[PATCH 51/81] isdn/gigaset: fix zero size border case in debug dump
3.5.7.6 -stable review patch. If anyone has any objections, please let me know. -- From: Tilman Schmidt 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 Signed-off-by: Tilman Schmidt Signed-off-by: David S. Miller Signed-off-by: Herton Ronaldo Krzesinski --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
[PATCH 51/81] isdn/gigaset: fix zero size border case in debug dump
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 -- To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/