CommitterJonathan T. Looney (jtl) (1)
AuthorJonathan T. Looney (jtl) (1)
Branchesreleng/11.2 (1)


FreeBSD/src cd48d4c (r332831) — sys/kern subr_terminal.c

by Jonathan T. Looney (jtl) on ⎇
MFC r314116:
  Fix a panic during boot caused by inadequate locking of some vt(4) driver
  data structures.

  vt_change_font() calls vtbuf_grow() to change some vt driver data
  structures. It uses TF_MUTE to prevent the console from trying to use
  those data structures while it changes them.

  During the early stage of the boot process, the vt driver's tc_done
  routine uses those data structures; however, it is currently called
  outside the TF_MUTE check.

  Move the tc_done routine inside the locked TF_MUTE check.

PR:             217282
Sponsored by:   Netflix, Inc.
DeltaFile
+5-3sys/kern/subr_terminal.c
+5-31 files

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