GONG, Ruiqi 3a198c95c9
alx: fix OOB-read compiler warning ...
The following message shows up when compiling with W=1:
In function ‘fortify_memcpy_chk’,
inlined from ‘alx_get_ethtool_stats’ at drivers/net/ethernet/atheros/alx/ethtool.c:297:2:
./include/linux/fortify-string.h:592:4: error: call to ‘__read_overflow2_field’
declared with attribute warning: detected read beyond size of field (2nd parameter);
maybe use struct_group()? [-Werror=attribute-warning]
592 | __read_overflow2_field(q_size_field, size);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In order to get alx stats altogether, alx_get_ethtool_stats() reads
beyond hw->stats.rx_ok. Fix this warning by directly copying hw->stats,
and refactor the unnecessarily complicated BUILD_BUG_ON btw.
Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com >
Reviewed-by: Simon Horman <horms@kernel.org >
Link: https://lore.kernel.org/r/20230821013218.1614265-1-gongruiqi@huaweicloud.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com >
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3a198c95c9