From: Kees Cook <keescook@xxxxxxxxxxxx>
Defensively check that the field to be worked on is not NULL.
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxx
---
drivers/hid/hid-core.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 55798b2..192be6b 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1206,7 +1206,12 @@ EXPORT_SYMBOL_GPL(hid_output_report);
int hid_set_field(struct hid_field *field, unsigned offset, __s32 value)
{
- unsigned size = field->report_size;
+ unsigned size;
+
+ if (!field)
+ return -1;
+
+ size = field->report_size;
hid_dump_input(field->report->device, field->usage + offset, value);
--
Jiri Kosina
SUSE Labs
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