syzbot


KASAN: out-of-bounds Read in trace_raw_output_kvm_update_master_clock

Status: auto-closed as invalid on 2020/07/09 18:16
Subsystems: trace
[Documentation on labels]
Reported-by: syzbot+1710ad5d47a00f94b962@syzkaller.appspotmail.com
First crash: 1475d, last: 1475d

Sample crash report:
==================================================================
BUG: KASAN: out-of-bounds in trace_raw_output_kvm_update_master_clock+0x147/0x170 include/trace/../../arch/x86/kvm/trace.h:827
Read of size 1 at addr ffffc90005206fb8 by task syz-executor.5/28000

CPU: 0 PID: 28000 Comm: syz-executor.5 Not tainted 5.6.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x315 mm/kasan/report.c:382
 __kasan_report.cold+0x35/0x4d mm/kasan/report.c:511
 kasan_report+0x33/0x50 mm/kasan/common.c:625
 trace_raw_output_kvm_update_master_clock+0x147/0x170 include/trace/../../arch/x86/kvm/trace.h:827
 </IRQ>


Memory state around the buggy address:
 ffffc90005206e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90005206f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc90005206f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                           ^
 ffffc90005207000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc90005207080: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1
==================================================================

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/04/10 18:16 upstream c0cc271173b2 a8c6a3f8 .config console log report ci-upstream-kasan-gce-selinux-root
* Struck through repros no longer work on HEAD.