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| author | Eric Dumazet <edumazet@google.com> | 2024-02-22 10:50:20 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-26 11:46:13 +0000 |
| commit | 74808e72e0b2d7cac886151198c0330daadaee70 (patch) | |
| tree | 71e6225ab54b6de6e5ae8add5bc501d3889a3bbc /net/core | |
| parent | 4ce5dc9316de50e0da84beafe55d1344f829cece (diff) | |
| download | linux-stable-74808e72e0b2d7cac886151198c0330daadaee70.tar.gz linux-stable-74808e72e0b2d7cac886151198c0330daadaee70.tar.bz2 linux-stable-74808e72e0b2d7cac886151198c0330daadaee70.zip | |
rtnetlink: make rtnl_fill_link_ifmap() RCU ready
Use READ_ONCE() to read the following device fields:
dev->mem_start
dev->mem_end
dev->base_addr
dev->irq
dev->dma
dev->if_port
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/rtnetlink.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 1b26dfa5668d..2d83ab76a3c9 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1455,17 +1455,18 @@ static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, return 0; } -static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) +static int rtnl_fill_link_ifmap(struct sk_buff *skb, + const struct net_device *dev) { struct rtnl_link_ifmap map; memset(&map, 0, sizeof(map)); - map.mem_start = dev->mem_start; - map.mem_end = dev->mem_end; - map.base_addr = dev->base_addr; - map.irq = dev->irq; - map.dma = dev->dma; - map.port = dev->if_port; + map.mem_start = READ_ONCE(dev->mem_start); + map.mem_end = READ_ONCE(dev->mem_end); + map.base_addr = READ_ONCE(dev->base_addr); + map.irq = READ_ONCE(dev->irq); + map.dma = READ_ONCE(dev->dma); + map.port = READ_ONCE(dev->if_port); if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) return -EMSGSIZE; @@ -1875,9 +1876,6 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, goto nla_put_failure; } - if (rtnl_fill_link_ifmap(skb, dev)) - goto nla_put_failure; - if (dev->addr_len) { if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) @@ -1927,6 +1925,9 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, rcu_read_lock(); if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) goto nla_put_failure_rcu; + if (rtnl_fill_link_ifmap(skb, dev)) + goto nla_put_failure_rcu; + rcu_read_unlock(); if (rtnl_fill_prop_list(skb, dev)) |