/*
 * Regression3
 * Description:
 * Helper radix_tree_iter_retry resets next_index to the current index.
 * In following radix_tree_next_slot current chunk size becomes zero.
 * This isn't checked and it tries to dereference null pointer in slot.
 *
 * Helper radix_tree_iter_resume reset slot to NULL and next_index to index + 1,
 * for tagger iteraction it also must reset cached tags in iterator to abort
 * next radix_tree_next_slot and go to slow-path into radix_tree_next_chunk.
 *
 * Running:
 * This test should run to completion immediately. The above bug would
 * cause it to segfault.
 *
 * Upstream commit:
 * Not yet
 */
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/radix-tree.h>
#include <stdlib.h>
#include <stdio.h>

#include "regression.h"

void regression3_test(void)
{
	RADIX_TREE(root, GFP_KERNEL);
	void *ptr0 = (void *)4ul;
	void *ptr = (void *)8ul;
	struct radix_tree_iter iter;
	void **slot;
	bool first;

	printf("running regression test 3 (should take milliseconds)\n");

	radix_tree_insert(&root, 0, ptr0);
	radix_tree_tag_set(&root, 0, 0);

	first = true;
	radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
		printf("tagged %ld %p\n", iter.index, *slot);
		if (first) {
			radix_tree_insert(&root, 1, ptr);
			radix_tree_tag_set(&root, 1, 0);
			first = false;
		}
		if (radix_tree_deref_retry(*slot)) {
			printf("retry at %ld\n", iter.index);
			slot = radix_tree_iter_retry(&iter);
			continue;
		}
	}
	radix_tree_delete(&root, 1);

	first = true;
	radix_tree_for_each_slot(slot, &root, &iter, 0) {
		printf("slot %ld %p\n", iter.index, *slot);
		if (first) {
			radix_tree_insert(&root, 1, ptr);
			first = false;
		}
		if (radix_tree_deref_retry(*slot)) {
			printk("retry at %ld\n", iter.index);
			slot = radix_tree_iter_retry(&iter);
			continue;
		}
	}
	radix_tree_delete(&root, 1);

	first = true;
	radix_tree_for_each_contig(slot, &root, &iter, 0) {
		printk("contig %ld %p\n", iter.index, *slot);
		if (first) {
			radix_tree_insert(&root, 1, ptr);
			first = false;
		}
		if (radix_tree_deref_retry(*slot)) {
			printk("retry at %ld\n", iter.index);
			slot = radix_tree_iter_retry(&iter);
			continue;
		}
	}

	radix_tree_for_each_slot(slot, &root, &iter, 0) {
		printf("slot %ld %p\n", iter.index, *slot);
		if (!iter.index) {
			printf("next at %ld\n", iter.index);
			slot = radix_tree_iter_resume(slot, &iter);
		}
	}

	radix_tree_for_each_contig(slot, &root, &iter, 0) {
		printf("contig %ld %p\n", iter.index, *slot);
		if (!iter.index) {
			printf("next at %ld\n", iter.index);
			slot = radix_tree_iter_resume(slot, &iter);
		}
	}

	radix_tree_tag_set(&root, 0, 0);
	radix_tree_tag_set(&root, 1, 0);
	radix_tree_for_each_tagged(slot, &root, &iter, 0, 0) {
		printf("tagged %ld %p\n", iter.index, *slot);
		if (!iter.index) {
			printf("next at %ld\n", iter.index);
			slot = radix_tree_iter_resume(slot, &iter);
		}
	}

	radix_tree_delete(&root, 0);
	radix_tree_delete(&root, 1);

	printf("regression test 3 passed\n");
}
f2ea4cd2bb8b'>svc.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'/><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'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-30 15:47:19 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/svc.c?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/net/sunrpc/svc.c?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>4078d3ae27d4ebb85bdcd4d84e9b9a4d059f22bb</a> /<a href='/cgit.cgi/linux/net-next.git/tree/net/sunrpc/svc.c?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>net/sunrpc/svc.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/svc.c?id=751321b3dd5040dc5be19bd23f985e80c914621a'>751321b3dd5040dc5be19bd23f985e80c914621a</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sunrpc/svc.c?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=751321b3dd5040dc5be19bd23f985e80c914621a'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/net/sunrpc/svc.c?id=54791b276b4000b307339f269d3bf7db877d536f'>54791b276b4000b307339f269d3bf7db877d536f</a> (<a href='/cgit.cgi/linux/net-next.git/diff/net/sunrpc/svc.c?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b&amp;id2=54791b276b4000b307339f269d3bf7db877d536f'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc</div><div class='commit-msg'>Pull sparc fixes from David Miller:
 "Several small bug fixes and tidies, along with a fix for non-resumable
  memory errors triggered by userspace"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
  sparc64: Handle PIO &amp; MEM non-resumable errors.
  sparc64: Zero pages on allocation for mondo and error queues.
  sparc: Fixed typo in sstate.c. Replaced panicing with panicking
  sparc: use symbolic names for tsb indexing
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f9a42e0d58cf0fe3d902e63d4582f2ea4cd2bb8b'>Diffstat</a> (limited to 'net/sunrpc/svc.c')</div><table summary='diffstat' class='diffstat'>