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bonding: fix off-by-one error

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Fix off-by-one error because IFNAMSIZ == 16 and when this
code gets executed we stick a NULL byte where we should not.

How to reproduce:
 with CONFIG_CC_STACKPROTECTOR=y (otherwise it may pass by silently)
 modprobe bonding; echo 1 > /sys/class/net/bond0/bonding/mode;
 echo "AAAAAAAAAAAAAAAA" > /sys/class/net/bond0/bonding/primary;

Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
nikolay@redhat.com 2012-10-31 04:42:51 +00:00 committed by David S. Miller
parent 477864ddd3
commit eb6e98a1b2
1 changed files with 1 additions and 1 deletions
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2
drivers/net/bonding/bond_sysfs.c
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@ -1060,7 +1060,7 @@ static ssize_t bonding_store_primary(struct device *d,
goto out;
}
sscanf(buf, "%16s", ifname); /* IFNAMSIZ */
sscanf(buf, "%15s", ifname); /* IFNAMSIZ */
/* check to see if we are clearing primary */
if (!strlen(ifname) || buf[0] == '\n') {