The patch titled
rfcomm/core.c: avoid dangling pointer, check session exists
has been added to the -mm tree. Its filename is
rfcomm-corec-avoid-dangling-pointer-check-session-exists.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: rfcomm/core.c: avoid dangling pointer, check session exists
From: David Fries <david@xxxxxxxxx>
rfcomm_process_sessions is calling rfcomm_process_rx, but in this case the
session is closed and freed leaving a dangling pointer that blows up when
rfcomm_process_rx returns and rfcomm_process_dlcs is called with the now
dangling session pointer. Check to see if the entry is still in the list.
Signed-off-by: David Fries <David@xxxxxxxxx>
Cc: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Cc: "Gustavo F. Padovan" <padovan@xxxxxxxxxxxxxx>
Cc: "John W. Linville" <linville@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
net/bluetooth/rfcomm/core.c | 6 ++++++
1 file changed, 6 insertions(+)
diff -puN net/bluetooth/rfcomm/core.c~rfcomm-corec-avoid-dangling-pointer-check-session-exists net/bluetooth/rfcomm/core.c
--- a/net/bluetooth/rfcomm/core.c~rfcomm-corec-avoid-dangling-pointer-check-session-exists
+++ a/net/bluetooth/rfcomm/core.c
@@ -1955,6 +1955,12 @@ static inline void rfcomm_process_sessio
default:
rfcomm_process_rx(s);
+ /* The current session can be closed as part of rx
+ * in which case s is now dangling. Check if it
+ * has been removed.
+ */
+ if(n->prev != p)
+ continue;
break;
}
_
Patches currently in -mm which might be from david@xxxxxxxxx are
rfcomm-corec-avoid-dangling-pointer-check-session-exists.patch
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