From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Thu, 19 Oct 2023 16:37:41 +0000 (-0700)
Subject: Merge tag 'v6.6-rc7.vfs.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
X-Git-Tag: v6.6.7~1712
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ea1cc20cd4ce55dd920a87a317c43da03ccea192;p=platform%2Fkernel%2Flinux-starfive.git

Merge tag 'v6.6-rc7.vfs.fixes' of git://git./linux/kernel/git/vfs/vfs

Pull vfs fix from Christian Brauner:
 "An openat() call from io_uring triggering an audit call can apparently
  cause the refcount of struct filename to be incremented from multiple
  threads concurrently during async execution, triggering a refcount
  underflow and hitting a BUG_ON(). That bug has been lurking around
  since at least v5.16 apparently.

  Switch to an atomic counter to fix that. The underflow check is
  downgraded from a BUG_ON() to a WARN_ON_ONCE() but we could easily
  remove that check altogether tbh"

* tag 'v6.6-rc7.vfs.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  audit,io_uring: io_uring openat triggers audit reference count underflow
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ea1cc20cd4ce55dd920a87a317c43da03ccea192