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| author | David Gibson <david@gibson.dropbear.id.au> | 2024-09-12 16:59:40 +1000 |
|---|---|---|
| committer | Stefano Brivio <sbrivio@redhat.com> | 2024-09-12 09:13:59 +0200 |
| commit | 5ff5d55291d2223c65f889b8eee446b8ed2c551c (patch) | |
| tree | adf0978817b5e38caa66de823ee54cec3b5c0857 /tcp.h | |
| parent | 1f414ed8f0b3101363c1373e338802186eb29b7c (diff) | |
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tcp: Avoid overlapping memcpy() in DUP_ACK handling
When handling the DUP_ACK flag, we copy all the buffers making up the ack
frame. However, all our frames share the same buffer for the Ethernet
header (tcp4_eth_src or tcp6_eth_src), so copying the TCP_IOV_ETH will
result in a (perfectly) overlapping memcpy(). This seems to have been
harmless so far, but overlapping ranges to memcpy() is undefined behaviour,
so we really should avoid it.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'tcp.h')
0 files changed, 0 insertions, 0 deletions