From: Tanya Brokhman <tlinder@xxxxxxxxxxxxxx>
In case of an error (if there are not free PEB's for example),
__wl_get_peb will return a negative value. In order to prevent access
violation we need to test the returned value prior to using it later on.
Signed-off-by: Tatyana Brokhman <tlinder@xxxxxxxxxxxxxx>
Reviewed-by: Dolev Raviv <draviv@xxxxxxxxxxxxxx>
Acked-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@xxxxxxxxxxxxxxx>
---
drivers/mtd/ubi/wl.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c
index c083cac..4ecbe18 100644
--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -646,6 +646,9 @@ int ubi_wl_get_peb(struct ubi_device *ubi)
peb = __wl_get_peb(ubi);
+ if (peb < 0)
+ return peb;
+
err = ubi_self_check_all_ff(ubi, peb, ubi->vid_hdr_aloffset,
ubi->peb_size - ubi->vid_hdr_aloffset);
if (err) {
--
2.1.0
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