Re: [PATCH net v3] net: unix: reject negative max_dgram_qlen values

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski <kuba@xxxxxxxxxx>:

On Fri, 16 Oct 2026 11:02:58 +0800 you wrote:
> net.unix.max_dgram_qlen is parsed as a signed int and copied to the u32
> sock::sk_max_ack_backlog when an AF_UNIX socket is created.  Consequently,
> a negative value such as -1 is accepted and converted to UINT_MAX.  Since
> the receive queue length is also u32, its fullness check cannot become true
> for that limit.
> 
> max_dgram_qlen has no documented negative sentinel.  Its existing signed
> interface represents nonnegative values only through INT_MAX; negative bit
> patterns are not a supported encoding for the upper half of the u32
> consumer range.
> 
> [...]

Here is the summary with links:
  - [net,v3] net: unix: reject negative max_dgram_qlen values
    https://git.kernel.org/netdev/net/c/1a4e7bc6e345

You are awesome, thank you!
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