[Midnightbsd-cvs] [MidnightBSD/src] d9fdd0: vt: Avoid integer overflow in CONS_HISTORY ioctl

[Ed Maste]

  Branch: refs/heads/stable/4.0
  Home:   https://github.com/MidnightBSD/src
  Commit: d9fdd0bb30800aef88f349198fd933ec21eb508d
      https://github.com/MidnightBSD/src/commit/d9fdd0bb30800aef88f349198fd933ec21eb508d
  Author: Ed Maste <emaste at FreeBSD.org>
  Date:   2026-06-10 (Wed, 10 Jun 2026)

  Changed paths:
    M sys/dev/vt/vt_buf.c
    M sys/dev/vt/vt_core.c

  Log Message:
  -----------
  vt: Avoid integer overflow in CONS_HISTORY ioctl

Reviewed by:	markj, vexeduxr
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D57250

(cherry picked from commit 0ae946e7223df5ef3f7980af1d774d7f593f6421)
(cherry picked from commit deaaddf1d3c4283649945553ad7e3208c8424308)
(cherry picked from commit b5a4f4bfbc95d5d5361da708728f7f4a6db2ee60)



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