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USB: legousbtower: fix a signedness bug in tower_probe()

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[ Upstream commit fd47a417e75e2506eb3672ae569b1c87e3774155 ]

The problem is that sizeof() is unsigned long so negative error codes
are type promoted to high positive values and the condition becomes
false.

Fixes: 1d427be4a39d ("USB: legousbtower: fix slab info leak at probe")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191011141115.GA4521@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dan Carpenter 2019-10-11 17:11:15 +03:00 committed by Greg Kroah-Hartman
parent 4df728651b
commit d7030f05a8
1 changed files with 1 additions and 1 deletions
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2
drivers/usb/misc/legousbtower.c
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@ -881,7 +881,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device
get_version_reply,
sizeof(*get_version_reply),
1000);
if (result < sizeof(*get_version_reply)) {
if (result != sizeof(*get_version_reply)) {
if (result >= 0)
result = -EIO;
dev_err(idev, "get version request failed: %d\n", result);