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| author | Phong Tran <tranmanphong@gmail.com> | 2019-07-15 22:08:14 +0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-07-15 11:10:31 -0700 |
| commit | f384e62a82ba5d85408405fdd6aeff89354deaa9 (patch) | |
| tree | d9711a2d759695612b76bdc4c2ae2ace671fd31c | |
| parent | c5ec23bb190267f8b6cb287b761c1f6630c4b694 (diff) | |
| download | linux-f384e62a82ba5d85408405fdd6aeff89354deaa9.tar.gz linux-f384e62a82ba5d85408405fdd6aeff89354deaa9.tar.bz2 linux-f384e62a82ba5d85408405fdd6aeff89354deaa9.zip | |
ISDN: hfcsusb: checking idx of ep configuration
The syzbot test with random endpoint address which made the idx is
overflow in the table of endpoint configuations.
this adds the checking for fixing the error report from
syzbot
KASAN: stack-out-of-bounds Read in hfcsusb_probe [1]
The patch tested by syzbot [2]
Reported-by: syzbot+8750abbc3a46ef47d509@syzkaller.appspotmail.com
[1]:
https://syzkaller.appspot.com/bug?id=30a04378dac680c5d521304a00a86156bb913522
[2]:
https://groups.google.com/d/msg/syzkaller-bugs/_6HBdge8F3E/OJn7wVNpBAAJ
Signed-off-by: Phong Tran <tranmanphong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/hardware/mISDN/hfcsusb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c index 4c99739b937e..0e224232f746 100644 --- a/drivers/isdn/hardware/mISDN/hfcsusb.c +++ b/drivers/isdn/hardware/mISDN/hfcsusb.c @@ -1955,6 +1955,9 @@ hfcsusb_probe(struct usb_interface *intf, const struct usb_device_id *id) /* get endpoint base */ idx = ((ep_addr & 0x7f) - 1) * 2; + if (idx > 15) + return -EIO; + if (ep_addr & 0x80) idx++; attr = ep->desc.bmAttributes; |