linux-stable/drivers/usb/cdns3
Peter Chen 4dab0fd403 usb: cdns3: gadget: suspicious implicit sign extension
[ Upstream commit 5fca3f0628 ]

The code:
trb->length = cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size)
	       	| TRB_LEN(length));

TRB_BURST_LEN(priv_ep->trb_burst_size) may be overflow for int 32 if
priv_ep->trb_burst_size is equal or larger than 0x80;

Below is the Coverity warning:
sign_extension: Suspicious implicit sign extension: priv_ep->trb_burst_size
with type u8 (8 bits, unsigned) is promoted in priv_ep->trb_burst_size << 24
to type int (32 bits, signed), then sign-extended to type unsigned long
(64 bits, unsigned). If priv_ep->trb_burst_size << 24 is greater than 0x7FFFFFFF,
the upper bits of the result will all be 1.

To fix it, it needs to add an explicit cast to unsigned int type for ((p) << 24).

Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-11-10 12:37:31 +01:00
..
cdns3-pci-wrap.c
core.c
core.h
debug.h
drd.c
drd.h
ep0.c usb: cdns3: ep0: fix some endian issues 2020-07-29 10:18:38 +02:00
gadget-export.h
gadget.c usb: cdns3: gadget: free interrupt after gadget has deleted 2020-10-29 09:58:10 +01:00
gadget.h usb: cdns3: gadget: suspicious implicit sign extension 2020-11-10 12:37:31 +01:00
host-export.h
host.c
Kconfig
Makefile
trace.c
trace.h usb: cdns3: trace: fix some endian issues 2020-07-29 10:18:38 +02:00