3.5.7.6 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Tilman Schmidt <til...@imap.cc>
commit d721a1752ba544df8d7d36959038b26bc92bdf80 upstream.
If subtracting 12 from l leaves zero we'd do a zero size allocation,
leading to an oops later when we try to set the NUL terminator.
Reported-by: Dan Carpenter <dan.carpen...@oracle.com>
Signed-off-by: Tilman Schmidt <til...@imap.cc>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesin...@canonical.com>
---
drivers/isdn/gigaset/capi.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c
index 27e4a3e..f45b5b0 100644
--- a/drivers/isdn/gigaset/capi.c
+++ b/drivers/isdn/gigaset/capi.c
@@ -248,6 +248,8 @@ static inline void dump_rawmsg(enum debuglevel level, const
char *tag,
CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
CAPIMSG_CONTROL(data));
l -= 12;
+ if (l <= 0)
+ return;
dbgline = kmalloc(3 * l, GFP_ATOMIC);
if (!dbgline)
return;
--
1.7.9.5
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