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96 lines
2.4 KiB
96 lines
2.4 KiB
/* $OpenBSD: sandbox-rlimit.c,v 1.4 2016/09/12 01:22:38 deraadt Exp $ */ |
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/* |
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* Copyright (c) 2011 Damien Miller <djm@mindrot.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include "includes.h" |
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#ifdef SANDBOX_RLIMIT |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/resource.h> |
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#include <errno.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include "log.h" |
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#include "ssh-sandbox.h" |
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#include "xmalloc.h" |
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/* Minimal sandbox that sets zero nfiles, nprocs and filesize rlimits */ |
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struct ssh_sandbox { |
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pid_t child_pid; |
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}; |
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struct ssh_sandbox * |
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ssh_sandbox_init(struct monitor *monitor) |
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{ |
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struct ssh_sandbox *box; |
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/* |
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* Strictly, we don't need to maintain any state here but we need |
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* to return non-NULL to satisfy the API. |
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*/ |
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debug3("%s: preparing rlimit sandbox", __func__); |
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box = xcalloc(1, sizeof(*box)); |
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box->child_pid = 0; |
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return box; |
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} |
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void |
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ssh_sandbox_child(struct ssh_sandbox *box) |
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{ |
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struct rlimit rl_zero; |
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rl_zero.rlim_cur = rl_zero.rlim_max = 0; |
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#ifndef SANDBOX_SKIP_RLIMIT_FSIZE |
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if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1) |
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fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s", |
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__func__, strerror(errno)); |
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#endif |
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#ifndef SANDBOX_SKIP_RLIMIT_NOFILE |
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if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1) |
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fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s", |
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__func__, strerror(errno)); |
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#endif |
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#ifdef HAVE_RLIMIT_NPROC |
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if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1) |
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fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s", |
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__func__, strerror(errno)); |
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#endif |
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} |
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void |
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ssh_sandbox_parent_finish(struct ssh_sandbox *box) |
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{ |
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free(box); |
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debug3("%s: finished", __func__); |
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} |
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void |
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ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid) |
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{ |
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box->child_pid = child_pid; |
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} |
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#endif /* SANDBOX_RLIMIT */
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