Messages in this thread | | | Subject | Re: [Linux-kernel-mentees] [PATCH v3] net/bluetooth: Fix slab-out-of-bounds read in hci_extended_inquiry_result_evt() | From | Marcel Holtmann <> | Date | Fri, 10 Jul 2020 19:08:51 +0200 |
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Hi Peilin,
> Check upon `num_rsp` is insufficient. A malformed event packet with a > large `num_rsp` number makes hci_extended_inquiry_result_evt() go out > of bounds. Fix it. > > This patch fixes the following syzbot bug: > > https://syzkaller.appspot.com/bug?id=4bf11aa05c4ca51ce0df86e500fce486552dc8d2 > > Reported-by: syzbot+d8489a79b781849b9c46@syzkaller.appspotmail.com > Cc: stable@vger.kernel.org > Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com> > --- > Change in v3: > - Minimum `skb->len` requirement was 1 byte inaccurate since `info` > starts from `skb->data + 1`. Fix it. > > Changes in v2: > - Use `skb->len` instead of `skb->truesize` as the length limit. > - Leave `num_rsp` as of type `int`. > > net/bluetooth/hci_event.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-)
patch has been applied to bluetooth-next tree.
Regards
Marcel
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