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| author | Mike Snitzer <snitzer@redhat.com> | 2012-05-12 01:43:12 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-05-12 01:43:12 +0100 |
| commit | 03aaae7cdc71bc306888440b1f569d463e917b6d (patch) | |
| tree | 0f26df484419ac7cfc73b0d13f94a4cf7b701781 /drivers | |
| parent | d48b97b403d23f6df0b990cee652bdf9a52337a3 (diff) | |
| download | linux-stable-03aaae7cdc71bc306888440b1f569d463e917b6d.tar.gz linux-stable-03aaae7cdc71bc306888440b1f569d463e917b6d.tar.bz2 linux-stable-03aaae7cdc71bc306888440b1f569d463e917b6d.zip | |
dm thin: reinstate missing mempool_free in cell_release_singleton
Fix a significant memory leak inadvertently introduced during
simplification of cell_release_singleton() in commit
6f94a4c45a6f744383f9f695dde019998db3df55 ("dm thin: fix stacked bi_next
usage").
A cell's hlist_del() must be accompanied by a mempool_free().
Use __cell_release() to do this, like before.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/md/dm-thin.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 213ae32a0fc4..301db0f45d3b 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -279,8 +279,10 @@ static void __cell_release(struct cell *cell, struct bio_list *inmates) hlist_del(&cell->list); - bio_list_add(inmates, cell->holder); - bio_list_merge(inmates, &cell->bios); + if (inmates) { + bio_list_add(inmates, cell->holder); + bio_list_merge(inmates, &cell->bios); + } mempool_free(cell, prison->cell_pool); } @@ -303,9 +305,10 @@ static void cell_release(struct cell *cell, struct bio_list *bios) */ static void __cell_release_singleton(struct cell *cell, struct bio *bio) { - hlist_del(&cell->list); BUG_ON(cell->holder != bio); BUG_ON(!bio_list_empty(&cell->bios)); + + __cell_release(cell, NULL); } static void cell_release_singleton(struct cell *cell, struct bio *bio) |