syzbot


uvm_fault: wsevent_fini
Status: fixed on 2020/03/24 16:19
Reported-by: syzbot+34c3041bfd96c888c8bd@syzkaller.appspotmail.com
Fix commit: be78d62e13f6 Ensure that me_evp is still NULL before assignment during open of wscons devices. This condition is checked early on during open but since the same routine could end up sleeping before assigning me_evp, a race against adding the same wscons device to a wsmux could be lost. This in turn can cause a NULL deference during close.
First crash: 493d, last: 493d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
openbsd uvm_fault: wsevent_fini (2) 1 381d 381d 3/3 fixed on 2020/07/30 07:21
openbsd uvm_fault: wsevent_fini (3) C 2 233d 233d 3/3 fixed on 2020/12/06 19:54

Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-openbsd-multicore 2020/03/18 21:51 openbsd 27a9da7eb1aa 2c31c529 .config log report