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authorHangbin Liu <liuhangbin@gmail.com>2019-02-07 13:36:10 +0300
committerDavid S. Miller <davem@davemloft.net>2019-02-07 21:48:42 +0300
commitc0a47e44c0980b3b23ee31fa7936d70ea5dce491 (patch)
tree5a42363b18ee47dd7e107fd57e151f13bb9e4675 /net/ipv6/sit.c
parente8c32c32b48c2e889704d8ca0872f92eb027838e (diff)
downloadlinux-c0a47e44c0980b3b23ee31fa7936d70ea5dce491.tar.xz
geneve: should not call rt6_lookup() when ipv6 was disabled
When we add a new GENEVE device with IPv6 remote, checking only for IS_ENABLED(CONFIG_IPV6) is not enough as we may disable IPv6 in the kernel command line (ipv6.disable=1), and calling rt6_lookup() would cause a NULL pointer dereference. v2: - don't mix declarations and code (reported by Stefano Brivio, Eric Dumazet) - there's no need to use in6_dev_get() as we only need to check that idev exists (reported by David Ahern). This is under RTNL, so we can simply use __in6_dev_get() instead (Stefano, Eric). Reported-by: Jianlin Shi <jishi@redhat.com> Fixes: c40e89fd358e9 ("geneve: configure MTU based on a lower device") Cc: Alexey Kodanev <alexey.kodanev@oracle.com> Signed-off-by: Hangbin Liu <liuhangbin@gmail.com> Reviewed-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/sit.c')
0 files changed, 0 insertions, 0 deletions