Merge tag 'io_uring-6.18-20251016' of git://git.kernel.org/pub/scm/linux/kernel/git...

Merge tag 'io_uring-6.18-20251016' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

Pull io_uring fixes from Jens Axboe:

 - Revert of a change that went into an older kernel, and which has been
   reported to cause a regression for some write workloads on LVM while
   a snapshop is being created

 - Fix a regression from this merge window, where some compilers (and/or
   certain .config options) would cause an earlier evaluations of a
   dereference which would then cause a NULL pointer dereference.

   I was only able to reproduce this with OPTIMIZE_FOR_SIZE=y, but David
   Howells hit it with just KASAN enabled. Depending on how things
   inlined, this makes sense

 - Fix for a missing lock around a mem region unregistration

 - Fix for ring resizing with the same placement after resize

* tag 'io_uring-6.18-20251016' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux:
  io_uring/rw: check for NULL io_br_sel when putting a buffer
  io_uring: fix unexpected placement on same size resizing
  io_uring: protect mem region deregistration
  Revert "io_uring/rw: drop -EOPNOTSUPP check in __io_complete_rw_common()"