RE: [PATCH] block: add verifier for cmdline partition

[Caizhiyong]

> -----Original Message-----
> From: Wang YanQing [mailto:udknight@xxxxxxxxx]
> Sent: Thursday, May 03, 2018 7:18 PM
> To: axboe@xxxxxxxxx
> Cc: gregkh@xxxxxxxxxxxxxxxxxxx; pombredanne@xxxxxxxx;
> tglx@xxxxxxxxxxxxx; Caizhiyong <caizhiyong@xxxxxxxxxxxxx>; linux-
> block@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx
> Subject: [PATCH] block: add verifier for cmdline partition
> 
> I meet strange filesystem corruption issue recently, the reason
> is there are overlaps partitions in cmdline partition argument.
> 
> This patch add verifier for cmdline partition, then if there are
> overlaps partitions, cmdline_partition will return error and log
> a error message.
> 

Partition overlap was intentionally designed in this cmdline partition.
some time, the cmdline partition save raw data(not filesystem), the overlap makes data  access very convenient.

reference  http://lists.infradead.org/pipermail/linux-mtd/2013-August/048092.html

> Signed-off-by: Wang YanQing <udknight@xxxxxxxxx>
> ---
>  block/partitions/cmdline.c | 63
> +++++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 62 insertions(+), 1 deletion(-)
>