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From: Brian Feldman <green@FreeBSD.org>
Date: Sun, 2 Jul 2000 01:08:10 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/kern kern_ktrace.c sys_generic.c
         uipc_syscalls.c src/sys/svr4 svr4_stream.c src/sys/sys ktrace.h
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green       2000/07/02 01:08:10 PDT

  Modified files:
    sys/kern             kern_ktrace.c sys_generic.c 
                         uipc_syscalls.c 
    sys/svr4             svr4_stream.c 
    sys/sys              ktrace.h 
  Log:
  Modify ktrace's general I/O tracing, ktrgenio(), to use a struct uio *
  instead of a struct iovec * array and int len.  Get rid of stupidly trying
  to allocate all of the memory and copyin()ing the entire iovec[], and
  instead just do the proper VOP_WRITE() in ktrwrite() using a copy of
  the struct uio that the syscall originally used.
  
  This solves the DoS which could easily be performed; to work around the
  DoS, one could also remove "options KTRACE" from the kernel.  This is
  a very strong MFC candidate for 4.1.
  
  Found by:	art@OpenBSD.org
  
  Revision  Changes    Path
  1.37      +29 -35    src/sys/kern/kern_ktrace.c
  1.58      +37 -16    src/sys/kern/sys_generic.c
  1.70      +15 -7     src/sys/kern/uipc_syscalls.c
  1.14      +15 -7     src/sys/svr4/svr4_stream.c
  1.21      +2 -2      src/sys/sys/ktrace.h



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