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authorMatthew Wilcox <willy@infradead.org>2018-12-13 13:57:42 -0500
committerMatthew Wilcox <willy@infradead.org>2018-12-13 14:07:33 -0500
commit48483614de97c4f5219abeda630e62b2bebdce62 (patch)
treeefd9c5d74cf60cdd6ff5c5f618f74e6fffed0493 /lib/xarray.c
parent4f145cd66a1a76136ff5a03a99e37ba082715dc6 (diff)
downloadlinux-48483614de97c4f5219abeda630e62b2bebdce62.tar.bz2
XArray: Fix xa_alloc when id exceeds max
Specifying a starting ID greater than the maximum ID isn't something attempted very often, but it should fail. It was succeeding due to xas_find_marked() returning the wrong error state, so add tests for both xa_alloc() and xas_find_marked(). Fixes: b803b42823d0 ("xarray: Add XArray iterators") Signed-off-by: Matthew Wilcox <willy@infradead.org>
Diffstat (limited to 'lib/xarray.c')
-rw-r--r--lib/xarray.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/lib/xarray.c b/lib/xarray.c
index bbacca576593..5f3f9311de89 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -1131,7 +1131,7 @@ void *xas_find_marked(struct xa_state *xas, unsigned long max, xa_mark_t mark)
entry = xa_head(xas->xa);
xas->xa_node = NULL;
if (xas->xa_index > max_index(entry))
- goto bounds;
+ goto out;
if (!xa_is_node(entry)) {
if (xa_marked(xas->xa, mark))
return entry;
@@ -1180,11 +1180,9 @@ void *xas_find_marked(struct xa_state *xas, unsigned long max, xa_mark_t mark)
}
out:
- if (!max)
+ if (xas->xa_index > max)
goto max;
-bounds:
- xas->xa_node = XAS_BOUNDS;
- return NULL;
+ return set_bounds(xas);
max:
xas->xa_node = XAS_RESTART;
return NULL;