tree 9a5e79044fd08e7129a8bd599e69c44f12b5a9b0
parent 91e21df688f8a75255ca9c459da39ac96300113a
author Hristo Venev <hristo@venev.name> 1657961494 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1659107146 +0200

be2net: Fix buffer overflow in be_get_module_eeprom

[ Upstream commit d7241f679a59cfe27f92cb5c6272cb429fb1f7ec ]

be_cmd_read_port_transceiver_data assumes that it is given a buffer that
is at least PAGE_DATA_LEN long, or twice that if the module supports SFF
8472. However, this is not always the case.

Fix this by passing the desired offset and length to
be_cmd_read_port_transceiver_data so that we only copy the bytes once.

Fixes: e36edd9d26cf ("be2net: add ethtool "-m" option support")
Signed-off-by: Hristo Venev <hristo@venev.name>
Link: https://lore.kernel.org/r/20220716085134.6095-1-hristo@venev.name
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>