Module Name: src
Committed By: riastradh
Date: Sun Mar 13 17:21:29 UTC 2022
Modified Files:
src/sys/kern: kern_proc.c
Log Message:
kern: Fix ordering of loads for pid_table and pid_tbl_mask.
This introduces a load-acquire where there was none before. This is
a simple correctness change. We could avoid the load-acquire, and
use only load-consume, if we used a pointer indirection for _both_
pid_table and pid_tbl_mask. Takes a little more work, and probably
costs an additional cache line of memory traffic, but might be worth
it to avoid the load-acquire for pid lookup.
Reported-by: syzbot+c49e405d0b977aeed...@syzkaller.appspotmail.com
Reported-by: syzbot+1c88ee7086f93607c...@syzkaller.appspotmail.com
Reported-by: syzbot+da4e9ed1319b75fe2...@syzkaller.appspotmail.com
To generate a diff of this commit:
cvs rdiff -u -r1.264 -r1.265 src/sys/kern/kern_proc.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
