WARNING in handle_ept_misconfig

Status: upstream: reported C repro on 2019/04/22 11:42
Reported-by: syzbot+9d5d8e8c20db4deefb50@syzkaller.appspotmail.com
First crash: 2651d, last: 1507d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in handle_ept_misconfig kvm-x86 -1 C 238 3071d 3194d 4/29 fixed on 2018/03/06 13:29
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2023/03/01 15:32 11m retest repro linux-4.14.y report log
2023/03/01 14:32 14m retest repro linux-4.14.y report log
2023/03/01 13:32 10m retest repro linux-4.14.y report log
2022/11/10 01:30 14m retest repro linux-4.14.y report log
2022/11/10 00:30 10m retest repro linux-4.14.y report log
2022/11/09 23:30 9m retest repro linux-4.14.y report log
▶ ▼ Fix bisection attempts (9)
Created Duration User Patch Repo Result
2021/06/02 06:10 0m bisect fix linux-4.14.y error job log
2021/01/04 14:26 32m bisect fix linux-4.14.y OK (0) job log log
2020/12/05 13:48 38m bisect fix linux-4.14.y OK (0) job log log
2020/10/23 03:00 32m bisect fix linux-4.14.y OK (0) job log log
2020/09/23 02:27 33m bisect fix linux-4.14.y OK (0) job log log
2020/03/27 10:06 32m bisect fix linux-4.14.y OK (0) job log log
2020/02/26 07:50 35m bisect fix linux-4.14.y OK (0) job log log
2020/01/27 07:17 32m bisect fix linux-4.14.y OK (0) job log log
2019/12/28 06:45 32m bisect fix linux-4.14.y OK (0) job log log

Sample crash report:
L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details.
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7988 at arch/x86/kvm/vmx.c:6952 handle_ept_misconfig+0x11f/0x430 arch/x86/kvm/vmx.c:6952
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7988 Comm: syz-executor313 Not tainted 4.14.282-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 panic+0x1f9/0x42d kernel/panic.c:183
 __warn.cold+0x20/0x44 kernel/panic.c:547
 report_bug+0x208/0x250 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 fixup_bug arch/x86/kernel/traps.c:172 [inline]
 do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:handle_ept_misconfig+0x11f/0x430 arch/x86/kvm/vmx.c:6952
RSP: 0018:ffff88808d54fa68 EFLAGS: 00010297
RAX: ffff8880995726c0 RBX: ffffffff8114e8d0 RCX: 7ff0000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b3068040
RBP: ffff8880b3068040 R08: 0000000000000007 R09: ffff88808d54f9a8
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff2
R13: 0000000000000031 R14: 0000000000000000 R15: ffff8880b3068040
 vmx_handle_exit+0x1f8/0x14b0 arch/x86/kvm/vmx.c:9184
 vcpu_enter_guest arch/x86/kvm/x86.c:7313 [inline]
 vcpu_run arch/x86/kvm/x86.c:7376 [inline]
 kvm_arch_vcpu_ioctl_run+0x1dc7/0x5c80 arch/x86/kvm/x86.c:7543
 kvm_vcpu_ioctl+0x3de/0xc50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2698
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f3bebc68d39
RSP: 002b:00007ffe39504838 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3bebc68d39
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f3bebc2c830 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 00007f3bebc2c8c0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (100):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2022/06/09 09:20 linux-4.14.y b8f3be299d51 0d5abf15 .config console log report syz C ci2-linux-4-14 WARNING in handle_ept_misconfig
2019/04/22 10:41 linux-4.14.y 68d7a45eec10 0a77c33c .config console log report syz C ci2-linux-4-14
2021/03/21 11:20 linux-4.14.y cb83ddcd5332 17810eae .config console log report syz ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/06/09 09:03 linux-4.14.y b8f3be299d51 0d5abf15 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/04/22 17:17 linux-4.14.y 15a1c6b6f516 131df97d .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/04/22 04:06 linux-4.14.y 15a1c6b6f516 2738b391 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/04/04 18:31 linux-4.14.y 74766a973637 5915c2cb .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/02/24 18:46 linux-4.14.y fa33f9094f36 b28851a4 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/01/27 22:08 linux-4.14.y bbb957e1bd4a 64a8e201 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/01/19 16:39 linux-4.14.y 4ba8e26127c3 0620189b .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/01/15 19:38 linux-4.14.y 4ba8e26127c3 723cfaf0 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2022/01/03 02:40 linux-4.14.y a6ca7c65b137 e1768e9c .