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: 476d, last: 462d
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd no output from test machine (2) C 89865 476d 529d 0/3 closed as invalid on 2020/06/30 06:21
openbsd no output from test machine (6) C 2779 336d 358d 3/3 fixed on 2020/11/17 21:57
openbsd no output from test machine (5) C 49467 358d 455d 3/3 fixed on 2020/10/27 00:21
openbsd no output from test machine (4) syz 14713 455d 462d 0/3 closed as invalid on 2020/07/21 11:12
openbsd no output from test machine C 551400 529d 1104d 3/3 fixed on 2020/05/08 10:08
openbsd no output from test machine (7) C 3455 5h03m 336d 0/3 upstream: reported C repro on 2020/11/17 22:12
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