# Re: \[PATCH net\] octeontx2-af: initialize lmac\_bmap in rvu\_mcs\_set\_lmac\_bmap()

- From: Jakub Kicinski \<kuba@kernel.org\>
- Date: 2026-08-17 23:20:57 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/08/17426276
- Thread: https://ratatoskr.run/netdev/2026/08/17400089/t.md

```text
On Wed, 12 Aug 2026 08:07:30 +0200 Karl Mehltretter wrote:
> rvu_mcs_set_lmac_bmap() declares lmac_bmap without initializing it and
> only sets bits for valid lmacs with set_bit(), which ORs into the word
> without clearing it first. Bits for invalid or skipped ports keep
> whatever was on the stack, and the garbage is stored into
> mcs->hw->lmac_bmap.
> 
> Initialize lmac_bmap to 0 so only valid lmacs are marked.
> 
> Found with Clang's -Wconditional-uninitialized.

Applied, thanks!
```