On Sat, 23 May 2026 02:20:29 +0000 [email protected] wrote:
> Hello: > > This patch was applied to netdev/net.git (main) > by Jakub Kicinski <[email protected]>: Did anyone else notice that is isn't a bug? There is no way that a 'count of bytes of kernel memory' can overflow the size of 'long'. -- David > > On Thu, 21 May 2026 14:47:32 +0200 you wrote: > > From: Stefano Garzarella <[email protected]> > > > > On 32-bit architectures, both skb_queue_len() and SKB_TRUESIZE(0) evaluate > > to 32-bit values. The multiplication can overflow before being assigned to > > the u64 skb_overhead variable, making the skb overhead check ineffective. > > > > Cast skb_queue_len() to u64 so the multiplication is always performed in > > 64-bit arithmetic. > > > > [...] > > Here is the summary with links: > - [net] vsock/virtio: fix skb overhead overflow on 32-bit builds > https://git.kernel.org/netdev/net/c/4157501b9a8f > > You are awesome, thank you!
