Messages in this thread | | | Date | Mon, 29 Jun 2015 18:46:16 +0100 | From | Al Viro <> | Subject | Re: [PATCH] fs/file.c: __fget() and dup2() atomicity rules |
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On Mon, Jun 29, 2015 at 05:10:30PM +0200, Eric Dumazet wrote: > From: Eric Dumazet <edumazet@google.com> > > __fget() makes sure a file refcount is not zero before > taking a reference. It should also fetch again file pointer > in order to respect dup2() atomicity requirements. > > It should either read a NULL pointer or a file on which > a refcount can be taken.
Hmm... The problem is real, but I wonder if one could trigger a long spin there...
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