Dmitry V. Levin
b8eec608fa
Consistently treat operation argument of prctl/arch_prctl syscalls as int to match the kernel behaviour. * prctl.c (SYS_FUNC(prctl), SYS_FUNC(arch_prctl)): Assign 1st argument of syscalls to a variable of type unsigned int and use it in all subsequent checks and lookups.
337 lines
8.0 KiB
C
337 lines
8.0 KiB
C
/*
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* Copyright (c) 1994-1996 Rick Sladkey <jrs@world.std.com>
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* Copyright (c) 1996-2000 Wichert Akkerman <wichert@cistron.nl>
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* Copyright (c) 2005-2007 Roland McGrath <roland@redhat.com>
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* Copyright (c) 2008-2015 Dmitry V. Levin <ldv@altlinux.org>
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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. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. 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 "defs.h"
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#include <sys/prctl.h>
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#include "xlat/prctl_options.h"
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#include "xlat/pr_cap_ambient.h"
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#include "xlat/pr_mce_kill.h"
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#include "xlat/pr_mce_kill_policy.h"
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#include "xlat/pr_set_mm.h"
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#include "xlat/pr_tsc.h"
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#include "xlat/pr_unalign_flags.h"
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#ifndef TASK_COMM_LEN
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# define TASK_COMM_LEN 16
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#endif
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#ifdef HAVE_LINUX_SECCOMP_H
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# include <linux/seccomp.h>
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#endif
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#include "xlat/seccomp_mode.h"
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#ifdef HAVE_LINUX_SECUREBITS_H
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# include <linux/securebits.h>
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#endif
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#include "xlat/secbits.h"
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/* these constants are the same as in <linux/capability.h> */
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enum {
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#include "caps0.h"
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#include "caps1.h"
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};
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#include "xlat/cap.h"
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static void
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print_prctl_args(struct tcb *tcp, const unsigned int first)
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{
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unsigned int i;
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for (i = first; i < tcp->s_ent->nargs; ++i)
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tprintf(", %#lx", tcp->u_arg[i]);
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}
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SYS_FUNC(prctl)
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{
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const unsigned int option = tcp->u_arg[0];
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unsigned int i;
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if (entering(tcp))
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printxval(prctl_options, option, "PR_???");
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switch (option) {
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case PR_GET_DUMPABLE:
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case PR_GET_KEEPCAPS:
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case PR_GET_SECCOMP:
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case PR_GET_TIMERSLACK:
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case PR_GET_TIMING:
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return RVAL_DECODED;
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case PR_GET_CHILD_SUBREAPER:
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case PR_GET_ENDIAN:
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case PR_GET_FPEMU:
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case PR_GET_FPEXC:
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if (entering(tcp))
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tprints(", ");
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else
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printnum_int(tcp, tcp->u_arg[1], "%u");
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break;
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case PR_GET_NAME:
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if (entering(tcp))
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tprints(", ");
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else {
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if (syserror(tcp))
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printaddr(tcp->u_arg[1]);
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else
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printstr(tcp, tcp->u_arg[1], -1);
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}
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break;
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case PR_GET_PDEATHSIG:
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if (entering(tcp))
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tprints(", ");
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else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
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tprints("[");
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tprints(signame(i));
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tprints("]");
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}
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break;
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case PR_GET_SECUREBITS:
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if (entering(tcp))
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break;
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if (syserror(tcp) || tcp->u_rval == 0)
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return 0;
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tcp->auxstr = sprintflags("", secbits,
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(unsigned long) tcp->u_rval);
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return RVAL_STR;
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case PR_GET_TID_ADDRESS:
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if (entering(tcp))
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tprints(", ");
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else
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printnum_ptr(tcp, tcp->u_arg[1]);
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break;
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case PR_GET_TSC:
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if (entering(tcp))
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tprints(", ");
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else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
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tprints("[");
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printxval(pr_tsc, i, "PR_TSC_???");
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tprints("]");
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}
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break;
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case PR_GET_UNALIGN:
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if (entering(tcp))
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tprints(", ");
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else if (!umove_or_printaddr(tcp, tcp->u_arg[1], &i)) {
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tprints("[");
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printflags(pr_unalign_flags, i, "PR_UNALIGN_???");
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tprints("]");
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}
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break;
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/* PR_TASK_PERF_EVENTS_* take no arguments. */
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case PR_TASK_PERF_EVENTS_DISABLE:
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case PR_TASK_PERF_EVENTS_ENABLE:
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return RVAL_DECODED;
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case PR_SET_CHILD_SUBREAPER:
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case PR_SET_DUMPABLE:
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case PR_SET_ENDIAN:
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case PR_SET_FPEMU:
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case PR_SET_FPEXC:
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case PR_SET_KEEPCAPS:
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case PR_SET_TIMING:
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tprintf(", %lu", tcp->u_arg[1]);
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return RVAL_DECODED;
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case PR_CAPBSET_DROP:
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case PR_CAPBSET_READ:
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tprints(", ");
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printxval(cap, tcp->u_arg[1], "CAP_???");
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return RVAL_DECODED;
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case PR_CAP_AMBIENT:
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tprints(", ");
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printxval(pr_cap_ambient, tcp->u_arg[1], "PR_CAP_AMBIENT_???");
