WARNING in __kvm_gpc

Title	Replies (including bot)	Last reply
[syzbot] [kvm?] WARNING in __kvm_gpc_refresh (3)	0 (2)	2025/02/26 17:36
[syzbot] Monthly kvm report (Jan 2025)	0 (1)	2025/01/13 10:54

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in __kvm_gpc_refresh kvm	C			178	321d	386d	25/28	fixed on 2024/05/22 23:08
upstream	WARNING in __kvm_gpc_refresh (2) kvm	C	error		2	301d	315d	27/28	fixed on 2024/08/14 03:44

upstream

WARNING in __kvm_gpc_refresh kvm

178

321d

386d

25/28

fixed on 2024/05/22 23:08

upstream

WARNING in __kvm_gpc_refresh (2) kvm

error

301d

315d

27/28

fixed on 2024/08/14 03:44

Created	Duration	User	Patch	Repo	Result
2025/03/12 17:51	23m	retest repro		linux-next	error

Created

Duration

User

Patch

Repo

Result

2025/03/12 17:51

23m

retest repro

linux-next

error

kvm_intel: 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: 5835 at arch/x86/kvm/../../../virt/kvm/pfncache.c:267 __kvm_gpc_refresh+0x11ff/0x1380 virt/kvm/pfncache.c:267 Modules linked in: CPU: 1 UID: 0 PID: 5835 Comm: syz-executor401 Not tainted 6.14.0-rc3-next-20250218-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:__kvm_gpc_refresh+0x11ff/0x1380 virt/kvm/pfncache.c:267 Code: c6 05 69 55 f0 0e 01 48 c7 c7 89 2e 2b 8e be 24 04 00 00 48 c7 c2 a0 eb 21 8c e8 3c 36 66 00 e9 78 f1 ff ff e8 62 c0 8a 00 90 <0f> 0b 90 41 be ea ff ff ff e9 51 fe ff ff e8 4e c0 8a 00 90 0f 0b RSP: 0018:ffffc9000406f140 EFLAGS: 00010293 RAX: ffffffff81373e7e RBX: ffffffffffffff01 RCX: ffff888035118000 RDX: 0000000000000000 RSI: ffff888000000000 RDI: ffff887fffffffff RBP: ffffc9000406f2d0 R08: ffffffff81372d49 R09: 1ffffffff207b48e R10: dffffc0000000000 R11: fffffbfff207b48f R12: ffff887fffffffff R13: dffffc0000000000 R14: ffff888000000000 R15: ffffc900030f73f8 FS: 0000555565e72380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005654f4befc30 CR3: 000000007ecca000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> kvm_gpc_refresh+0xc6/0x110 virt/kvm/pfncache.c:382 kvm_xen_set_evtchn+0x165/0x230 arch/x86/kvm/xen.c:1933 kvm_xen_hvm_evtchn_send+0x1fa/0x370 arch/x86/kvm/xen.c:2013 kvm_arch_vm_ioctl+0xe4d/0x17c0 arch/x86/kvm/x86.c:7262 kvm_vm_ioctl+0x876/0xd70 virt/kvm/kvm_main.c:5285 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2a11846429 Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff5d46cb48 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000400000000000 RCX: 00007f2a11846429 RDX: 0000400000000180 RSI: 00000000400caed0 RDI: 0000000000000001 RBP: 00007f2a118b9610 R08: 00007fff5d46cd18 R09: 00007fff5d46cd18 R10: 00007fff5d46cd18 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fff5d46cd08 R14: 0000000000000001 R15: 0000000000000001 </TASK>

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2025/02/26 17:35	linux-next	e5d3fd687aac	d34966d1	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	WARNING in __kvm_gpc_refresh
2025/01/24 08:44	upstream	8883957b3c9d	521b0ce3	.config	console log	report			info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream	WARNING in __kvm_gpc_refresh
2024/12/29 08:58	upstream	059dd502b263	d3ccff63	.config	console log	report			info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream	WARNING in __kvm_gpc_refresh
2025/02/26 16:08	linux-next	e5d3fd687aac	d34966d1	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-linux-next-kasan-gce-root	WARNING in __kvm_gpc_refresh

Crashes (4):

Assets (help?)