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HID: check for NULL field when setting values 

Defensively check that the field to be worked on is not NULL.

Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@kernel.org
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Kees Cook 2013-08-28 22:32:01 +02:00 committed by Jiri Kosina
parent 1e87a2456b
commit be67b68d52
1 changed files with 6 additions and 1 deletions
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7
drivers/hid/hid-core.c
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@ -1169,7 +1169,12 @@ EXPORT_SYMBOL_GPL(hid_alloc_report_buf);
int hid_set_field(struct hid_field *field, unsigned offset, __s32 value) 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); hid_dump_input(field->report->device, field->usage + offset, value);