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| author | Kent Overstreet <kmo@daterainc.com> | 2014-02-24 19:55:28 -0800 |
|---|---|---|
| committer | Kent Overstreet <kmo@daterainc.com> | 2014-03-17 19:01:03 -0700 |
| commit | 65ddf45a3102916fb622c71f7af158b19d49dc7f (patch) | |
| tree | 2750fb8191169f39c5942cfce8b86a45d7f92281 /drivers/md/bcache/journal.c | |
| parent | 4fa03402cda2fac1a54248c7578b939d95931dc0 (diff) | |
| download | lwn-65ddf45a3102916fb622c71f7af158b19d49dc7f.tar.gz lwn-65ddf45a3102916fb622c71f7af158b19d49dc7f.zip | |
bcache: Fix a null ptr deref in journal replay
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Diffstat (limited to 'drivers/md/bcache/journal.c')
| -rw-r--r-- | drivers/md/bcache/journal.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c index e38c5997bf12..97e6a92da999 100644 --- a/drivers/md/bcache/journal.c +++ b/drivers/md/bcache/journal.c @@ -287,9 +287,13 @@ void bch_journal_mark(struct cache_set *c, struct list_head *list) k < bset_bkey_last(&i->j); k = bkey_next(k)) { unsigned j; + struct bucket *g; for (j = 0; j < KEY_PTRS(k); j++) { - struct bucket *g = PTR_BUCKET(c, k, j); + if (!ptr_available(c, k, j)) + continue; + + g = PTR_BUCKET(c, k, j); atomic_inc(&g->pin); if (g->prio == BTREE_PRIO && |