On Fri, 2019-09-27 at 06:20:02 UTC, Vaibhav Jain wrote:
> A validation check to prevent out of bounds read/write inside
> functions papr_scm_meta_{get,set}() is off-by-one that prevent reads
> and writes to the last byte of the label area.
>
> This bug manifests as a failure to probe a dimm when libnvdimm is
> unable to read the entire config-area as advertised by
> ND_CMD_GET_CONFIG_SIZE. This usually happens when there are large
> number of namespaces created in the region backed by the dimm and the
> label-index spans max possible config-area. An error of the form below
> usually reported in the kernel logs:
>
> [ 255.293912] nvdimm: probe of nmem0 failed with error -22
>
> The patch fixes these validation checks there by letting libnvdimm
> access the entire config-area.
>
> Fixes: 53e80bd042773('powerpc/nvdimm: Add support for multibyte read/write
> for metadata')
> Signed-off-by: Vaibhav Jain <vaib...@linux.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/612ee81b9461475b5a5612c2e8d71559dd3c7920
cheers
