From: Thomas Weißschuh linux@weissschuh.net

The cell sysfs attribute should not provide more access to the nvmem data than the main attribute itself. For example if nvme_config::root_only was set, the cell attribute would still provide read access to everybody.

Mask out permissions not available on the main attribute.

Fixes: 0331c611949f ("nvmem: core: Expose cells through sysfs") Cc: stable@vger.kernel.org Signed-off-by: Thomas Weißschuh linux@weissschuh.net Signed-off-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org --- drivers/nvmem/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 1285300ed239..f8dd7eb40fbe 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -462,7 +462,7 @@ static int nvmem_populate_sysfs_cells(struct nvmem_device *nvmem) "%s@%x,%x", entry->name, entry->offset, entry->bit_offset); - attrs[i].attr.mode = 0444; + attrs[i].attr.mode = 0444 & nvmem_bin_attr_get_umode(nvmem); attrs[i].size = entry->bytes; attrs[i].read = &nvmem_cell_attr_read; attrs[i].private = entry;