general protection fault in x86_fsgsbase_read_task
Status: fixed on 2020/09/16 22:51
Fix commit: 8ab49526b53d x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
First crash: 481d, last: 481d

Cause bisection: introduced by (bisect log) :
commit 208151bfb70fb7fb39959998832f7b5879be4751
Author: Helge Deller <>
Date: Sun Jun 14 08:54:10 2020 +0000

  parisc: Convert to BIT_MASK() and BIT_WORD()

Crash: WARNING in ptrace_stop (log)
Repro: C syz .config

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2020/08/14 00:51 upstream 990f227371a4 54ce1ed6 .config log report syz C
ci-upstream-kasan-gce-386 2020/08/13 23:04 upstream 990f227371a4 54ce1ed6 .config log report