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net: check the existence of peer before trying to pad

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There could be case that peer is NULL. This can happen when during
network device hot-add where net device needs to be added first. So
the patch check the existence of peer before trying to do the pad.

Fixes: 969e50b61a ("net: Pad short frames to minimum size before sending from SLiRP/TAP")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Message-id: 20210423031803.1479-1-jasowang@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Jason Wang 2021-04-23 11:18:03 +08:00 • committed by Peter Maydell
parent b1cffefa1b
commit bc38e31b4e
4 changed files with 8 additions and 3 deletions
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5
include/net/net.h
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@ -241,4 +241,9 @@ uint32_t net_crc32_le(const uint8_t *p, int len);
.offset = vmstate_offset_macaddr(_state, _field), \
}
static inline bool net_peer_needs_padding(NetClientState *nc)
{
return nc->peer && !nc->peer->do_not_pad;
}
#endif