/*
 * This module emits "Hello, world" on printk when loaded.
 *
 * It is designed to be used for basic evaluation of the module loading
 * subsystem (for example when validating module signing/verification). It
 * lacks any extra dependencies, and will not normally be loaded by the
 * system unless explicitly requested by name.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/printk.h>

static int __init test_module_init(void)
{
	pr_warn("Hello, world\n");

	return 0;
}

module_init(test_module_init);

static void __exit test_module_exit(void)
{
	pr_warn("Goodbye\n");
}

module_exit(test_module_exit);

MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
MODULE_LICENSE("GPL");
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/include?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f'>include</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f'>net</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net/netns?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f'>netns</a>/<a href='/cgit.cgi/linux/net-next.git/log/include/net/netns/packet.h?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f'>packet.h</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/include/net/netns/packet.h?h=nds-private-remove&amp;id=5351fbb1bf1413f6024892093528280769ca852f&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
or</th><td>Jérôme Glisse &lt;jglisse@redhat.com&gt;</td><td class='right'>2016-04-19 09:07:50 -0400</td></tr>
<tr><th>committer</th><td>Alex Deucher &lt;alexander.deucher@amd.com&gt;</td><td class='right'>2016-04-21 20:03:46 -0400</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=b5dcec693f87cb8475f2291c0075b2422addd3d6'>b5dcec693f87cb8475f2291c0075b2422addd3d6</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=b5dcec693f87cb8475f2291c0075b2422addd3d6'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=b5dcec693f87cb8475f2291c0075b2422addd3d6'>25fbbd4667f947c03abb66632dc961d06523e54b</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=83c5cda2ccf40a7a7e4bb674321509b346e23d5a'>83c5cda2ccf40a7a7e4bb674321509b346e23d5a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=b5dcec693f87cb8475f2291c0075b2422addd3d6&amp;id2=83c5cda2ccf40a7a7e4bb674321509b346e23d5a'>diff</a>)</td></tr></table>
<div class='commit-subject'>drm/radeon: forbid mapping of userptr bo through radeon device file</div><div class='commit-msg'>Allowing userptr bo which are basicly a list of page from some vma
(so either anonymous page or file backed page) would lead to serious
corruption of kernel structures and counters (because we overwrite
the page-&gt;mapping field when mapping buffer).

This will already block if the buffer was populated before anyone does
try to mmap it because then TTM_PAGE_FLAG_SG would be set in in the
ttm_tt flags. But that flag is check before ttm_tt_populate in the ttm
vm fault handler.

So to be safe just add a check to verify_access() callback.

Reviewed-by: Christian König &lt;christian.koenig@amd.com&gt;
Signed-off-by: Jérôme Glisse &lt;jglisse@redhat.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Signed-off-by: Alex Deucher &lt;alexander.deucher@amd.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=b5dcec693f87cb8475f2291c0075b2422addd3d6'>Diffstat</a></div><table summary='diffstat' class='diffstat'>