mmap breakage?

Alexander Kabaev ak03 at
Sun Apr 4 21:11:54 PDT 2004

On Sun, Apr 04, 2004 at 03:12:51PM -0500, Alan Cox wrote:
> Alfred,
> Please try the attached patch.  This problems appears to be a
> consequence of vm/vm_mmap.c revision 1.180, where as part of a much
> needed code reorganization for locking the check for the /dev/zero
> special case got placed after the permissions check for the general
> case.  This patch simply delays the permissions check for devices
> until you have the necessary lock to also check for /dev/zero.
> Since kan@ authored the reorganization, I'm cc:'ing him on this
> message for purposes of obtaining a review.  (At least one comment
> should be updated to reflect my code changes.)
> Regards,
> Alan
Alan, Alfred,

I had the following patch which is currently pending a review by
Peter Wemm. I meant to commit it on Friday, but ran out of time:

Alexander Kabaev

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