tree 761154a5059757d958de90a823f8fc46f4871b1a
parent 57c076e64ab55adf556cc515914564d61979f7c2
author Miklos Szeredi <mszeredi@redhat.com> 1637845518 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1638949504 +0100

fuse: release pipe buf after last use

commit 473441720c8616dfaf4451f9c7ea14f0eb5e5d65 upstream.

Checking buf->flags should be done before the pipe_buf_release() is called
on the pipe buffer, since releasing the buffer might modify the flags.

This is exactly what page_cache_pipe_buf_release() does, and which results
in the same VM_BUG_ON_PAGE(PageLRU(page)) that the original patch was
trying to fix.

Reported-by: Justin Forbes <jmforbes@linuxtx.org>
Fixes: 712a951025c0 ("fuse: fix page stealing")
Cc: <stable@vger.kernel.org> # v2.6.35
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>