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

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

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!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html