[syzbot] [kvm?] [kvm-x86?] INFO: rcu detected stall in kvm_vcpu_ioctl (4)
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syzbot
Dec 26, 2025, 10:34:20 PM12/26/25
to b...@alien8.de, dave....@linux.intel.com, h...@zytor.com, k...@vger.kernel.org, linux-...@vger.kernel.org, mi...@redhat.com, pbon...@redhat.com, sea...@google.com, syzkall...@googlegroups.com, tg...@linutronix.de, vkuz...@redhat.com, x...@kernel.org
Hello,
syzbot found the following issue on:
HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b1b23d9783ee/disk-cc3aa43b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/07451939cf74/vmlinux-cc3aa43b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e5ddf385746f/bzImage-cc3aa43b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3d5461...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 1, t=10502 jiffies, g=14269, q=1142 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294965239-4294954739), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g14269 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27128 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5258 [inline]
__schedule+0x150e/0x5070 kernel/sched/core.c:6866
__schedule_loop kernel/sched/core.c:6948 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6963
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6253 Comm: syz.1.63 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:_raw_spin_unlock_irqrestore+0x4b/0x110 kernel/locking/spinlock.c:193
Code: fb 60 5a 07 48 89 44 24 48 48 c7 04 24 b3 8a b5 41 48 c7 44 24 08 96 3d b2 8d 48 c7 44 24 10 00 df 69 8b 49 89 e7 49 c1 ef 03 <48> b8 f1 f1 f1 f1 00 f3 f3 f3 49 bc 00 00 00 00 00 fc ff df 4b 89
RSP: 0018:ffffc90000007ca0 EFLAGS: 00000802
RAX: 5de15cb931505900 RBX: 0000000000000806 RCX: ffff88802eff1e80
RDX: 0000000000010000 RSI: 0000000000000806 RDI: ffff8880b8628240
RBP: ffffc90000007d30 R08: ffffffff8fc3d077 R09: 1ffffffff1f87a0e
R10: dffffc0000000000 R11: fffffbfff1f87a0f R12: ffff888078156180
R13: dffffc0000000000 R14: ffff8880b8628240 R15: 1ffff92000000f94
FS: 00007f635365c6c0(0000) GS:ffff8881259dc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31363fff CR3: 000000004c992000 CR4: 00000000003526f0
Call Trace:
<IRQ>
__run_hrtimer kernel/time/hrtimer.c:1773 [inline]
__hrtimer_run_queues+0x408/0xc30 kernel/time/hrtimer.c:1841
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 0b f4 5f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 23 6b 27 f6 65 8b 05 7c 60 5a 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900040a7320 EFLAGS: 00000206
RAX: 5de15cb931505900 RBX: 0000000000000a06 RCX: 5de15cb931505900
RDX: 0000000000000007 RSI: ffffffff8daa9dc3 RDI: 0000000000000001
RBP: ffffc900040a73b0 R08: ffffffff8fc3d077 R09: 1ffffffff1f87a0e
R10: dffffc0000000000 R11: fffffbfff1f87a0f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880b8628240 R15: 1ffff92000814e64
hrtimer_start include/linux/hrtimer.h:259 [inline]
stimer_start arch/x86/kvm/hyperv.c:682 [inline]
kvm_hv_process_stimers+0xd0a/0x16a0 arch/x86/kvm/hyperv.c:893
vcpu_enter_guest arch/x86/kvm/x86.c:11193 [inline]
vcpu_run+0x2240/0x76b0 arch/x86/kvm/x86.c:11639
kvm_arch_vcpu_ioctl_run+0x1148/0x1c90 arch/x86/kvm/x86.c:11984
kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4492
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f635278f749
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:00007f635365c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f63529e5fa0 RCX: 00007f635278f749
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f6352813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f63529e6038 R14: 00007f63529e5fa0 R15: 00007ffd5b219358
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b1b23d9783ee/disk-cc3aa43b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/07451939cf74/vmlinux-cc3aa43b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e5ddf385746f/bzImage-cc3aa43b.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3d5461...@syzkaller.appspotmail.com
