* [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
@ 2022-08-15 6:25 bugzilla-daemon
2022-08-17 11:05 ` [Bug 216364] " bugzilla-daemon
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-15 6:25 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
Bug ID: 216364
Summary: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm
when syzkaller tests
Product: Virtualization
Version: unspecified
Kernel Version: v5.19 mainline kernel
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
Assignee: virtualization_kvm@kernel-bugs.osdl.org
Reporter: pengfei.xu@intel.com
Regression: No
Created attachment 301563
--> https://bugzilla.kernel.org/attachment.cgi?id=301563&action=edit
Host_kernel_missing_endbr_from_kvm
I used syzkaller and found the "Missing ENDBR: andw_ax_dx+0x0/0x10 [kvm]" BUG
in the host.
Platform: ADL-P/TGL-U or TGL-H
Host Kernel: v5.19 mainline kernel with kernel IBT
Guest kernel: v5.19 mainline kernel without kernel IBT, moved kconfig
"CONFIG_X86_KERNEL_IBT=y".
Host kernel enabled kernel IBT by adding the KCONFIG "CONFIG_X86_KERNEL_IBT=y".
In syzkaller guest kernel, guest didn't enable kernel IBT and used 5.19
mainline kernel also.
After launched the syzkaller test about 2 hours.
There was "Missing ENDBR: andw_ax_dx+0x0/0x10 [kvm]" info generated in host
kernel.
[ 0.000000] Linux version 5.19.0-m2 (root@xpf.sh.intel.com) (gcc (GCC) 8.5.0
20210514 (Red Hat 8.5.0-10), GNU ld version 2.36.1-2.el8) #1 SMP
PREEMPT_DYNAMIC Mon Aug 1 14:23:55 CST 2022
[ 5048.057266] traps: Missing ENDBR: andw_ax_dx+0x0/0x10 [kvm]
[ 5048.057440] ------------[ cut here ]------------
[ 5048.057457] kernel BUG at arch/x86/kernel/traps.c:253!
Host dmesg was in attached.
Thanks!
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* [Bug 216364] [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
2022-08-15 6:25 [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests bugzilla-daemon
@ 2022-08-17 11:05 ` bugzilla-daemon
2022-08-17 11:05 ` bugzilla-daemon
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-17 11:05 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
--- Comment #1 from xupengfe (pengfei.xu@intel.com) ---
Created attachment 301591
--> https://bugzilla.kernel.org/attachment.cgi?id=301591&action=edit
Fixed_patch_from_Peter_Z
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* [Bug 216364] [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
2022-08-15 6:25 [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests bugzilla-daemon
2022-08-17 11:05 ` [Bug 216364] " bugzilla-daemon
@ 2022-08-17 11:05 ` bugzilla-daemon
2022-08-19 5:57 ` bugzilla-daemon
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-17 11:05 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
--- Comment #2 from xupengfe (pengfei.xu@intel.com) ---
Peter Zijlstra <peterz@infradead.org> gave the fixed patch.
I will have a try to verify the fixed patch.
Thanks!
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* [Bug 216364] [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
2022-08-15 6:25 [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests bugzilla-daemon
2022-08-17 11:05 ` [Bug 216364] " bugzilla-daemon
2022-08-17 11:05 ` bugzilla-daemon
@ 2022-08-19 5:57 ` bugzilla-daemon
2022-08-19 6:09 ` bugzilla-daemon
2022-08-19 6:13 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-19 5:57 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
--- Comment #3 from xupengfe (pengfei.xu@intel.com) ---
This issue was fixed by the patches in below link:
https://lore.kernel.org/lkml/64365019-57dc-b449-8178-30428e09adf8@redhat.com/
Verified it's could not be reproduced with syzkaller test for more than 4 hours
on TGL-H and ADL-P.
Could close this issue.
Thanks!
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* [Bug 216364] [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
2022-08-15 6:25 [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests bugzilla-daemon
` (2 preceding siblings ...)
2022-08-19 5:57 ` bugzilla-daemon
@ 2022-08-19 6:09 ` bugzilla-daemon
2022-08-19 6:13 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-19 6:09 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
--- Comment #4 from xupengfe (pengfei.xu@intel.com) ---
This issue was fixed by the patches in below link:
https://lore.kernel.org/lkml/64365019-57dc-b449-8178-30428e09adf8@redhat.com/
Verified it could not be reproduced with syzkaller test for more than 4 hours
on TGL-H and ADL-P.
Could close this issue.
Thanks!
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* [Bug 216364] [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests
2022-08-15 6:25 [Bug 216364] New: [Kernel IBT][kvm] There was "Missing ENDBR" in kvm when syzkaller tests bugzilla-daemon
` (3 preceding siblings ...)
2022-08-19 6:09 ` bugzilla-daemon
@ 2022-08-19 6:13 ` bugzilla-daemon
4 siblings, 0 replies; 6+ messages in thread
From: bugzilla-daemon @ 2022-08-19 6:13 UTC (permalink / raw)
To: kvm
https://bugzilla.kernel.org/show_bug.cgi?id=216364
xupengfe (pengfei.xu@intel.com) changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |CODE_FIX
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