/*
 * Naive system call dropper built on seccomp_filter.
 *
 * Copyright (c) 2012 The Chromium OS Authors <chromium-os-dev@chromium.org>
 * Author: Will Drewry <wad@chromium.org>
 *
 * The code may be used by anyone for any purpose,
 * and can serve as a starting point for developing
 * applications using prctl(PR_SET_SECCOMP, 2, ...).
 *
 * When run, returns the specified errno for the specified
 * system call number against the given architecture.
 *
 */

#include <errno.h>
#include <linux/audit.h>
#include <linux/filter.h>
#include <linux/seccomp.h>
#include <linux/unistd.h>
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <sys/prctl.h>
#include <unistd.h>

static int install_filter(int nr, int arch, int error)
{
	struct sock_filter filter[] = {
		BPF_STMT(BPF_LD+BPF_W+BPF_ABS,
			 (offsetof(struct seccomp_data, arch))),
		BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, arch, 0, 3),
		BPF_STMT(BPF_LD+BPF_W+BPF_ABS,
			 (offsetof(struct seccomp_data, nr))),
		BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, nr, 0, 1),
		BPF_STMT(BPF_RET+BPF_K,
			 SECCOMP_RET_ERRNO|(error & SECCOMP_RET_DATA)),
		BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW),
	};
	struct sock_fprog prog = {
		.len = (unsigned short)(sizeof(filter)/sizeof(filter[0])),
		.filter = filter,
	};
	if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0)) {
		perror("prctl(NO_NEW_PRIVS)");
		return 1;
	}
	if (prctl(PR_SET_SECCOMP, 2, &prog)) {
		perror("prctl(PR_SET_SECCOMP)");
		return 1;
	}
	return 0;
}

int main(int argc, char **argv)
{
	if (argc < 5) {
		fprintf(stderr, "Usage:\n"
			"dropper <syscall_nr> <arch> <errno> <prog> [<args>]\n"
			"Hint:	AUDIT_ARCH_I386: 0x%X\n"
			"	AUDIT_ARCH_X86_64: 0x%X\n"
			"\n", AUDIT_ARCH_I386, AUDIT_ARCH_X86_64);
		return 1;
	}
	if (install_filter(strtol(argv[1], NULL, 0), strtol(argv[2], NULL, 0),
			   strtol(argv[3], NULL, 0)))
		return 1;
	execv(argv[4], &argv[4]);
	printf("Failed to execv\n");
	return 255;
}
'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/chipidea'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>chipidea</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='3f67790d2b7e322bcf363ec717085dd78c3ea7cd'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-03 13:46:38 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-03 13:46:38 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>3f67790d2b7e322bcf363ec717085dd78c3ea7cd</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>7be20232078a2e801ed93bcdb72f0d955dd9836f</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>drivers/usb/chipidea</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/chipidea?id=cd44691f7177b2c1e1509d1a17d9b198ebaa34eb'>cd44691f7177b2c1e1509d1a17d9b198ebaa34eb</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd&amp;id2=cd44691f7177b2c1e1509d1a17d9b198ebaa34eb'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/chipidea?id=206c4720092d2a24bfefc041b377e889a220ffbf'>206c4720092d2a24bfefc041b377e889a220ffbf</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/chipidea?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd&amp;id2=206c4720092d2a24bfefc041b377e889a220ffbf'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'regulator-fix-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator</div><div class='commit-msg'>Pull regulator fixes from Mark Brown:
 "Three changes here: two run of the mill driver specific fixes and a
  change from Mark Rutland which reverts some new device specific ACPI
  binding code which was added during the merge window as there are
  concerns about this sending the wrong signal about usage of regulators
  in ACPI systems"

* tag 'regulator-fix-v4.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: fixed: Revert support for ACPI interface
  regulator: axp20x: AXP806: Fix dcdcb being set instead of dcdce
  regulator: twl6030: fix range comparison, allowing vsel = 59
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=3f67790d2b7e322bcf363ec717085dd78c3ea7cd'>Diffstat</a> (limited to 'drivers/usb/chipidea')</div><table summary='diffstat' class='diffstat'>