From: Richard Weinberger <richard@xxxxxx>
This helps to detect cases where an user copies an UBI image to
another target with different bad blocks.
Signed-off-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Teresa Remmet <t.remmet@xxxxxxxxx>
---
drivers/mtd/ubi/fastmap.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/mtd/ubi/fastmap.c b/drivers/mtd/ubi/fastmap.c
index 4a8de1db407a..d60f89fdb369 100644
--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -908,6 +908,13 @@ int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai,
goto free_hdr;
}
+ if (i == 0 && pnum != fm_anchor) {
+ ubi_err(ubi, "Fastmap anchor PEB mismatch: PEB: %i vs. %i",
+ pnum, fm_anchor);
+ ret = UBI_BAD_FASTMAP;
+ goto free_hdr;
+ }
+
ret = ubi_io_read_ec_hdr(ubi, pnum, ech, 0);
if (ret && ret != UBI_IO_BITFLIPS) {
ubi_err(ubi, "unable to read fastmap block# %i EC (PEB: %i)",
--
2.7.4
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