This is a note to let you know that I've just added the patch titled
mtd: nand: bbt: Fix corner case in bad block table handling
to the 4.19-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:
mtd-nand-bbt-fix-corner-case-in-bad-block-table-handling.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fd0d8d85f7230052e638a56d1bfea170c488e6bc Mon Sep 17 00:00:00 2001
From: "Doyle, Patrick" <pdoyle@xxxxxxxxxx>
Date: Tue, 6 Apr 2021 10:47:08 +0900
Subject: mtd: nand: bbt: Fix corner case in bad block table handling
From: Doyle, Patrick <pdoyle@xxxxxxxxxx>
commit fd0d8d85f7230052e638a56d1bfea170c488e6bc upstream.
In the unlikely event that both blocks 10 and 11 are marked as bad (on a
32 bit machine), then the process of marking block 10 as bad stomps on
cached entry for block 11. There are (of course) other examples.
Signed-off-by: Patrick Doyle <pdoyle@xxxxxxxxxx>
Reviewed-by: Richard Weinberger <richard@xxxxxx>
Signed-off-by: Yoshio Furuyama <ytc-mb-yfuruyama7@xxxxxxxxxx>
[<miquel.raynal@xxxxxxxxxxx>: Fixed the title]
Signed-off-by: Miquel Raynal <miquel.raynal@xxxxxxxxxxx>
Cc: Frieder Schrempf <frieder.schrempf@xxxxxxxxxx>
Link: https://lore.kernel.org/linux-mtd/774a92693f311e7de01e5935e720a179fb1b2468.1616635406.git.ytc-mb-yfuruyama7@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/mtd/nand/bbt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/nand/bbt.c
+++ b/drivers/mtd/nand/bbt.c
@@ -123,7 +123,7 @@ int nanddev_bbt_set_block_status(struct
unsigned int rbits = bits_per_block + offs - BITS_PER_LONG;
pos[1] &= ~GENMASK(rbits - 1, 0);
- pos[1] |= val >> rbits;
+ pos[1] |= val >> (bits_per_block - rbits);
}
return 0;
Patches currently in stable-queue which might be from pdoyle@xxxxxxxxxx are
queue-4.19/mtd-nand-bbt-fix-corner-case-in-bad-block-table-handling.patch
