syzbot


KASAN: null-ptr-deref Write in l2cap_chan_put
Status: upstream: reported syz repro on 2020/08/08 09:46
Reported-by: syzbot+452e9465a3b2817fa4c2@syzkaller.appspotmail.com
First crash: 256d, last: 2d05h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: wild-memory-access Write in l2cap_chan_put 2 50d 74d 0/22 upstream: reported on 2021/02/06 08:36
Patch testing requests:
Created Duration User Patch Repo Result
2021/03/22 09:43 10m ducheng2@gmail.com patch upstream report log
2021/03/22 08:40 12m ducheng2@gmail.com patch upstream report log
2021/03/22 08:05 12m ducheng2@gmail.com patch upstream report log
2021/03/18 05:01 10m ducheng2@gmail.com patch upstream report log
2021/03/18 02:34 12m ducheng2@gmail.com patch upstream report log
2021/03/15 08:12 10m ducheng2@gmail.com patch upstream report log
2021/03/15 04:53 9m ducheng2@gmail.com upstream report log
2020/09/06 08:00 10m anant.thazhemadam@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log
2020/09/02 05:15 10m anant.thazhemadam@gmail.com https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2021/04/19 19:38 upstream bf05bf16 abf9ba4f .config log report syz
ci-upstream-kasan-gce-root 2021/03/13 12:15 upstream f296bfd5 abf9ba4f .config log report syz
ci-upstream-kasan-gce-root 2021/01/24 11:05 upstream e1ae4b0b abf9ba4f .config log report syz
ci-upstream-kasan-gce-root 2020/12/25 10:47 upstream 71c5f031 abf9ba4f .config log report syz
ci-upstream-kasan-gce-root 2020/11/25 10:30 upstream 127c501a abf9ba4f .config log report syz
ci-upstream-kasan-gce-root 2020/10/26 10:12 upstream 3650b228 abf9ba4f .config log report syz
Crashes (6):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/09/05 20:38 upstream c70672d8 abf9ba4f .config log report syz
ci-upstream-kasan-gce-selinux-root 2020/08/08 09:27 upstream 5631c5e0 ff51e522 .config log report syz
ci-upstream-kasan-gce-smack-root 2020/08/08 09:20 upstream 5631c5e0 ff51e522 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2020/09/08 14:46 linux-next 7a695657 abf9ba4f .config log report syz
ci-upstream-net-kasan-gce 2021/03/20 19:18 net-next d773b795 17810eae .config log report info KASAN: null-ptr-deref Write in l2cap_chan_put
ci-upstream-net-kasan-gce 2020/09/26 09:54 net-next 6fba737a 4a006f63 .config log report info