| Message ID | 20240713154001.107439-1-marex@denx.de |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | nvmem: core: Check read_only flag for force_ro in bin_attr_nvmem_write() | expand |
On 7/13/24 5:39 PM, Marek Vasut wrote: > The bin_attr_nvmem_write() must check the read_only flag and block > writes on read-only devices, now that a nvmem device can be switched > between read-write and read-only mode at runtime using the force_ro > attribute. Add the missing check. > > Fixes: 9d7eb234ac7a ("nvmem: core: Implement force_ro sysfs attribute") > Signed-off-by: Marek Vasut <marex@denx.de> > --- > Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > Cc: linux-kernel@vger.kernel.org It seems this bugfix is not even in next, any news ?
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c index 516dfd861b9f9..9cfe7d4bcda39 100644 --- a/drivers/nvmem/core.c +++ b/drivers/nvmem/core.c @@ -267,7 +267,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj, count = round_down(count, nvmem->word_size); - if (!nvmem->reg_write) + if (!nvmem->reg_write || nvmem->read_only) return -EPERM; rc = nvmem_reg_write(nvmem, pos, buf, count);
The bin_attr_nvmem_write() must check the read_only flag and block writes on read-only devices, now that a nvmem device can be switched between read-write and read-only mode at runtime using the force_ro attribute. Add the missing check. Fixes: 9d7eb234ac7a ("nvmem: core: Implement force_ro sysfs attribute") Signed-off-by: Marek Vasut <marex@denx.de> --- Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: linux-kernel@vger.kernel.org --- drivers/nvmem/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)