diff options
| author |   Mathias Krause <minipli@googlemail.com> | 2014-07-12 22:36:44 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-07-14 14:32:51 -0700 |
| commit | 9ecf07a1d8f70f72ec99a0f102c8aa24609d84f4 (patch) | |
| tree | b1fc7364af39c287a118bd990ae2422db2a43d27 /net/core/neighbour.c | |
| parent | net: sctp: fix information leaks in ulpevent layer (diff) | |
| download | linux-dev-9ecf07a1d8f70f72ec99a0f102c8aa24609d84f4.tar.xz linux-dev-9ecf07a1d8f70f72ec99a0f102c8aa24609d84f4.zip | |
neigh: sysctl - simplify address calculation of gc_* variables
The code in neigh_sysctl_register() relies on a specific layout of
struct neigh_table, namely that the 'gc_*' variables are directly
following the 'parms' member in a specific order. The code, though,
expresses this in the most ugly way.
Get rid of the ugly casts and use the 'tbl' pointer to get a handle to
the table. This way we can refer to the 'gc_*' variables directly.
Similarly seen in the grsecurity patch, written by Brad Spengler.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Brad Spengler <spender@grsecurity.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/neighbour.c')
| -rw-r--r-- | net/core/neighbour.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index 32d872eec7f5..559890b0f0a2 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -3059,11 +3059,12 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p, memset(&t->neigh_vars[NEIGH_VAR_GC_INTERVAL], 0, sizeof(t->neigh_vars[NEIGH_VAR_GC_INTERVAL])); } else { + struct neigh_table *tbl = p->tbl; dev_name_source = "default"; - t->neigh_vars[NEIGH_VAR_GC_INTERVAL].data = (int *)(p + 1); - t->neigh_vars[NEIGH_VAR_GC_THRESH1].data = (int *)(p + 1) + 1; - t->neigh_vars[NEIGH_VAR_GC_THRESH2].data = (int *)(p + 1) + 2; - t->neigh_vars[NEIGH_VAR_GC_THRESH3].data = (int *)(p + 1) + 3; + t->neigh_vars[NEIGH_VAR_GC_INTERVAL].data = &tbl->gc_interval; + t->neigh_vars[NEIGH_VAR_GC_THRESH1].data = &tbl->gc_thresh1; + t->neigh_vars[NEIGH_VAR_GC_THRESH2].data = &tbl->gc_thresh2; + t->neigh_vars[NEIGH_VAR_GC_THRESH3].data = &tbl->gc_thresh3; } if (handler) { |