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authorYOSHIFUJI Hideaki / 吉藤英明 <yoshfuji@linux-ipv6.org>2012-12-13 04:29:36 +0000
committerDavid S. Miller <davem@davemloft.net>2012-12-13 12:58:11 -0500
commit7bdc1b4abab3af0a803300f706c9814ef4e20a3e (patch)
tree6609b090de8aca06d7fb19c374ee3c90917ccd1c
parent499744209b2cbca66c42119226e5470da3bb7040 (diff)
ndisc: Fix padding error in link-layer address option.
If a natural number n exists where 2 + data_len <= 8n < 2 + data_len + pad, post padding is not initialized correctly. (Un)fortunately, the only type that requires pad is Infiniband, whose pad is 2 and data_len is 20, and this logical error has not become obvious, but it is better to fix. Note that ndisc_opt_addr_space() handles the situation described above correctly. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv6/ndisc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 4c02e6ab96e7..f2a007b7bde3 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -151,8 +151,8 @@ static inline int ndisc_opt_addr_space(struct net_device *dev)
static u8 *ndisc_fill_addr_option(u8 *opt, int type, void *data, int data_len,
unsigned short addr_type)
{
- int space = NDISC_OPT_SPACE(data_len);
int pad = ndisc_addr_option_pad(addr_type);
+ int space = NDISC_OPT_SPACE(data_len + pad);
opt[0] = type;
opt[1] = space>>3;