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| author | Xin Long <lucien.xin@gmail.com> | 2023-01-28 10:58:35 -0500 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-02-01 20:54:27 -0800 |
| commit | 7eb072be41ba4d8ecea17092dece50c7375d8980 (patch) | |
| tree | 50f8e38a980db70ccba3f9c33a2a6f083f347cee /net/ipv4/cipso_ipv4.c | |
| parent | a13fbf5ed5b4fc9095f12e955ca3a59b5507ff01 (diff) | |
| download | linux-7eb072be41ba4d8ecea17092dece50c7375d8980.tar.gz linux-7eb072be41ba4d8ecea17092dece50c7375d8980.tar.bz2 linux-7eb072be41ba4d8ecea17092dece50c7375d8980.zip | |
cipso_ipv4: use iph_set_totlen in skbuff_setattr
It may process IPv4 TCP GSO packets in cipso_v4_skbuff_setattr(), so
the iph->tot_len update should use iph_set_totlen().
Note that for these non GSO packets, the new iph tot_len with extra
iph option len added may become greater than 65535, the old process
will cast it and set iph->tot_len to it, which is a bug. In theory,
iph options shouldn't be added for these big packets in here, a fix
may be needed here in the future. For now this patch is only to set
iph->tot_len to 0 when it happens.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/cipso_ipv4.c')
| -rw-r--r-- | net/ipv4/cipso_ipv4.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c index 6cd3b6c559f0..79ae7204e8ed 100644 --- a/net/ipv4/cipso_ipv4.c +++ b/net/ipv4/cipso_ipv4.c @@ -2222,7 +2222,7 @@ int cipso_v4_skbuff_setattr(struct sk_buff *skb, memset((char *)(iph + 1) + buf_len, 0, opt_len - buf_len); if (len_delta != 0) { iph->ihl = 5 + (opt_len >> 2); - iph->tot_len = htons(skb->len); + iph_set_totlen(iph, skb->len); } ip_send_check(iph); |