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authorroel kluin <roel.kluin@gmail.com>2009-10-14 05:26:30 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-29 23:06:39 -0700
commit43ab85021e8286e1641928ab3cc542dd1e8c7f94 (patch)
tree91a933de6faa4fb6db27bea699faa78357d8a25e /net/ax25
parentac958154e9e1548933fe97e4ecbceb30e01e4a6f (diff)
downloadlinux-43ab85021e8286e1641928ab3cc542dd1e8c7f94.tar.gz
ax25: unsigned cannot be less than 0 in ax25_ctl_ioctl()
struct ax25_ctl_struct member `arg' is unsigned and cannot be less than 0. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ax25')
-rw-r--r--net/ax25/af_ax25.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index f05306f168f..f1e998b2796 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -369,6 +369,9 @@ static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
if (ax25_ctl.digi_count > AX25_MAX_DIGIS)
return -EINVAL;
+ if (ax25_ctl.arg > ULONG_MAX / HZ && ax25_ctl.cmd != AX25_KILL)
+ return -EINVAL;
+
digi.ndigi = ax25_ctl.digi_count;
for (k = 0; k < digi.ndigi; k++)
digi.calls[k] = ax25_ctl.digi_addr[k];
@@ -418,14 +421,10 @@ static int ax25_ctl_ioctl(const unsigned int cmd, void __user *arg)
break;
case AX25_T3:
- if (ax25_ctl.arg < 0)
- goto einval_put;
ax25->t3 = ax25_ctl.arg * HZ;
break;
case AX25_IDLE:
- if (ax25_ctl.arg < 0)
- goto einval_put;
ax25->idle = ax25_ctl.arg * 60 * HZ;
break;