syzbot


no output from test machine (3)

Status: fixed on 2020/07/14 23:08
Reported-by: syzbot+462539bc18fef8fc26cc@syzkaller.appspotmail.com
Fix commit: A pty write containing VDISCARD, VREPRINT, or various retyping cases of VERASE would perform (sometimes irrelevant) compute in the kernel which can be heavy (especially with our insufficient tty subsystem locking). Use tsleep_nsec for 1 tick in such circumstances to yield cpu, and also bring interruptability to ptcwrite() https://syzkaller.appspot.com/bug?extid=462539bc18fef8fc26cc ok kettenis millert, discussions with greg and anton
First crash: 883d, last: 869d
similar bugs (7):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd no output from test machine (2) C 89865 883d 936d 0/3 closed as invalid on 2020/06/30 06:21
openbsd no output from test machine (6) C 2779 743d 765d 3/3 fixed on 2020/11/17 21:57
openbsd no output from test machine (5) C 49467 765d 862d 3/3 fixed on 2020/10/27 00:21
openbsd no output from test machine (8) C 67333 now 120d 0/3 upstream: reported C repro on 2022/08/02 15:56
openbsd no output from test machine (4) syz 14713 862d 869d 0/3 closed as invalid on 2020/07/21 11:12
openbsd no output from test machine C 551400 936d 1511d 3/3 fixed on 2020/05/08 10:08
openbsd no output from test machine (7) C 124310 120d 743d 3/3 fixed on 2022/08/02 15:51
Crashes (25293):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-openbsd-main 2020/07/09 03:57 openbsd 09dd33a6a6aa bc238812 .config log syz C
ci-openbsd-multicore 2020/07/14 22:29 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 22:14 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 21:56 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 21:45 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 21:32 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 21:19 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 20:58 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 20:42 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 20:27 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 20:09 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 19:56 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 19:40 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 19:23 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 19:07 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 18:51 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 18:35 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 18:16 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 18:00 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 17:44 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 17:25 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 17:02 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 16:40 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 16:24 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 16:10 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 15:54 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 15:39 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 15:24 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 15:07 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 14:49 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 14:33 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 14:22 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-main 2020/07/14 14:03 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 13:48 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 13:33 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 13:19 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 13:04 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 12:51 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 12:35 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 12:22 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 12:06 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 11:48 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/07/14 11:35 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-multicore 2020/07/14 11:19 openbsd 07af7ebb9803 6f458026 .config log
ci-openbsd-setuid 2020/06/30 06:22 openbsd 7137d9bb1557 917afeaa .config log
* Struck through repros no longer work on HEAD.