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/05/03 05:22 linux-4.14.y 7d7d1c0ab3eb 77e2b668 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/30 20:14 linux-4.14.y 7d7d1c0ab3eb 77e2b668 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/24 11:13 linux-4.14.y cf256fbcbe34 17f0b706 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/18 20:01 linux-4.14.y cf256fbcbe34 7e2b734b .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/14 04:04 linux-4.14.y 958e517f4e16 a184b83e .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/12 19:09 linux-4.14.y 958e517f4e16 6a81331a .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/04/01 15:44 linux-4.14.y bd634aa64163 6a81331a .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/23 08:24 linux-4.14.y cb83ddcd5332 8092f30d .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/11 17:04 linux-4.14.y c7150cd2fa8c c2ca1f2a .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/11 09:14 linux-4.14.y 1d177c0872ab c2ca1f2a .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/10 18:50 linux-4.14.y 1d177c0872ab 764067f3 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/06 20:58 linux-4.14.y 397a88b2cc86 e4b4d570 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/03 06:04 linux-4.14.y 3242aa3a635c e5b64d68 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/03/01 00:02 linux-4.14.y 3242aa3a635c 4c37c133 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/02/28 12:02 linux-4.14.y 3242aa3a635c 4c37c133 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2021/01/29 14:25 linux-4.14.y 2d2791fce891 6593fd32 .config console log report info ci2-linux-4-14 WARNING in handle_ept_misconfig
2020/11/05 13:48 linux-4.14.y 6b6446efedb2 cba33199 .config console log report info ci2-linux-4-14
2020/10/27 20:08 linux-4.14.y 5b7a52cd2eef 94942294 .config console log report info ci2-linux-4-14
2020/08/24 02:27 linux-4.14.y 6a24ca2506d6 cef5ae68 .config console log report ci2-linux-4-14
2020/08/17 01:40 linux-4.14.y 14b58326976d 5ce13532 .config console log report ci2-linux-4-14
2020/08/16 14:35 linux-4.14.y 14b58326976d 5ce13532 .config console log report ci2-linux-4-14
2020/08/16 12:35 linux-4.14.y 14b58326976d 5ce13532 .config console log report ci2-linux-4-14
2020/08/16 01:03 linux-4.14.y 14b58326976d 5ce13532 .config console log report ci2-linux-4-14
2020/08/14 12:01 linux-4.14.y 14b58326976d 5ce13532 .config console log report ci2-linux-4-14
2020/08/12 12:34 linux-4.14.y 14b58326976d 0d7bd2e0 .config console log report ci2-linux-4-14
2020/08/11 04:58 linux-4.14.y 14b58326976d d3694ffb .config console log report ci2-linux-4-14
2020/08/10 09:14 linux-4.14.y 14b58326976d 70301872 .config console log report ci2-linux-4-14
2020/08/06 10:29 linux-4.14.y ca4f2c56d416 4ca1c0ea .config console log report ci2-linux-4-14
2020/07/09 22:11 linux-4.14.y b850307b279c edf162e8 .config console log report ci2-linux-4-14
2020/07/09 01:00 linux-4.14.y b850307b279c 9f9845eb .config console log report ci2-linux-4-14
2020/06/29 23:23 linux-4.14.y b850307b279c 917afeaa .config console log report ci2-linux-4-14
2020/06/29 15:10 linux-4.14.y b850307b279c ce9ef6f2 .config console log report ci2-linux-4-14
2020/06/20 10:50 linux-4.14.y b850307b279c c655ec77 .config console log report ci2-linux-4-14
2020/06/15 18:45 linux-4.14.y b850307b279c 8e3ab941 .config console log report ci2-linux-4-14
2020/06/04 23:49 linux-4.14.y c6db52a88798 6720fdef .config console log report ci2-linux-4-14
2020/06/03 06:17 linux-4.14.y 4f68020fef1c f3ba1b5b .config console log report ci2-linux-4-14
2020/06/03 03:20 linux-4.14.y 4f68020fef1c f3ba1b5b .config console log report ci2-linux-4-14
2020/06/02 15:23 linux-4.14.y 4f68020fef1c 52fd7b7d .config console log report ci2-linux-4-14
2020/06/01 03:38 linux-4.14.y 4f68020fef1c a0331e89 .config console log report ci2-linux-4-14
2020/05/28 19:17 linux-4.14.y 4f68020fef1c c7192a2f .config console log report ci2-linux-4-14
2020/05/28 11:58 linux-4.14.y 4f68020fef1c 9072c126 .config console log report ci2-linux-4-14
2020/05/28 09:18 linux-4.14.y 4f68020fef1c 9072c126 .config console log report ci2-linux-4-14
2019/07/22 02:33 linux-4.14.y ff33472c282e 1656845f .config console log report ci2-linux-4-14
2019/06/28 11:52 linux-4.14.y f4cc0ed9b2c7 7509bf36 .config console log report ci2-linux-4-14
2019/06/15 13:25 linux-4.14.y a74d0e937a3a 442206d7 .config console log report ci2-linux-4-14
2019/06/11 10:22 linux-4.14.y e6a95d8851f1 5b5826d0 .config console log report ci2-linux-4-14
2019/04/28 13:37 linux-4.14.y fa5941f45d7e b617407b .config console log report ci2-linux-4-14
* Struck through repros no longer work on HEAD.