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: (detected by 1, t=10502 jiffies, g=14269, q=1142 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294965239-4294954739), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g14269 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27128 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5258 [inline]
__schedule+0x150e/0x5070 kernel/sched/core.c:6866
__schedule_loop kernel/sched/core.c:6948 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6963
schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
</TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6253 Comm: syz.1.63 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:_raw_spin_unlock_irqrestore+0x4b/0x110 kernel/locking/spinlock.c:193
Code: fb 60 5a 07 48 89 44 24 48 48 c7 04 24 b3 8a b5 41 48 c7 44 24 08 96 3d b2 8d 48 c7 44 24 10 00 df 69 8b 49 89 e7 49 c1 ef 03 <48> b8 f1 f1 f1 f1 00 f3 f3 f3 49 bc 00 00 00 00 00 fc ff df 4b 89
RSP: 0018:ffffc90000007ca0 EFLAGS: 00000802
RAX: 5de15cb931505900 RBX: 0000000000000806 RCX: ffff88802eff1e80
RDX: 0000000000010000 RSI: 0000000000000806 RDI: ffff8880b8628240
RBP: ffffc90000007d30 R08: ffffffff8fc3d077 R09: 1ffffffff1f87a0e
R10: dffffc0000000000 R11: fffffbfff1f87a0f R12: ffff888078156180
R13: dffffc0000000000 R14: ffff8880b8628240 R15: 1ffff92000000f94
FS: 00007f635365c6c0(0000) GS:ffff8881259dc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31363fff CR3: 000000004c992000 CR4: 00000000003526f0
Call Trace:
<IRQ>
__run_hrtimer kernel/time/hrtimer.c:1773 [inline]
__hrtimer_run_queues+0x408/0xc30 kernel/time/hrtimer.c:1841
hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 0b f4 5f f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 23 6b 27 f6 65 8b 05 7c 60 5a 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900040a7320 EFLAGS: 00000206
RAX: 5de15cb931505900 RBX: 0000000000000a06 RCX: 5de15cb931505900
RDX: 0000000000000007 RSI: ffffffff8daa9dc3 RDI: 0000000000000001
RBP: ffffc900040a73b0 R08: ffffffff8fc3d077 R09: 1ffffffff1f87a0e
R10: dffffc0000000000 R11: fffffbfff1f87a0f R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880b8628240 R15: 1ffff92000814e64
hrtimer_start include/linux/hrtimer.h:259 [inline]
stimer_start arch/x86/kvm/hyperv.c:682 [inline]
kvm_hv_process_stimers+0xd0a/0x16a0 arch/x86/kvm/hyperv.c:893
vcpu_enter_guest arch/x86/kvm/x86.c:11193 [inline]
vcpu_run+0x2240/0x76b0 arch/x86/kvm/x86.c:11639
kvm_arch_vcpu_ioctl_run+0x1148/0x1c90 arch/x86/kvm/x86.c:11984
kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4492
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:597 [inline]
__se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f635278f749
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:00007f635365c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f63529e5fa0 RCX: 00007f635278f749
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f6352813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f63529e6038 R14: 00007f63529e5fa0 R15: 00007ffd5b219358
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
Hillf Danton
Jun 5, 2026, 5:49:12 PM (2 days ago) Jun 5
to syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com
> Date: Fri, 26 Dec 2025 19:34:18 -0800 [thread overview]
--- x/arch/x86/kvm/hyperv.c
+++ y/arch/x86/kvm/hyperv.c
@@ -657,10 +657,8 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->exp_time);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now,
- 100 * (stimer->exp_time - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer,
+ ns_to_ktime(100 * (stimer->exp_time - time_now)));
return 0;
}
stimer->exp_time = stimer->count;
@@ -679,9 +677,7 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->count);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer, ns_to_ktime(100 * (stimer->count - time_now)));
return 0;
}
--
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
> dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
#syz test
>
> syzbot found the following issue on:
>
> HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
> dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
--- x/arch/x86/kvm/hyperv.c
