Re: [PATCH] nbd: Reclassify sockets to avoid lockdep circular dependency

[Jens Axboe]

On Sat, 13 Jun 2026 04:26:19 +0000, Eric Dumazet wrote:
> syzbot reported a possible circular locking dependency in udp_sendmsg()
> where fs_reclaim can be triggered while holding sk_lock, and fs_reclaim
> can eventually depend on another sk_lock (e.g., if NBD is used for swap
> or writeback and NBD uses TLS/TCP which acquires sk_lock).
> 
> Since the UDP socket and the NBD TCP/TLS socket are different, this is a
> false positive. Fix this by reclassifying NBD sockets to a separate lock
> class when they are added to the NBD device.
> 
> [...]

Applied, thanks!

[1/1] nbd: Reclassify sockets to avoid lockdep circular dependency
      commit: d532cddb6c6049ced414d64d83c6ce7149a6421a

Best regards,
-- 
Jens Axboe