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authorIdo Schimmel <idosch@nvidia.com>2020-08-26 19:48:51 +0300
committerDavid S. Miller <davem@davemloft.net>2020-08-27 02:00:51 +0300
commitd7d49dc77c8db113393a31aced3f0562f4afd439 (patch)
tree2958bcbc5c645f138d841e624b66122f056b6900 /net/ipv4
parent751e42515efbe00cf8fe8c8bb160a207364dbb2b (diff)
downloadlinux-d7d49dc77c8db113393a31aced3f0562f4afd439.tar.xz
ipv4: nexthop: Reduce allocation size of 'struct nh_group'
The struct looks as follows: struct nh_group { struct nh_group *spare; /* spare group for removals */ u16 num_nh; bool mpath; bool fdb_nh; bool has_v4; struct nh_grp_entry nh_entries[]; }; But its offset within 'struct nexthop' is also taken into account to determine the allocation size. Instead, use struct_size() to allocate only the required number of bytes. Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/nexthop.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index 134e92382275..d13730ff9aeb 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -133,12 +133,9 @@ static struct nexthop *nexthop_alloc(void)
static struct nh_group *nexthop_grp_alloc(u16 num_nh)
{
- size_t sz = offsetof(struct nexthop, nh_grp)
- + sizeof(struct nh_group)
- + sizeof(struct nh_grp_entry) * num_nh;
struct nh_group *nhg;
- nhg = kzalloc(sz, GFP_KERNEL);
+ nhg = kzalloc(struct_size(nhg, nh_entries, num_nh), GFP_KERNEL);
if (nhg)
nhg->num_nh = num_nh;