From: Vasiliy Kulikov <segooon@xxxxxxxxx>
Function read_sb_page may return ERR_PTR(...). Check for it.
Signed-off-by: Vasiliy Kulikov <segooon@xxxxxxxxx>
---
Compile tested.
drivers/md/bitmap.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index ed4900a..33531da 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -936,6 +936,7 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
int outofdate;
int ret = -ENOSPC;
void *paddr;
+ struct page *p;
chunks = bitmap->chunks;
file = bitmap->file;
@@ -999,11 +1000,16 @@ static int bitmap_init_from_disk(struct bitmap *bitmap, sector_t start)
*/
page = bitmap->sb_page;
offset = sizeof(bitmap_super_t);
- if (!file)
- read_sb_page(bitmap->mddev,
+ if (!file) {
+ p = read_sb_page(bitmap->mddev,
bitmap->mddev->bitmap_info.offset,
page,
index, count);
+ if (IS_ERR(p)) {
+ ret = PTR_ERR(p);
+ goto err;
+ }
+ }
} else if (file) {
page = read_page(file, index, bitmap, count);
offset = 0;
--
1.7.0.4
--
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