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| /openbmc/linux/net/bluetooth/ |
| H A D | hci_sock.c | diff 11eb85ec42dc8c7a7ec519b90ccf2eeae9409de8 Wed Jan 15 11:49:04 CST 2020 Dan Carpenter <dan.carpenter@oracle.com> Bluetooth: Fix race condition in hci_release_sock()
Syzbot managed to trigger a use after free "KASAN: use-after-free Write
in hci_sock_bind". I have reviewed the code manually and one possibly
cause I have found is that we are not holding lock_sock(sk) when we do
the hci_dev_put(hdev) in hci_sock_release(). My theory is that the bind
and the release are racing against each other which results in this use
after free.
Reported-by: syzbot+eba992608adf3d796bcc@syzkaller.appspotmail.com
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
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