xen: XSA-441 security patch for v6.6

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Merge tag 'xsa441-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "A fix for the xen events driver:

  Closing of an event channel in the Linux kernel can result in a
  deadlock. This happens when the close is being performed in parallel
  to an unrelated Xen console action and the handling of a Xen console
  interrupt in an unprivileged guest.

  The closing of an event channel is e.g. triggered by removal of a
  paravirtual device on the other side. As this action will cause
  console messages to be issued on the other side quite often, the
  chance of triggering the deadlock is not negligible"

* tag 'xsa441-6.6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/events: replace evtchn_rwlock with RCU

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This commit is contained in:

Linus Torvalds 2023-10-10 11:31:42 -07:00

parent 01bbafc63b 87797fad6c

commit 1c8b86a379

1 changed files with 46 additions and 41 deletions

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drivers/xen/events/events_base.c

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