cvs commit: src/sys/kern kern_malloc.c

[Pawel Jakub Dawidek]

pjd         2006-01-17 10:19:38 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/kern             kern_malloc.c 
  Log:
  MFC:    sys/kern/kern_malloc.c  1.150
  
  In realloc(9), determine size of the original block based on
  UMA_SLAB_MALLOC flag.
  In some circumstances (I observed it when I was doing a lot of reallocs)
  UMA_SLAB_MALLOC can be set even if us_keg != NULL.
  
  If this is the case we have wonderful, silent data corruption, because less
  data is copied to the newly allocated region than should be.
  
  Revision   Changes    Path
  1.142.2.7  +1 -1      src/sys/kern/kern_malloc.c