| Message ID | 20230711093708.23692-1-ben.dooks@codethink.co.uk (mailing list archive) |
|---|---|
| State | Handled Elsewhere, archived |
| Headers | show |
| Series | [v2] ACPI: NFIT: limit string attribute write | expand |
On 7/11/23 02:37, Ben Dooks wrote: > 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@codethink.co.uk> > --- > 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); Doesn't look like you updated your patch with your new changes.... > } > static DEVICE_ATTR_RO(id); >
On 11/07/2023 16:28, Dave Jiang wrote: > > > On 7/11/23 02:37, Ben Dooks wrote: >> 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@codethink.co.uk> >> --- >> 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); > > Doesn't look like you updated your patch with your new changes.... Ooops, sorry about that. Will sort that for v2++
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);
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@codethink.co.uk> --- v2: - use sysfs_emit() instead of snprintf. --- drivers/acpi/nfit/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)