Hi stable maintainers,
On 06.04.21 03:47, Yoshio Furuyama wrote:
> From: "Doyle, Patrick" <pdoyle@xxxxxxxxxx>
>
> 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>
We have systems on which this patch fixes real failures. Could you
please add the upstream patch fd0d8d85f723 ("mtd: nand: bbt: Fix corner
case in bad block table handling") to the stable queues for 4.19, 5.4, 5.10?
Thanks!
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 9c3736a3de21 ("mtd: nand: Add core infrastructure to deal with
NAND devices")
> ---
> drivers/mtd/nand/bbt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/mtd/nand/bbt.c b/drivers/mtd/nand/bbt.c
> index 044adf913854..64af6898131d 100644
> --- a/drivers/mtd/nand/bbt.c
> +++ b/drivers/mtd/nand/bbt.c
> @@ -123,7 +123,7 @@ int nanddev_bbt_set_block_status(struct nand_device *nand, unsigned int entry,
> 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;
