diff options
| author | Tilman Schmidt <tilman@imap.cc> | 2013-01-21 11:57:21 +0000 |
|---|---|---|
| committer | Xavier Boudet <x-boudet@ti.com> | 2013-02-18 10:43:45 +0100 |
| commit | 93b24118b54c5042764d42923854c89d3cb0ead8 (patch) | |
| tree | 3a4d99f97fbce73fbbc957a71d98911e74e35aef /drivers/isdn/gigaset | |
| parent | e324b059521d137f9d0ae8876bf4a7390ce0b3d0 (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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/isdn/gigaset')
| -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 579aa021a659..be22d5ee8e0d 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; |