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ipv6/route: Add a missing check on proc_dointvec

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[ Upstream commit f0fb9b288d0a7e9cc324ae362e2dfd2cc2217ded ]

While flushing the cache via  ipv6_sysctl_rtcache_flush(), the call
to proc_dointvec() may fail. The fix adds a check that returns the
error, on failure.

Signed-off-by: Aditya Pakki <pakki001@umn.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 14a20e5b4ad9 ("net/ipv6: Fix the RT cache flush via sysctl using a previous delay")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Aditya Pakki 2018-12-24 10:30:17 -06:00 committed by Greg Kroah-Hartman
parent a1f9c83282
commit f00c343be6
1 changed files with 5 additions and 1 deletions
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6
net/ipv6/route.c
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@ -5166,12 +5166,16 @@ int ipv6_sysctl_rtcache_flush(struct ctl_table *ctl, int write,
{
struct net *net;
int delay;
int ret;
if (!write)
return -EINVAL;
net = (struct net *)ctl->extra1;
delay = net->ipv6.sysctl.flush_delay;
proc_dointvec(ctl, write, buffer, lenp, ppos);
ret = proc_dointvec(ctl, write, buffer, lenp, ppos);
if (ret)
return ret;
fib6_run_gc(delay <= 0 ? 0 : (unsigned long)delay, net, delay > 0);
return 0;
}