[PATCH] ACPI: NFIT: limit string attribute write

From: Ben Dooks
Date: Tue Jul 11 2023 - 05:26:59 EST


If we're writing what could be an arbitrary sized string into an attribute
we should probably use sysfs_emit() just to be safe. Most of the other
attriubtes are some sort of integer so unlikely to be an issue so not
altered at this time.

Signed-off-by: Ben Dooks <ben.dooks@xxxxxxxxxxxxxxx>
---
v2:
- use sysfs_emit() instead of snprintf.
---
drivers/acpi/nfit/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 9213b426b125..d7e9d9cd16d2 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1579,7 +1579,7 @@ static ssize_t id_show(struct device *dev,
{
struct nfit_mem *nfit_mem = to_nfit_mem(dev);

- return sprintf(buf, "%s\n", nfit_mem->id);
+ return snprintf(buf, PAGE_SIZE, "%s\n", nfit_mem->id);
}
static DEVICE_ATTR_RO(id);

--
2.40.1