From owner-cvs-all  Sat May 26 17:57:30 2001
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From: Dima Dorfman <dd@FreeBSD.org>
Date: Sat, 26 May 2001 17:57:27 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/dev/syscons syscons.c
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dd          2001/05/26 17:57:26 PDT

  Modified files:
    sys/dev/syscons      syscons.c 
  Log:
  In the VIRTUAL_TTY macro, add a check to make sure that the result of
  SC_DEV isn't NULL; if it is, evaluate to NULL and don't dereference
  NULL.  Callers of VIRTUAL_TTY must already check for the result being
  NULL since si_tty can be NULL, so this should be safe.
  
  This fixes a panic when trying to switch to a different vty in an
  environment such as userconfig (-c option to the kernel).
  
  PR:		26508
  
  Revision  Changes    Path
  1.360     +3 -2      src/sys/dev/syscons/syscons.c


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