CVS commit: src/sys/kern

["Andrew Doran" <ad%netbsd.org@localhost>]

Module Name:    src
Committed By:   ad
Date:           Wed Jan 22 13:19:33 UTC 2020

Modified Files:
        src/sys/kern: kern_lock.c kern_synch.c

Log Message:
- DIAGNOSTIC: check for leaked kernel_lock in mi_switch().

- Now that ci_biglock_wanted is set later, explicitly disable preemption
  while acquiring kernel_lock.  It was blocked in a roundabout way
  previously.

Reported-by: syzbot+43111d810160fb4b978b%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+f5b871bd00089bf97286%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+cd1f15eee5b1b6d20078%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+fb945a331dabd0b6ba9e%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+53a0c2342b361db25240%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+552222a952814dede7d1%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+c7104a72172b0f9093a4%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+efbd30c6ca0f7d8440e8%syzkaller.appspotmail.com@localhost
Reported-by: syzbot+330a421bd46794d8b750%syzkaller.appspotmail.com@localhost


To generate a diff of this commit:
cvs rdiff -u -r1.165 -r1.166 src/sys/kern/kern_lock.c
cvs rdiff -u -r1.336 -r1.337 src/sys/kern/kern_synch.c

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