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ipv4: fix refcount leak in fib_check_nh()

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fib_lookup() forces FIB_LOOKUP_NOREF flag, while fib_table_lookup()
does not.

This patch solves the typical message at reboot time or device
dismantle :

unregister_netdevice: waiting for eth0 to become free. Usage count = 4

Fixes: 3bfd847203c6 ("net: Use passed in table for nexthop lookups")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsa@cumulusnetworks.com>
Acked-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-08-15 10:54:07 -07:00 committed by David S. Miller
parent d52736e24f
commit 1e31367899
1 changed files with 2 additions and 1 deletions
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3
net/ipv4/fib_semantics.c
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@ -708,7 +708,8 @@ static int fib_check_nh(struct fib_config *cfg, struct fib_info *fi,
if (tbl)
err = fib_table_lookup(tbl, &fl4, &res,
FIB_LOOKUP_IGNORE_LINKSTATE);
FIB_LOOKUP_IGNORE_LINKSTATE |
FIB_LOOKUP_NOREF);
else
err = fib_lookup(net, &fl4, &res,
FIB_LOOKUP_IGNORE_LINKSTATE);