From: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Weißschuh <linux@xxxxxxxxxxxxxx>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
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;
--
2.25.1
