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bcache: Fix moving_pred()

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Avoid a potential null pointer deref (e.g. from check keys for cache misses)

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
This commit is contained in:
Kent Overstreet
2014-02-17 15:48:36 -08:00
parent da415a096f
commit 10d9dcf6ee
1 changed files with 3 additions and 5 deletions
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8
drivers/md/bcache/movinggc.c
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@@ -24,12 +24,10 @@ static bool moving_pred(struct keybuf *buf, struct bkey *k)
moving_gc_keys);
unsigned i;
for (i = 0; i < KEY_PTRS(k); i++) {
struct bucket *g = PTR_BUCKET(c, k, i);
if (GC_MOVE(g))
for (i = 0; i < KEY_PTRS(k); i++)
if (ptr_available(c, k, i) &&
GC_MOVE(PTR_BUCKET(c, k, i)))
return true;
}
return false;
}