more: avoid overflow when -n is the maximum u16 value#12970
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Signed-off-by: Sai Asish Y <say.apm35@gmail.com>
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Is this compatible with GNU util-linux's more? |
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more -n 65535panics with "attempt to add with overflow". The-n/--linesvalue is parsed as au16, and the banner adjustment adds 1, which overflows when the value isu16::MAX.Use
saturating_addso the maximum value is accepted instead of panicking. Added a unit test covering theu16::MAXcase.Fixes #12784.