1. 08 Nov, 2013 1 commit
  2. 16 Jul, 2013 1 commit
  3. 20 Jul, 2011 1 commit
  4. 23 Sep, 2009 1 commit
    • Davide Libenzi's avatar
      anonfd: split interface into file creation and install · 562787a5
      Davide Libenzi authored
      Split the anonfd interface into a bare file pointer creation one, and a
      file pointer creation plus install one.
      
      There are cases, like the usage of eventfds inside other kernel
      interfaces, where the file pointer created by anonfd needs to be used
      inside the initialization of other structures.
      
      As it is right now, as soon as anon_inode_getfd() returns, the kenrle can
      race with userspace closing the newly installed file descriptor.
      
      This patch, while keeping the old anon_inode_getfd(), introduces a new
      anon_inode_getfile() (whose services are reused in anon_inode_getfd())
      that allows to split the file creation phase and the fd install one.
      
      Once all the kernel structures are initialized, the code can call the
      proper fd_install().
      
      Gregory manifested the need for something like this inside KVM.
      Signed-off-by: default avatarDavide Libenzi <davidel@xmailserver.org>
      Cc: Alexander Viro <viro@zeniv.linux.org.uk>
      Cc: James Morris <jmorris@namei.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Gregory Haskins <ghaskins@novell.com>
      Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
      Acked-by: default avatarRoland Dreier <rolandd@cisco.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      562787a5
  5. 24 Jul, 2008 1 commit
  6. 01 May, 2008 1 commit
    • Al Viro's avatar
      [PATCH] sanitize anon_inode_getfd() · 2030a42c
      Al Viro authored
      a) none of the callers even looks at inode or file returned by anon_inode_getfd()
      b) any caller that would try to look at those would be racy, since by the time
      it returns we might have raced with close() from another thread and that
      file would be pining for fjords.
      Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
      2030a42c
  7. 11 May, 2007 1 commit