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author | 2017-03-13 13:47:48 +0100 | |
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committer | 2017-03-14 17:07:30 +0800 | |
commit | b0addd3fa6bcd119be9428996d5d4522479ab240 (patch) | |
tree | 3768e9d858743a26feb196a4ae06a16b9a1f8cdc /drivers/usb/misc | |
parent | Linux 4.11-rc2 (diff) | |
download | linux-b0addd3fa6bcd119be9428996d5d4522479ab240.tar.gz linux-b0addd3fa6bcd119be9428996d5d4522479ab240.tar.bz2 linux-b0addd3fa6bcd119be9428996d5d4522479ab240.zip |
USB: idmouse: fix NULL-deref at probe
Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer should a malicious device lack endpoints.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/misc')
-rw-r--r-- | drivers/usb/misc/idmouse.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c index 8b9fd7534f69..502bfe30a077 100644 --- a/drivers/usb/misc/idmouse.c +++ b/drivers/usb/misc/idmouse.c @@ -347,6 +347,9 @@ static int idmouse_probe(struct usb_interface *interface, if (iface_desc->desc.bInterfaceClass != 0x0A) return -ENODEV; + if (iface_desc->desc.bNumEndpoints < 1) + return -ENODEV; + /* allocate memory for our device state and initialize it */ dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (dev == NULL) |