syzbot


INFO: task hung in paste_selection
Status: fixed on 2020/04/15 17:19
Reported-by: syzbot+a172213a651850d94cf2@syzkaller.appspotmail.com
Fix commit: e8c75a30a23c vt: selection, push sel_lock up
First crash: 725d, last: 659d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: KASAN: use-after-free Read in n_tty_receive_buf_common (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit e8c75a30a23c6ba63f4ef6895cbf41fd42f21aa2
Author: Jiri Slaby <jslaby@suse.cz>
Date: Fri Feb 28 11:54:06 2020 +0000

  vt: selection, push sel_lock up

similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in paste_selection C done 10 643d 719d 1/1 fixed on 2020/03/26 13:10
upstream INFO: task hung in paste_selection (2) syz inconclusive 4 23d 102d 0/22 upstream: reported syz repro on 2021/08/19 03:38
linux-4.14 INFO: task hung in paste_selection (3) 1 309d 309d 0/1 auto-closed as invalid on 2021/05/24 08:55
linux-4.14 INFO: task hung in paste_selection (2) 1 502d 502d 0/1 auto-closed as invalid on 2020/11/12 23:24
linux-4.14 INFO: task hung in paste_selection C done 8 643d 718d 1/1 fixed on 2020/03/27 08:38

Sample crash report:

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/12/13 09:34 upstream ae4b064e2a61 08003f64 .config log report syz C
ci-upstream-kasan-gce-root 2019/12/12 09:31 upstream 687dec9b9459 d973f528 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/12/25 21:40 linux-next 7ddd09fc4b74 be5c2c81 .config log report syz
ci-upstream-kasan-gce-smack-root 2020/02/09 04:58 upstream d4f309ca4118 06150bf1 .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/31 14:09 upstream ccaaaf6fe5a5 5ed23f9a .config log report
ci-upstream-kasan-gce-smack-root 2020/01/19 01:18 upstream 244dc2689085 bc8bc756 .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/13 09:06 upstream 040a3c33623b 53faa9fe .config log report
ci-upstream-kasan-gce-root 2019/12/05 13:19 upstream aedc0650f913 b2088328 .config log report