6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ming-Hung Tsai <mtsai@xxxxxxxxxx>
[ Upstream commit 626f128ee9c4133b1cfce4be2b34a1508949370e ]
The cached block pointer in dm_array_cursor might be NULL if it reaches
an unreadable array block, or the array is empty. Therefore,
dm_array_cursor_end() should call dm_btree_cursor_end() unconditionally,
to prevent leaving unreleased btree blocks.
This fix can be verified using the "array_cursor/iterate/empty" test
in dm-unit:
dm-unit run /pdata/array_cursor/iterate/empty --kernel-dir <KERNEL_DIR>
Signed-off-by: Ming-Hung Tsai <mtsai@xxxxxxxxxx>
Fixes: fdd1315aa5f0 ("dm array: introduce cursor api")
Reviewed-by: Joe Thornber <thornber@xxxxxxxxxx>
Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/md/persistent-data/dm-array.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/md/persistent-data/dm-array.c b/drivers/md/persistent-data/dm-array.c
index de303ba33857..788a31cae187 100644
--- a/drivers/md/persistent-data/dm-array.c
+++ b/drivers/md/persistent-data/dm-array.c
@@ -960,10 +960,10 @@ EXPORT_SYMBOL_GPL(dm_array_cursor_begin);
void dm_array_cursor_end(struct dm_array_cursor *c)
{
- if (c->block) {
+ if (c->block)
unlock_ablock(c->info, c->block);
- dm_btree_cursor_end(&c->cursor);
- }
+
+ dm_btree_cursor_end(&c->cursor);
}
EXPORT_SYMBOL_GPL(dm_array_cursor_end);
--
2.39.5
