CVS commit: src/sys/kern

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Fri Apr 21 18:30:04 UTC 2023

Modified Files:
        src/sys/kern: subr_disk.c

Log Message:
disk(9): Fix use-after-free race with concurrent disk_set_info.

This can happen with dk(4), which allows wedges to have their size
increased without destroying and recreating the device instance.

Drivers which allow concurrent disk_set_info and disk_ioctl must
serialize disk_set_info with dk_openlock.


To generate a diff of this commit:
cvs rdiff -u -r1.134 -r1.135 src/sys/kern/subr_disk.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.