git: kernel - Fix overflow in alist and blist code

[Matthew Dillon]

commit 7bffb93ef91a2d772902c66b2cd4063e3c4de3bb
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Fri Feb 6 14:33:17 2026 -0800

    kernel - Fix overflow in alist and blist code
    
    * This code tracks swap space and large blocks of contiguous DMA memory.
    
    * Fix overflows in array size calculations that did not take into
      account terminator entries.
    
      (a) Remove terminals from alists entirely.
      (b) Account for space used by the terminator in blists.
    
    Found-by: tuxillo / AI

Summary of changes:
 sys/kern/subr_alist.c | 81 ++++++++++++++++++++++++++++++++++++++-------------
 sys/kern/subr_blist.c |  9 ++++--
 2 files changed, 68 insertions(+), 22 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/7bffb93ef91a2d772902c66b2cd4063e3c4de3bb


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