Bluetooth: stop proccessing malicious adv data

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Syzbot reported slab-out-of-bounds read in hci_le_adv_report_evt(). The
problem was in missing validaion check.

We should check if data is not malicious and we can read next data block.
If we won't check ptr validness, code can read a way beyond skb->end and
it can cause problems, of course.

Fixes: e95beb4141 ("Bluetooth: hci_le_adv_report_evt code refactoring")
Reported-and-tested-by: syzbot+e3fcb9c4f3c2a931dc40@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

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Pavel Skripkin 2021-11-01 10:12:12 +03:00 • committed by Marcel Holtmann

parent dd2ac1d6d4

commit 3a56ef719f

1 changed files with 7 additions and 1 deletions

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net/bluetooth/hci_event.c

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