b952d3fda3
- Return NULL instead of returning memory outside of the stackgap in stackgap_alloc() (FreeBSD-SA-00:42.linux) - Check for stackgap_alloc() returning NULL in ibcs2_emul_find(); other calls to stackgap_alloc() have not been changed since they are small fixed-size allocations. - Replace use of strcpy() with strlcpy() in exec_coff_imgact() to avoid buffer overflow - Use strlcat() instead of strcat() to avoid a one byte buffer overflow in ibcs2_setipdomainname() - Use copyinstr() instead of copyin() in ibcs2_setipdomainname() to ensure that the string is null-terminated - Avoid integer overflow in ibcs2_setgroups() and ibcs2_setgroups() by checking that gidsetsize argument is non-negative and no larger than NGROUPS_MAX. - Range-check signal numbers in ibcs2_wait(), ibcs2_sigaction(), ibcs2_sigsys() and ibcs2_kill() to avoid accessing array past the end (or before the start)
212 lines
5.9 KiB
C
212 lines
5.9 KiB
C
/*
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* Copyright (c) 1994, 1995 Scott Bartram
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* Copyright (c) 1994 Arne H Juul
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/sysproto.h>
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#include <sys/jail.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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#include <i386/ibcs2/ibcs2_socksys.h>
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#include <i386/ibcs2/ibcs2_util.h>
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/* Local structures */
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struct getipdomainname_args {
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char *ipdomainname;
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int len;
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};
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struct setipdomainname_args {
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char *ipdomainname;
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int len;
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};
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/* Local prototypes */
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static int ibcs2_getipdomainname(struct thread *,
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struct getipdomainname_args *);
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static int ibcs2_setipdomainname(struct thread *,
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struct setipdomainname_args *);
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/*
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* iBCS2 socksys calls.
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*/
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int
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ibcs2_socksys(td, uap)
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register struct thread *td;
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register struct ibcs2_socksys_args *uap;
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{
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int error;
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int realargs[7]; /* 1 for command, 6 for recvfrom */
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void *passargs;
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/*
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* SOCKET should only be legal on /dev/socksys.
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* GETIPDOMAINNAME should only be legal on /dev/socksys ?
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* The others are (and should be) only legal on sockets.
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*/
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if ((error = copyin(uap->argsp, (caddr_t)realargs, sizeof(realargs))) != 0)
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return error;
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DPRINTF(("ibcs2_socksys: %08x %08x %08x %08x %08x %08x %08x\n",
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realargs[0], realargs[1], realargs[2], realargs[3],
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realargs[4], realargs[5], realargs[6]));
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passargs = (void *)(realargs + 1);
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switch (realargs[0]) {
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case SOCKSYS_ACCEPT:
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return accept(td, passargs);
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case SOCKSYS_BIND:
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return bind(td, passargs);
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case SOCKSYS_CONNECT:
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return connect(td, passargs);
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case SOCKSYS_GETPEERNAME:
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return getpeername(td, passargs);
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case SOCKSYS_GETSOCKNAME:
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return getsockname(td, passargs);
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case SOCKSYS_GETSOCKOPT:
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return getsockopt(td, passargs);
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case SOCKSYS_LISTEN:
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return listen(td, passargs);
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case SOCKSYS_RECV:
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realargs[5] = realargs[6] = 0;
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/* FALLTHROUGH */
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case SOCKSYS_RECVFROM:
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return recvfrom(td, passargs);
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case SOCKSYS_SEND:
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realargs[5] = realargs[6] = 0;
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/* FALLTHROUGH */
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case SOCKSYS_SENDTO:
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return sendto(td, passargs);
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case SOCKSYS_SETSOCKOPT:
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return setsockopt(td, passargs);
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case SOCKSYS_SHUTDOWN:
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return shutdown(td, passargs);
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case SOCKSYS_SOCKET:
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return socket(td, passargs);
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case SOCKSYS_SELECT:
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return select(td, passargs);
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case SOCKSYS_GETIPDOMAIN:
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return ibcs2_getipdomainname(td, passargs);
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case SOCKSYS_SETIPDOMAIN:
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return ibcs2_setipdomainname(td, passargs);
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case SOCKSYS_ADJTIME:
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return adjtime(td, passargs);
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case SOCKSYS_SETREUID:
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return setreuid(td, passargs);
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case SOCKSYS_SETREGID:
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return setregid(td, passargs);
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case SOCKSYS_GETTIME:
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return gettimeofday(td, passargs);
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case SOCKSYS_SETTIME:
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return settimeofday(td, passargs);
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case SOCKSYS_GETITIMER:
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return getitimer(td, passargs);
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case SOCKSYS_SETITIMER:
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return setitimer(td, passargs);
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default:
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printf("socksys unknown %08x %08x %08x %08x %08x %08x %08x\n",
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realargs[0], realargs[1], realargs[2], realargs[3],
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realargs[4], realargs[5], realargs[6]);
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return EINVAL;
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}
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/* NOTREACHED */
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}
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/* ARGSUSED */
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static int
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ibcs2_getipdomainname(td, uap)
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struct thread *td;
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struct getipdomainname_args *uap;
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{
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char hname[MAXHOSTNAMELEN], *dptr;
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int len;
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/* Get the domain name */
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getcredhostname(td->td_ucred, hname, sizeof(hname));
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dptr = index(hname, '.');
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if ( dptr )
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dptr++;
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else
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/* Make it effectively an empty string */
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dptr = hname + strlen(hname);
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len = strlen(dptr) + 1;
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if ((u_int)uap->len > len + 1)
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uap->len = len + 1;
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return (copyout((caddr_t)dptr, (caddr_t)uap->ipdomainname, uap->len));
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}
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/* ARGSUSED */
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static int
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ibcs2_setipdomainname(td, uap)
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struct thread *td;
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struct setipdomainname_args *uap;
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{
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char hname[MAXHOSTNAMELEN], *ptr;
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int error, sctl[2], hlen;
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if ((error = suser(td)))
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return (error);
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/* W/out a hostname a domain-name is nonsense */
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if ( strlen(hostname) == 0 )
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return EINVAL;
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/* Get the host's unqualified name (strip off the domain) */
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snprintf(hname, sizeof(hname), "%s", hostname);
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ptr = index(hname, '.');
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if ( ptr != NULL ) {
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ptr++;
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*ptr = '\0';
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} else {
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if (strlcat(hname, ".", sizeof(hname)) >= sizeof(hname))
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return (EINVAL);
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}
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/* Set ptr to the end of the string so we can append to it */
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hlen = strlen(hname);
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ptr = hname + hlen;
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if ((u_int)uap->len > (sizeof (hname) - hlen - 1))
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return EINVAL;
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/* Append the ipdomain to the end */
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error = copyinstr((caddr_t)uap->ipdomainname, ptr, uap->len, NULL);
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if (error)
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return (error);
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/* 'sethostname' with the new information */
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sctl[0] = CTL_KERN;
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sctl[1] = KERN_HOSTNAME;
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hlen = strlen(hname) + 1;
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return (kernel_sysctl(td, sctl, 2, 0, 0, hname, hlen, 0));
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}
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