syzbot


KASAN: use-after-free Read in cdev_put
Status: fixed on 2020/02/12 05:05
Reported-by: syzbot+de5ddcfa2e7edda50ff1@syzkaller.appspotmail.com
Fix commit: 0ce254bc68ed xen-blkback: prevent premature module unload
First crash: 902d, last: 858d

Fix bisection: fixed by (bisect log) :
commit 0ce254bc68edf06f93d3c0271851c619ff729d31
Author: Paul Durrant <pdurrant@amazon.com>
Date: Tue Dec 10 14:53:05 2019 +0000

  xen-blkback: prevent premature module unload

similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 KASAN: use-after-free Read in cdev_put C error 4 862d 902d 0/1 upstream: reported C repro on 2019/11/30 06:54
upstream KASAN: use-after-free Read in cdev_put 6 724d 723d 0/22 auto-closed as invalid on 2020/07/24 11:02

Sample crash report:

Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2019/12/02 09:52 linux-4.14.y fbc5fe7a54d0 f879db37 .config log report syz C
ci2-linux-4-14 2019/12/02 05:10 linux-4.14.y fbc5fe7a54d0 f879db37 .config log report syz C
ci2-linux-4-14 2019/11/30 05:55 linux-4.14.y 43598c571e7e 3a75be00 .config log report syz C
ci2-linux-4-14 2019/12/13 10:50 linux-4.14.y a844dc4c5442 2a752b7c .config log report
ci2-linux-4-14 2019/12/10 18:09 linux-4.14.y a844dc4c5442 4b83c8fb .config log report
ci2-linux-4-14 2019/12/07 16:51 linux-4.14.y a844dc4c5442 85f26751 .config log report