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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:15:07 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-08 04:15:07 +0000 |
| commit | 7fd92ba31ac1c688b59aa93cc03b748f920df8fe (patch) | |
| tree | baa580b97c260c790730e2525483eb1953f3c39d /net/ipv4/icmp.c | |
| parent | Adding upstream version 4.19.269. (diff) | |
| download | linux-7fd92ba31ac1c688b59aa93cc03b748f920df8fe.tar.xz linux-7fd92ba31ac1c688b59aa93cc03b748f920df8fe.zip | |
Adding upstream version 4.19.282.upstream/4.19.282
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'net/ipv4/icmp.c')
| -rw-r--r-- | net/ipv4/icmp.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c index aa179e646..af0ddaa55 100644 --- a/net/ipv4/icmp.c +++ b/net/ipv4/icmp.c @@ -759,6 +759,11 @@ void __icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info, room = 576; room -= sizeof(struct iphdr) + icmp_param.replyopts.opt.opt.optlen; room -= sizeof(struct icmphdr); + /* Guard against tiny mtu. We need to include at least one + * IP network header for this message to make any sense. + */ + if (room <= (int)sizeof(struct iphdr)) + goto ende; icmp_param.data_len = skb_in->len - icmp_param.offset; if (icmp_param.data_len > room) |