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geneve: use the correct nlattr array in NL_SET_ERR_MSG_ATTR 

IFLA_GENEVE_* attributes are in the data array, which is correctly
used when fetching the value, but not when setting the extended
ack. Because IFLA_GENEVE_MAX < IFLA_MAX, we avoid out of bounds
array accesses, but we don't provide a pointer to the invalid
attribute to userspace.

Fixes: a025fb5f49 ("geneve: Allow configuration of DF behaviour")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca 2020-04-22 17:29:51 +02:00 committed by David S. Miller
parent cc8e7c69db
commit 9a7b5b50de
1 changed files with 1 additions and 1 deletions
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2
drivers/net/geneve.c
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@ -1207,7 +1207,7 @@ static int geneve_validate(struct nlattr *tb[], struct nlattr *data[],
enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]); enum ifla_geneve_df df = nla_get_u8(data[IFLA_GENEVE_DF]);
if (df < 0 || df > GENEVE_DF_MAX) { if (df < 0 || df > GENEVE_DF_MAX) {
NL_SET_ERR_MSG_ATTR(extack, tb[IFLA_GENEVE_DF], NL_SET_ERR_MSG_ATTR(extack, data[IFLA_GENEVE_DF],
"Invalid DF attribute"); "Invalid DF attribute");
return -EINVAL; return -EINVAL;
} }