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switch (tcp->u_arg[1]) {
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case PR_CAP_AMBIENT_RAISE:
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case PR_CAP_AMBIENT_LOWER:
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case PR_CAP_AMBIENT_IS_SET:
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tprints(", ");
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printxval(cap, tcp->u_arg[2], "CAP_???");
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print_prctl_args(tcp, 3);
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break;
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default:
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print_prctl_args(tcp, 2);
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break;
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}
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return RVAL_DECODED;
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case PR_MCE_KILL:
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tprints(", ");
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printxval(pr_mce_kill, tcp->u_arg[1], "PR_MCE_KILL_???");
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tprints(", ");
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if (PR_MCE_KILL_SET == tcp->u_arg[1])
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printxval(pr_mce_kill_policy, tcp->u_arg[2],
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"PR_MCE_KILL_???");
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else
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tprintf("%#lx", tcp->u_arg[2]);
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print_prctl_args(tcp, 3);
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return RVAL_DECODED;
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case PR_SET_NAME:
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tprints(", ");
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printstr(tcp, tcp->u_arg[1], TASK_COMM_LEN);
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return RVAL_DECODED;
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#ifdef __ANDROID__
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# ifndef PR_SET_VMA_ANON_NAME
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# define PR_SET_VMA_ANON_NAME 0
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# endif
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case PR_SET_VMA:
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if (tcp->u_arg[1] == PR_SET_VMA_ANON_NAME) {
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tprintf(", PR_SET_VMA_ANON_NAME, %#lx", tcp->u_arg[2]);
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tprintf(", %lu, ", tcp->u_arg[3]);
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printstr(tcp, tcp->u_arg[4], -1);
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} else {
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/* There are no other sub-options now, but there
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* might be in future... */
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print_prctl_args(tcp, 1);
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}
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return RVAL_DECODED;
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#endif
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case PR_SET_MM:
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tprints(", ");
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printxval(pr_set_mm, tcp->u_arg[1], "PR_SET_MM_???");
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print_prctl_args(tcp, 2);
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return RVAL_DECODED;
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case PR_SET_PDEATHSIG:
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tprints(", ");
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if ((unsigned long) tcp->u_arg[1] > 128)
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tprintf("%lu", tcp->u_arg[1]);
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else
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tprints(signame(tcp->u_arg[1]));
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return RVAL_DECODED;
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case PR_SET_PTRACER:
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tprints(", ");
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if (tcp->u_arg[1] == -1)
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tprints("PR_SET_PTRACER_ANY");
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else
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tprintf("%lu", tcp->u_arg[1]);
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return RVAL_DECODED;
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case PR_SET_SECCOMP:
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tprints(", ");
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printxval(seccomp_mode, tcp->u_arg[1],
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"SECCOMP_MODE_???");
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if (SECCOMP_MODE_STRICT == tcp->u_arg[1])
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return RVAL_DECODED;
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if (SECCOMP_MODE_FILTER == tcp->u_arg[1]) {
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tprints(", ");
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print_seccomp_filter(tcp, tcp->u_arg[2]);
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return RVAL_DECODED;
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}
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print_prctl_args(tcp, 2);
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return RVAL_DECODED;
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case PR_SET_SECUREBITS:
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tprints(", ");
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printflags(secbits, tcp->u_arg[1], "SECBIT_???");
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return RVAL_DECODED;
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case PR_SET_TIMERSLACK:
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tprintf(", %ld", tcp->u_arg[1]);
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return RVAL_DECODED;
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case PR_SET_TSC:
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tprints(", ");
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printxval(pr_tsc, tcp->u_arg[1], "PR_TSC_???");
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return RVAL_DECODED;
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case PR_SET_UNALIGN:
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tprints(", ");
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printflags(pr_unalign_flags, tcp->u_arg[1], "PR_UNALIGN_???");
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return RVAL_DECODED;
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case PR_SET_NO_NEW_PRIVS:
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case PR_SET_THP_DISABLE:
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tprintf(", %lu", tcp->u_arg[1]);
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print_prctl_args(tcp, 2);
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return RVAL_DECODED;
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case PR_MCE_KILL_GET:
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if (entering(tcp)) {
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print_prctl_args(tcp, 1);
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return 0;
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}
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if (syserror(tcp))
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return 0;
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tcp->auxstr = xlookup(pr_mce_kill_policy,
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(unsigned long) tcp->u_rval);
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return tcp->auxstr ? RVAL_STR : RVAL_UDECIMAL;
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case PR_GET_NO_NEW_PRIVS:
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case PR_GET_THP_DISABLE:
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case PR_MPX_DISABLE_MANAGEMENT:
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case PR_MPX_ENABLE_MANAGEMENT:
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default:
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print_prctl_args(tcp, 1);
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return RVAL_DECODED;
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}
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return 0;
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}
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#if defined X86_64 || defined X32
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# include <asm/prctl.h>
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# include "xlat/archvals.h"
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SYS_FUNC(arch_prctl)
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{
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const unsigned int option = tcp->u_arg[0];
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if (entering(tcp))
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printxval(archvals, option, "ARCH_???");
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switch (option) {
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case ARCH_GET_GS:
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case ARCH_GET_FS:
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if (entering(tcp))
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tprints(", ");
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else
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printnum_ptr(tcp, tcp->u_arg[1]);
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return 0;
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}
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tprintf(", %#lx", tcp->u_arg[1]);
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return RVAL_DECODED;
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}
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#endif /* X86_64 || X32 */
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