linux-kernel - [ 31/85] Bluetooth: Fix using NULL inquiry entry

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Message-Id: <20120912233545.002443697@linuxfoundation.org>
Date:	Wed, 12 Sep 2012 16:36:14 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	Greg KH <gregkh@...uxfoundation.org>, Ram Malovany <ramm@...com>,
	Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Subject: [ 31/85] Bluetooth: Fix using NULL inquiry entry

From: Greg KH <gregkh@...uxfoundation.org>

3.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ram Malovany <ramm@...com>

commit c810089c27e48b816181b454fcc493d19fdbc2ba upstream.

If entry wasn't found in the hci_inquiry_cache_lookup_resolve do not
resolve the name.This will fix a kernel crash when trying to use NULL
pointer.

Signed-off-by: Ram Malovany <ramm@...com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@...labora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/bluetooth/hci_event.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -1357,6 +1357,9 @@ static bool hci_resolve_next_name(struct
 		return false;
 
 	e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
+	if (!e)
+		return false;
+
 	if (hci_resolve_name(hdev, e) == 0) {
 		e->name_state = NAME_PENDING;
 		return true;


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