Public bug reported:

SRU Justification:

[Impact]
   This stable patchset update affects only the FUSE filesystem, since
   we have received bug reports about FUSE causing problems with the
   Bionic kernel, see also bug #1823972.

   The upstream process for stable tree updates is quite similar
   in scope to the Ubuntu SRU process, e.g., each patch has to
   demonstrably fix a bug, and each patch is vetted by upstream
   by originating either directly from a mainline/stable Linux tree or
   a minimally backported form of that patch.

   The following upstream
   stable patches should be included in the Ubuntu kernel:

   upstream stable patchset 2019-04-12 (ported from v4.15 .. v5.0)
   from git://git.kernel.org/

fuse: decrement NR_WRITEBACK_TEMP on the right page
fuse: call pipe_buf_release() under pipe lock
fuse: handle zero sized retrieve correctly
fuse: continue to send FUSE_RELEASEDIR when FUSE_OPEN returns ENOSYS
fuse: fix use-after-free in fuse_direct_IO()
fuse: fix possibly missed wake-up after abort
fuse: fix leaked notify reply 
fuse: fix blocked_waitq wakeup
fuse: set FR_SENT while locked 
fuse: Fix use-after-free in fuse_dev_do_write()
fuse: Fix use-after-free in fuse_dev_do_read()
fuse: Don't access pipe->buffers without pipe_lock()
fuse: Fix oops at process_init_reply()
fuse: umount should wait for all requests 
fuse: fix unlocked access to processing queue
fuse: fix double request_end()

** Affects: linux (Ubuntu)
     Importance: Undecided
     Assignee: Andrea Righi (arighi)
         Status: Invalid

** Affects: linux (Ubuntu Bionic)
     Importance: Medium
         Status: In Progress


** Tags: kernel-stable-tracking-bug

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Andrea Righi (arighi)

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https://bugs.launchpad.net/bugs/1824553

Title:
  Bionic update: update stable patchset for fuse 2019-04-12

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