Re: [PATCH net v2] net: octeontx2-pf: Fix UB in shift operation
| Newsgroups | org.kernel.vger.netdev,org.kernel.vger.linux-kernel,org.kernel.vger.stable |
|---|---|
| Message-ID | <178602240564.840277.12436088481002390035.git-patchwork-notify@kernel.org> |
Hello: This patch was applied to netdev/net.git (main) by Paolo Abeni <[email protected]>: On Tue, 4 Aug 2026 15:04:48 +0300 you wrote: > From: "Sergey V. Frolov" <[email protected]> > > In function otx2_get_egress_burst_cfg, when the parameter `burst` is > 255 and the max mantissa is 255 (0xFFULL), `burst_exp` is set to > `ilog2(255) - 1`, which equals 6. > > This results in an unsigned wrap-around when calculating > `(1ULL << (*burst_exp - 7))`, since `*burst_exp - 7` becomes -1, > which makes the shift operand 0xFFFFFFFF. This value is greater than > the width of the left operand. > > [...] Here is the summary with links: - [net,v2] net: octeontx2-pf: Fix UB in shift operation https://git.kernel.org/netdev/net/c/7e2d693af0d4 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html