CVS commit: src/sys/dev/pci

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Sat Apr 13 06:17:33 UTC 2019

Modified Files:
        src/sys/dev/pci: vioscsi.c

Log Message:
Fix use-after-free. If we're not polling, virtio_enqueue_commit() will send
the transaction, and it means 'xs' can be immediately freed. So, save the
value of xs_control beforehand.

Detected by KASAN, ok jdolecek@.

Fixes PR/54008
Reported-by: syzbot+6513c4afe66237d7207f%syzkaller.appspotmail.com@localhost


To generate a diff of this commit:
cvs rdiff -u -r1.20 -r1.21 src/sys/dev/pci/vioscsi.c

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