/*
 * 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;
}
ds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/dt-bindings'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>dt-bindings</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='2ad5d52d42810bed95100a3d912679d8864421ec'/><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>Helge Deller &lt;deller@gmx.de&gt;</td><td class='right'>2017-01-28 11:52:02 +0100</td></tr>
<tr><th>committer</th><td>Helge Deller &lt;deller@gmx.de&gt;</td><td class='right'>2017-01-28 21:54:23 +0100</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>2ad5d52d42810bed95100a3d912679d8864421ec</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/dt-bindings?id=2ad5d52d42810bed95100a3d912679d8864421ec'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>7f93e2f906b1c86f5b76c0f4c0978d41a8a29861</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>include/dt-bindings</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/dt-bindings?h=nds-private-remove&amp;id=83b5d1e3d3013dbf90645a5d07179d018c8243fa'>83b5d1e3d3013dbf90645a5d07179d018c8243fa</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/dt-bindings?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec&amp;id2=83b5d1e3d3013dbf90645a5d07179d018c8243fa'>diff</a>)</td></tr></table>
<div class='commit-subject'>parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header</div><div class='commit-msg'>In swab.h the "#if BITS_PER_LONG &gt; 32" breaks compiling userspace programs if
BITS_PER_LONG is #defined by userspace with the sizeof() compiler builtin.

Solve this problem by using __BITS_PER_LONG instead.  Since we now
#include asm/bitsperlong.h avoid further potential userspace pollution
by moving the #define of SHIFT_PER_LONG to bitops.h which is not
exported to userspace.

This patch unbreaks compiling qemu on hppa/parisc.

Signed-off-by: Helge Deller &lt;deller@gmx.de&gt;
Cc: &lt;stable@vger.kernel.org&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=2ad5d52d42810bed95100a3d912679d8864421ec'>Diffstat</a> (limited to 'include/dt-bindings')</div><table summary='diffstat' class='diffstat'>