From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sat, 4 Apr 2020 19:24:47 +0000 (-0700)
Subject: Merge tag 'keys-fixes-20200329' of git://git.kernel.org/pub/scm/linux/kernel/git... 
X-Git-Tag: v5.7-rc1~86
X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/4c205c84e249e0a91dcfabe461d77667ec9b2d05

Merge tag 'keys-fixes-20200329' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs

Pull keyrings fixes from David Howells:
 "Here's a couple of patches that fix a circular dependency between
  holding key->sem and mm->mmap_sem when reading data from a key.

  One potential issue is that a filesystem looking to use a key inside,
  say, ->readpages() could deadlock if the key being read is the key
  that's required and the buffer the key is being read into is on a page
  that needs to be fetched.

  The case actually detected is a bit more involved - with a filesystem
  calling request_key() and locking the target keyring for write - which
  could be being read"

* tag 'keys-fixes-20200329' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  KEYS: Avoid false positive ENOMEM error on key read
  KEYS: Don't write out to userspace while holding key semaphore
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4c205c84e249e0a91dcfabe461d77667ec9b2d05