syzbot


WARNING in kvm_arch_vcpu_ioctl_run (6)

Status: upstream: reported C repro on 2025/07/17 14:50
Subsystems: kvm-x86
[Documentation on labels]
Reported-by: syzbot+cc2032ba16cc2018ca25@syzkaller.appspotmail.com
Fix commit: e750f8539128 KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu-native-arm64-kvm ci-upstream-gce-arm64]
First crash: 93d, last: 11d
Discussions (2)
Title Replies (including bot) Last reply
[syzbot] Monthly kvm-x86 report (Aug 2025) 0 (1) 2025/08/13 09:55
[syzbot] [kvm-x86?] WARNING in kvm_arch_vcpu_ioctl_run (6) 1 (2) 2025/07/17 14:53
Similar bugs (11)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in kvm_arch_vcpu_ioctl_run (5) kvm-x86 -1 C error 343 770d 857d 23/29 fixed on 2023/10/12 12:47
upstream WARNING in kvm_arch_vcpu_ioctl_run (4) kvm-x86 -1 C error 288 862d 946d 22/29 fixed on 2023/06/08 14:41
upstream WARNING in kvm_arch_vcpu_ioctl_run (2) kvm-x86 -1 C 61018 2818d 2907d 4/29 fixed on 2018/03/13 09:44
linux-6.6 WARNING in kvm_arch_vcpu_ioctl_run origin:upstream -1 C 2 34d 34d 0/2 upstream: reported C repro on 2025/09/13 04:51
upstream WARNING in kvm_arch_vcpu_ioctl_run -1 C 20284 2943d 3008d 3/29 fixed on 2017/09/26 01:38
linux-4.14 WARNING in kvm_arch_vcpu_ioctl_run -1 C inconclusive 71 1129d 2305d 0/1 upstream: reported C repro on 2019/06/25 23:07
upstream WARNING in kvm_arch_vcpu_ioctl_run (3) kvm-x86 -1 C done error 16157 967d 2760d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in kvm_arch_vcpu_ioctl_run -1 C error 116 1038d 2314d 0/1 upstream: reported C repro on 2019/06/17 10:07
linux-5.15 WARNING in kvm_arch_vcpu_ioctl_run origin:lts-only -1 C inconclusive 1158 13h58m 922d 0/3 upstream: reported C repro on 2023/04/09 03:02
android-6-12 WARNING in kvm_arch_vcpu_ioctl_run origin:upstream -1 C 49 7d13h 92d 0/1 premoderation: reported C repro on 2025/07/17 01:43
linux-6.1 WARNING in kvm_arch_vcpu_ioctl_run origin:lts-only -1 C done 711 14h28m 939d 0/3 upstream: reported C repro on 2023/03/23 13:22

Sample crash report:
WARNING: CPU: 1 PID: 6108 at arch/x86/kvm/x86.c:11645 kvm_arch_vcpu_ioctl_run+0x13bc/0x18c0 arch/x86/kvm/x86.c:11645
Modules linked in:
CPU: 1 UID: 0 PID: 6108 Comm: syz.0.16 Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:kvm_arch_vcpu_ioctl_run+0x13bc/0x18c0 arch/x86/kvm/x86.c:11645
Code: 0a 00 00 00 00 00 00 e8 25 88 be 1e 31 ff 89 c5 89 c6 e8 e7 68 7a 00 85 ed 0f 8f f4 f0 ff ff e9 f5 f1 ff ff e8 95 6d 7a 00 90 <0f> 0b 90 e9 9c f0 ff ff e8 87 6d 7a 00 90 0f 0b 90 e9 d3 f0 ff ff
RSP: 0018:ffffc9000379fc38 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888044358000 RCX: ffffffff81417587
RDX: ffff88802327a440 RSI: ffffffff814184eb RDI: 0000000000000007
RBP: 0000000000000001 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804ff02000
R13: ffff8880443580d8 R14: 0000000000000000 R15: ffff88804ff02120
FS:  000055555f07c500(0000) GS:ffff8880d6813000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000005200000c CR3: 0000000033cb3000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 kvm_vcpu_ioctl+0x5eb/0x1690 virt/kvm/kvm_main.c:4464
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f8b18e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdc1bf8098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4f8b3b5fa0 RCX: 00007f4f8b18e929
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f4f8b210ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f8b3b5fa0 R14: 00007f4f8b3b5fa0 R15: 0000000000000003
 </TASK>

Crashes (117):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/07/16 23:37 upstream 155a3c003e55 44f8051e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/16 23:13 upstream 155a3c003e55 44f8051e .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 04:07 linux-next 931e46dcbc7e dcc075fb .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/07/28 23:29 linux-next d086c886ceb9 c4a95487 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/07/22 12:26 linux-next d086c886ceb9 1555463b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/09/24 03:22 upstream cec1e6e5d1ab 0abd0691 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/08/15 02:23 upstream 0cc53520e68b dcc075fb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
2025/08/11 04:12 upstream 8f5ae30d69d7 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in kvm_arch_vcpu_ioctl_run
2025/10/06 10:17 upstream fd94619c4336 91305dbe .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/10/06 04:23 upstream 6a74422b9710 49379ee0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/10/06 03:18 upstream 6a74422b9710 49379ee0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/10/04 19:41 upstream cbf33b8e0b36 49379ee0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/26 09:23 upstream 4ff71af020ae 0abd0691 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/21 15:16 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/21 11:47 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/21 10:26 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/21 04:23 upstream 3b08f56fbbb9 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/20 15:21 upstream cd89d487374c 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/20 12:23 upstream 1522b530ac3e 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/20 04:14 upstream 1522b530ac3e 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/20 02:25 upstream 1522b530ac3e 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/19 21:27 upstream 097a6c336d00 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/19 21:20 upstream 097a6c336d00 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/19 20:16 upstream 097a6c336d00 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/19 17:43 upstream 097a6c336d00 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/19 02:55 upstream cbf658dd0941 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/18 15:05 upstream 8b789f2b7602 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/18 13:28 upstream 8b789f2b7602 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/18 10:52 upstream 8b789f2b7602 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/17 23:48 upstream d4b779985a6c e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/17 08:57 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/17 04:11 upstream 5aca7966d2a7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/16 21:35 upstream 46a51f4f5eda e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/16 19:41 upstream 46a51f4f5eda e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/15 22:51 upstream f83ec76bf285 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/15 21:33 upstream f83ec76bf285 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/14 21:02 upstream f83a4f2a4d8c e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/14 19:49 upstream f83a4f2a4d8c e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/09/13 03:29 upstream 22f20375f5b7 e2beed91 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/25 03:09 upstream 69fd6b99b8f8 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/25 02:08 upstream 69fd6b99b8f8 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/24 15:09 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/24 13:27 upstream 8d245acc1e88 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/22 22:32 upstream cf6fc5eefc5b bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/22 06:35 upstream 3957a5720157 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/22 03:45 upstream 3957a5720157 bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 16:35 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 13:25 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 12:11 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 10:21 upstream be48bcf004f9 523f460e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 08:43 upstream be48bcf004f9 6e8d317a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 03:17 upstream be48bcf004f9 6e8d317a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/19 00:30 upstream be48bcf004f9 6e8d317a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/18 20:32 upstream c17b750b3ad9 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/18 18:49 upstream c17b750b3ad9 1804e95e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/07/16 22:46 upstream 155a3c003e55 44f8051e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in kvm_arch_vcpu_ioctl_run
2025/08/16 09:05 linux-next 931e46dcbc7e 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in kvm_arch_vcpu_ioctl_run
* Struck through repros no longer work on HEAD.