cvs commit: src/sys/dev/pci pci_user.c

[Stefan Esser]

se          2003/10/11 15:20:35 PDT

  FreeBSD src repository

  Modified files:
    sys/dev/pci          pci_user.c 
  Log:
  The code that was meant to test alignment of the register offset
  parameter in the read and write case dereferenced an unitialized
  pointer and can't possibly ever have catched an actual invalid
  argument.
  
  This was apparently true for the read/write and getconf cases. The
  latter does not even receive the paramter that is to be verified.
  
  I'm surprised that this did not cause kernel panics, but it seems
  that the uninitialized local variable happens to contain data that
  may be used as a pointer to memory that satisfies the test condition.
  
  Make the code work as intended by moving the test inside the switch
  case where the pointer has been properly initialized.
  
  Since the read and write case shared just about all code (except
  for the single call to PCIB_READ_CONFIG resp. PCIB_WRITE_CONFIG) I
  have merged both cases.
  
  Noticed by:     trhodes at FreeBSD.org (Tom Rhodes)
  
  Revision  Changes    Path
  1.14      +24 -46    src/sys/dev/pci/pci_user.c