From: Stephen Suryaputra ssuryaextr@gmail.com
stable inclusion from stable-5.10.80 commit 9ceac307b58ed35ba85fad928ca48119acd50a41 bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 61e18ce7348bfefb5688a8bcd4b4d6b37c0f9b2a ]
When addr_gen_mode is set to IN6_ADDR_GEN_MODE_NONE, the link-local addr should not be generated. But it isn't the case for GRE (as well as GRE6) and SIT tunnels. Make it so that tunnels consider the addr_gen_mode, especially for IN6_ADDR_GEN_MODE_NONE.
Do this in add_v4_addrs() to cover both GRE and SIT only if the addr scope is link.
Signed-off-by: Stephen Suryaputra ssuryaextr@gmail.com Acked-by: Antonio Quartulli a@unstable.cc Link: https://lore.kernel.org/r/20211020200618.467342-1-ssuryaextr@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- net/ipv6/addrconf.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index 884d430e23cb..29526937077b 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -3097,6 +3097,9 @@ static void sit_add_v4_addrs(struct inet6_dev *idev) memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
if (idev->dev->flags&IFF_POINTOPOINT) { + if (idev->cnf.addr_gen_mode == IN6_ADDR_GEN_MODE_NONE) + return; + addr.s6_addr32[0] = htonl(0xfe800000); scope = IFA_LINK; plen = 64;