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Harmening" To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r346019 - stable/12/sys/compat/freebsd32 X-SVN-Group: stable-12 X-SVN-Commit-Author: jah X-SVN-Commit-Paths: stable/12/sys/compat/freebsd32 X-SVN-Commit-Revision: 346019 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk X-Loop: FreeBSD.org Sender: owner-src-committers@freebsd.org X-Rspamd-Queue-Id: 390336D9C3 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[freebsd.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.96)[-0.956,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-1.000,0] Status: O X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Date: Tue, 03 Sep 2019 14:06:27 -0000 X-Original-Date: Sun, 7 Apr 2019 19:02:33 +0000 (UTC) X-List-Received-Date: Tue, 03 Sep 2019 14:06:27 -0000 Author: jah Date: Sun Apr 7 19:02:33 2019 New Revision: 346019 URL: https://svnweb.freebsd.org/changeset/base/346019 Log: MFC r345741: freebsd32: fix padding of computed control message length for recvmsg() Each control message region must be aligned on a 4-byte boundary on 32-bit architectures. The 32-bit compat shim for recvmsg() gets the actual layout right, but doesn't pad the payload length when computing msg_controllen for the output message header. If a control message contains an unaligned payload, such as the 1-byte TTL field in the example attached to PR 236737, this can produce control message payload boundaries that extend beyond the boundary reported by msg_controllen. PR: 236737 Modified: stable/12/sys/compat/freebsd32/freebsd32_misc.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/compat/freebsd32/freebsd32_misc.c ============================================================================== --- stable/12/sys/compat/freebsd32/freebsd32_misc.c Sun Apr 7 18:39:55 2019 (r346018) +++ stable/12/sys/compat/freebsd32/freebsd32_misc.c Sun Apr 7 19:02:33 2019 (r346019) @@ -1183,8 +1183,8 @@ freebsd32_copy_msg_out(struct msghdr *msg, struct mbuf cm = NULL; } - msg->msg_controllen += FREEBSD32_ALIGN(sizeof(*cm)) + - datalen_out; + msg->msg_controllen += + FREEBSD32_CMSG_SPACE(datalen_out); } } if (len == 0 && m != NULL) {