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From: Matthew D Fleming <mdf@FreeBSD.org>
Date: Wed, 11 Aug 2010 22:10:37 +0000 (UTC)
To: cvs-src-old@freebsd.org
X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/share/man/man9 memguard.9 src/sys/kern
 kern_malloc.c src/sys/vm memguard.c memguard.h vm_extern.h vm_kern.c
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mdf         2010-08-11 22:10:37 UTC

  FreeBSD src repository

  Modified files:
    share/man/man9       memguard.9 
    sys/kern             kern_malloc.c 
    sys/vm               memguard.c memguard.h vm_extern.h 
                         vm_kern.c 
  Log:
  SVN rev 211194 on 2010-08-11 22:10:37Z by mdf
  
  Rework memguard(9) to reserve significantly more KVA to detect
  use-after-free over a longer time.  Also release the backing pages of
  a guarded allocation at free(9) time to reduce the overhead of using
  memguard(9).  Allow setting and varying the malloc type at run-time.
  Add knobs to allow:
  
   - randomly guarding memory
   - adding un-backed KVA guard pages to detect underflow and overflow
   - a lower limit on the size of allocations that are guarded
  
  Reviewed by:    alc
  Reviewed by:    brueffer, Ulrich Spörlein <uqs spoerlein net> (man page)
  Silence from:   -arch
  Approved by:    zml (mentor)
  MFC after:      1 month
  
  Revision  Changes    Path
  1.6       +87 -31    src/share/man/man9/memguard.9
  1.175     +21 -18    src/sys/kern/kern_malloc.c
  1.9       +288 -256  src/sys/vm/memguard.c
  1.5       +16 -5     src/sys/vm/memguard.h
  1.95      +1 -0      src/sys/vm/vm_extern.h
  1.145     +27 -8     src/sys/vm/vm_kern.c