Author: hiren Date: Sun Dec 11 23:36:11 2016 New Revision: 309859 URL: https://svnweb.freebsd.org/changeset/base/309859
Log: MFC r307745 In sendit(), if mp->msg_control is present, then in sockargs() we are allocating mbuf to store mp->msg_control. Later in kern_sendit(), call to getsock_cap(), will check validity of file pointer passed, if this fails EBADF is returned but mbuf allocated in sockargs() is not freed. Made code changes to free the same. Since freeing control mbuf in sendit() after checking (control != NULL) may lead to double freeing of control mbuf in sendit(), we can free control mbuf in kern_sendit() if there are any errors in the routine. Submitted by: Lohith Bellad <[email protected]> Modified: stable/11/sys/kern/uipc_syscalls.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/kern/uipc_syscalls.c ============================================================================== --- stable/11/sys/kern/uipc_syscalls.c Sun Dec 11 23:14:47 2016 (r309858) +++ stable/11/sys/kern/uipc_syscalls.c Sun Dec 11 23:36:11 2016 (r309859) @@ -806,8 +806,10 @@ kern_sendit(td, s, mp, flags, control, s cap_rights_set(&rights, CAP_CONNECT); } error = getsock_cap(td, s, &rights, &fp, NULL); - if (error != 0) + if (error != 0) { + m_freem(control); return (error); + } so = (struct socket *)fp->f_data; #ifdef KTRACE @@ -818,12 +820,16 @@ kern_sendit(td, s, mp, flags, control, s if (mp->msg_name != NULL) { error = mac_socket_check_connect(td->td_ucred, so, mp->msg_name); - if (error != 0) + if (error != 0) { + m_freem(control); goto bad; + } } error = mac_socket_check_send(td->td_ucred, so); - if (error != 0) + if (error != 0) { + m_freem(control); goto bad; + } #endif auio.uio_iov = mp->msg_iov; @@ -837,6 +843,7 @@ kern_sendit(td, s, mp, flags, control, s for (i = 0; i < mp->msg_iovlen; i++, iov++) { if ((auio.uio_resid += iov->iov_len) < 0) { error = EINVAL; + m_freem(control); goto bad; } } _______________________________________________ [email protected] mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "[email protected]"
