Patch "UBI: fastmap: scrub PEB when bitflips are detected in a free PEB EC header" has been added to the 4.8-stable tree

Patch "UBI: fastmap: scrub PEB when bitflips are detected in a free PEB EC header" has been added to the 4.8-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    UBI: fastmap: scrub PEB when bitflips are detected in a free PEB EC header

to the 4.8-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ubi-fastmap-scrub-peb-when-bitflips-are-detected-in-a-free-peb-ec-header.patch
and it can be found in the queue-4.8 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ecbfa8eabae9cd73522d1d3d15869703c263d859 Mon Sep 17 00:00:00 2001
From: Boris Brezillon <boris.brezillon@free-electrons.com>
Date: Fri, 16 Sep 2016 16:59:12 +0200
Subject: UBI: fastmap: scrub PEB when bitflips are detected in a free PEB EC header

From: Boris Brezillon <boris.brezillon@free-electrons.com>

commit ecbfa8eabae9cd73522d1d3d15869703c263d859 upstream.

scan_pool() does not mark the PEB for scrubing when bitflips are
detected in the EC header of a free PEB (VID header region left to
0xff).
Make sure we scrub the PEB in this case.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Fixes: dbb7d2a88d2a ("UBI: Add fastmap core")
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/mtd/ubi/fastmap.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/mtd/ubi/fastmap.c
+++ b/drivers/mtd/ubi/fastmap.c
@@ -515,10 +515,11 @@ static int scan_pool(struct ubi_device *
 			unsigned long long ec = be64_to_cpu(ech->ec);
 			unmap_peb(ai, pnum);
 			dbg_bld("Adding PEB to free: %i", pnum);
+
 			if (err == UBI_IO_FF_BITFLIPS)
-				add_aeb(ai, free, pnum, ec, 1);
-			else
-				add_aeb(ai, free, pnum, ec, 0);
+				scrub = 1;
+
+			add_aeb(ai, free, pnum, ec, scrub);
 			continue;
 		} else if (err == 0 || err == UBI_IO_BITFLIPS) {
 			dbg_bld("Found non empty PEB:%i in pool", pnum);


Patches currently in stable-queue which might be from boris.brezillon@free-electrons.com are

queue-4.8/ubi-fastmap-scrub-peb-when-bitflips-are-detected-in-a-free-peb-ec-header.patch
queue-4.8/ubi-fastmap-fix-add_vol-return-value-test-in-ubi_attach_fastmap.patch