cvs commit: src/sys/i386/isa clock.c

[Bruce Evans]

bde         2006-10-06 13:24:17 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_4)
    sys/i386/isa         clock.c 
  Log:
  Fixed overflow at 2G for writing clock frequencies using sysctls.
  Reads worked correctly using the IU format.  Writes only supported
  signed integers using the CTLTYPE_INT flag.  sysctl(1) parses args for
  CTLTYPE_INT using (int)strtol() and has no range checking of course,
  so read-write of frequencies larger than INT_MAX always blindly corrupts
  the frequency to INT_MAX (2G-1).
  
  This keeps writing of TSC frequencies working up to 4GHz.
  
  Revision   Changes    Path
  1.149.2.8  +2 -2      src/sys/i386/isa/clock.c