1; + + ATF_REQUIRE(setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &nodelay, + sizeof(nodelay)) == 0); +} + static bool cbc_crypt(const EVP_CIPHER *cipher, const char *key, const char *iv, const char *input, char *output, size_t size, int enc) @@ -1920,6 +1929,55 @@ test_ktls_receive_bad_size(const atf_tc_t *tc, struct tls_enable *en, close_sockets_ignore_errors(sockets); } +static void +test_ktls_receive_split_record(const atf_tc_t *tc, struct tls_enable *en, + uint64_t seqno, size_t len, size_t first_len) +{ + char *plaintext, *received, *outbuf; + size_t outbuf_cap, outbuf_len; + ssize_t rv; + int sockets[2]; + + ATF_REQUIRE(len <= TLS_MAX_MSG_SIZE_V10_2); + + plaintext = alloc_buffer(len); + received = malloc(len); + outbuf_cap = tls_header_len(en) + len + tls_trailer_len(en); + outbuf = malloc(outbuf_cap); + + ATF_REQUIRE_MSG(open_sockets(tc, sockets), "failed to create sockets"); + + ATF_REQUIRE(setsockopt(sockets[0], IPPROTO_TCP, TCP_RXTLS_ENABLE, en, + sizeof(*en)) == 0); + check_tls_mode(tc, sockets[0], TCP_RXTLS_MODE); + + fd_set_blocking(sockets[0]); + fd_set_blocking(sockets[1]); + + outbuf_len = encrypt_tls_record(tc, en, TLS_RLTYPE_APP, seqno, + plaintext, len, outbuf, outbuf_cap, 0); + ATF_REQUIRE(first_len < outbuf_len); + + tcp_nodelay(sockets[1]); + rv = write(sockets[1], outbuf, first_len); + ATF_REQUIRE_INTEQ((ssize_t)(first_len), rv); + + rv = write(sockets[1], outbuf + first_len, outbuf_len - first_len); + ATF_REQUIRE_INTEQ((ssize_t)(outbuf_len - first_len), rv); + + rv = ktls_receive_tls_record(en, sockets[0], TLS_RLTYPE_APP, received, + len); + ATF_REQUIRE_INTEQ((ssize_t)len, rv); + + ATF_REQUIRE(memcmp(plaintext, received, len) == 0); + + free(outbuf); + free(received); + free(plaintext); + + close_sockets(sockets); +} + #define TLS_10_TESTS(M) \ M(aes128_cbc_1_0_sha1, CRYPTO_AES_CBC, 128 / 8, \ CRYPTO_SHA1_HMAC, TLS_MINOR_VER_ZERO) \ @@ -2360,6 +2418,26 @@ ATF_TC_BODY(ktls_receive_##cipher_name##_##name, tc) \ auth_alg, minor, name) \ ATF_TP_ADD_TC(tp, ktls_receive_##cipher_name##_##name); +#define GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, name, len, first_len) \ +ATF_TC_WITHOUT_HEAD(ktls_receive_##cipher_name##_split_##name); \ +ATF_TC_BODY(ktls_receive_##cipher_name##_split_##name, tc) \ +{ \ + struct tls_enable en; \ + uint64_t seqno; \ + \ + ATF_REQUIRE_KTLS(); \ + seqno = random(); \ + build_tls_enable(tc, cipher_alg, key_size, auth_alg, minor, \ + seqno, &en); \ + test_ktls_receive_split_record(tc, &en, seqno, len, first_len); \ + free_tls_enable(&en); \ +} + +#define ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, name) \ + ATF_TP_ADD_TC(tp, ktls_receive_##cipher_name##_split_##name); + #define GEN_RECEIVE_TESTS(cipher_name, cipher_alg, key_size, auth_alg, \ minor) \ GEN_RECEIVE_APP_DATA_TEST(cipher_name, cipher_alg, key_size, \ @@ -2381,7 +2459,22 @@ ATF_TC_BODY(ktls_receive_##cipher_name##_##name, tc) \ tls_minimum_record_payload(&en) - 1) \ GEN_RECEIVE_BAD_SIZE_TEST(cipher_name, cipher_alg, key_size, \ auth_alg, minor, oversized_record, \ - TLS_MAX_MSG_SIZE_V10_2 * 2) + TLS_MAX_MSG_SIZE_V10_2 * 2) \ + GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, header, 64, \ + sizeof(struct tls_record_layer)); \ + GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, full_header, 64, \ + tls_header_len(&en)); \ + GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, half, 64, \ + tls_header_len(&en) + 32); \ + GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, trailer_start, 64, \ + tls_header_len(&en) + 64); \ + GEN_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, trailer_middle, 64, \ + tls_header_len(&en) + 64 + tls_trailer_len(&en) / 2); #define ADD_RECEIVE_TESTS(cipher_name, cipher_alg, key_size, auth_alg, \ minor) \ @@ -2402,7 +2495,17 @@ ATF_TC_BODY(ktls_receive_##cipher_name##_##name, tc) \ ADD_RECEIVE_BAD_SIZE_TEST(cipher_name, cipher_alg, key_size, \ auth_alg, minor, small_record) \ ADD_RECEIVE_BAD_SIZE_TEST(cipher_name, cipher_alg, key_size, \ - auth_alg, minor, oversized_record) + auth_alg, minor, oversized_record) \ + ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, header) \ + ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, full_header) \ + ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, half) \ + ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, trailer_start) \ + ADD_RECEIVE_SPLIT_RECORD_TEST(cipher_name, cipher_alg, \ + key_size, auth_alg, minor, trailer_middle) \ /* * For each supported cipher suite, run several receive tests: @@ -2425,6 +2528,9 @@ ATF_TC_BODY(ktls_receive_##cipher_name##_##name, tc) \ * size * * - a test with an oversized TLS record + * + * - tests of a single record whose data is split across two writes, + * with each test using a different split point */ AES_CBC_NONZERO_TESTS(GEN_RECEIVE_TESTS); AES_GCM_TESTS(GEN_RECEIVE_TESTS);