diff options
| author | Tilman Schmidt <tilman@imap.cc> | 2013-01-21 11:57:21 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-02-20 03:15:33 +0000 |
| commit | 3b6e19d45b7333aa113af1209596e65312810665 (patch) | |
| tree | bd1dac4b5601beccf4973a7afc0a8b427075e424 | |
| parent | c475b33242df2b2d8f6ff82c4c83f72e11a4e96d (diff) | |
isdn/gigaset: fix zero size border case in debug dump
[ Upstream commit d721a1752ba544df8d7d36959038b26bc92bdf80 ]
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.carpenter@oracle.com>
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/isdn/gigaset/capi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/capi.c b/drivers/isdn/gigaset/capi.c index fd17bb3175da..08c2329ffac8 100644 --- a/drivers/isdn/gigaset/capi.c +++ b/drivers/isdn/gigaset/capi.c @@ -264,6 +264,8 @@ 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; |