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link_gre6: Detect invalid encaplimit values 

Looks like a typo: get_u8() returns 0 on success and -1 on error, so the
error checking here was ineffective.

Fixes: a11b7b71a6 ("link_gre6: really support encaplimit option")
Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter 2017-11-28 16:49:58 +01:00 committed by Stephen Hemminger
parent c6a656f4f9
commit 56708ae7c9
1 changed files with 1 additions and 1 deletions
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2
ip/link_gre6.c
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@ -372,7 +372,7 @@ get_failed:
} else {
__u8 uval;
if (get_u8(&uval, *argv, 0) < -1)
if (get_u8(&uval, *argv, 0))
invarg("invalid ELIM", *argv);
encap_limit = uval;
flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT;