From: Andrei Pelinescu-Onciul <andrei@iptel.org>
To: linux-sctp@vger.kernel.org
Subject: [PATCH 2/3] sctp: fix integer overflow when setting the autoclose timer
Date: Thu, 12 Nov 2009 15:50:14 +0000 [thread overview]
Message-ID: <20091112155014.GO10897@shell.iptel.org> (raw)
When setting the autoclose timeout in jiffies there is a possible
integer overflow if the value in seconds is very large
(e.g. for 2^22 s with HZ\x1024). The problem appears even on
64-bit due to the integer promotion rules. The fix is just a cast
to unsigned long.
Signed-off-by: Andrei Pelinescu-Onciul <andrei@iptel.org>
---
net/sctp/associola.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 525864b..7f69f4d 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -166,7 +166,7 @@ static struct sctp_association *sctp_association_init(struct sctp_association *a
asoc->timeouts[SCTP_EVENT_TIMEOUT_HEARTBEAT] = 0;
asoc->timeouts[SCTP_EVENT_TIMEOUT_SACK] = asoc->sackdelay;
asoc->timeouts[SCTP_EVENT_TIMEOUT_AUTOCLOSE] - sp->autoclose * HZ;
+ (unsigned long)sp->autoclose * HZ;
/* Initilizes the timers */
for (i = SCTP_EVENT_TIMEOUT_NONE; i < SCTP_NUM_TIMEOUT_TYPES; ++i)
--
1.6.5.2
reply other threads:[~2009-11-12 15:50 UTC|newest]
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