Anirudh Rayabharam b1e3596416 HID: usbhid: fix info leak in hid_submit_ctrl ... [ Upstream commit 6be388f4a35d2ce5ef7dbf635a8964a5da7f799f ] In hid_submit_ctrl(), the way of calculating the report length doesn't take into account that report->size can be zero. When running the syzkaller reproducer, a report of size 0 causes hid_submit_ctrl) to calculate transfer_buffer_length as 16384. When this urb is passed to the usb core layer, KMSAN reports an info leak of 16384 bytes. To fix this, first modify hid_report_len() to account for the zero report size case by using DIV_ROUND_UP for the division. Then, call it from hid_submit_ctrl(). Reported-by: syzbot+7c2bb71996f95a82524c@syzkaller.appspotmail.com Signed-off-by: Anirudh Rayabharam <mail@anirudhrb.com> Acked-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-06-18 10:00:03 +02:00
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hid-core.c	HID: usbhid: fix info leak in hid_submit_ctrl	2021-06-18 10:00:03 +02:00
hid-pidff.c	HID: pidff: fix error return code in hid_pidff_init()	2021-06-10 13:39:15 +02:00
hiddev.c
Kconfig
Makefile
usbhid.h
usbkbd.c
usbmouse.c