+++ y/arch/x86/kvm/hyperv.c
@@ -657,10 +657,8 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->exp_time);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now,
- 100 * (stimer->exp_time - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer,
+ ns_to_ktime(100 * (stimer->exp_time - time_now)));
return 0;
}
stimer->exp_time = stimer->count;
@@ -679,9 +677,7 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->count);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer, ns_to_ktime(100 * (stimer->count - time_now)));
return 0;
}
--
syzbot
Jun 5, 2026, 6:35:02 PM (2 days ago) Jun 5
to hda...@sina.com, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
4.345006][ T1] ceph: loaded (mds proto 32)
[ 4.367481][ T1] cryptd: max_cpu_qlen set to 1000
[ 4.403262][ T1] NET: Registered PF_ALG protocol family
[ 4.405387][ T1] async_tx: api initialized (async)
[ 4.407031][ T1] Key type asymmetric registered
[ 4.408147][ T1] Asymmetric key parser 'x509' registered
[ 4.409548][ T1] Asymmetric key parser 'pkcs8' registered
[ 4.411262][ T1] Key type pkcs7_test registered
[ 4.413661][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 4.417109][ T1] io scheduler mq-deadline registered
[ 4.418835][ T1] io scheduler kyber registered
[ 4.420174][ T1] io scheduler bfq registered
[ 4.438274][ T153] kworker/u8:3 (153) used greatest stack depth: 26552 bytes left
[ 4.444898][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 4.449932][ T1] ACPI: button: Power Button [PWRF]
[ 4.454623][ T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[ 4.458312][ T1] ACPI: button: Sleep Button [SLPF]
[ 4.483125][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 4.529887][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 4.531145][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 4.577964][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 4.579194][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 4.624039][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 4.625454][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 4.656998][ T1] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 4.900220][ T348] kworker/u8:4 (348) used greatest stack depth: 26504 bytes left
[ 5.424394][ T1] N_HDLC line discipline registered with maxframe=4096
[ 5.427436][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 5.447213][ T1] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 5.475555][ T1] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 5.496265][ T1] 00:04: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 5.515225][ T1] 00:05: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 5.548169][ T1] Non-volatile memory driver v1.3
[ 5.574910][ T1] usbcore: registered new interface driver xillyusb
[ 5.581624][ T1] ACPI: bus type drm_connector registered
[ 5.591822][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 5.610935][ T1] [drm] Initialized vkms 1.0.0 for vkms on minor 1
[ 5.751709][ T1] Console: switching to colour frame buffer device 128x48
[ 5.833339][ T1] faux_driver vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 5.836609][ T1] usbcore: registered new interface driver udl
[ 5.844919][ T1] usbcore: registered new interface driver gm12u320
[ 5.846877][ T1] usbcore: registered new interface driver gud
[ 5.987040][ T1] brd: module loaded
[ 6.344073][ T1] loop: module loaded
[ 6.607970][ T954] kworker/u8:6 (954) used greatest stack depth: 25896 bytes left
[ 6.679111][ T1] zram: Added device: zram0
[ 6.706095][ T1] null_blk: disk nullb0 created
[ 6.711191][ T1] null_blk: module loaded
[ 6.715539][ T1] rnull_mod: Rust null_blk loaded
[ 6.725205][ T1] Guest personality initialized and is inactive
[ 6.733736][ T1] VMCI host device registered (name=vmci, major=10, minor=266)
[ 6.741861][ T1] Initialized host personality
[ 6.748191][ T1] usbcore: registered new interface driver rtsx_usb
[ 6.760603][ T1] usbcore: registered new interface driver viperboard
[ 6.770242][ T1] usbcore: registered new interface driver dln2
[ 6.779712][ T1] usbcore: registered new interface driver pn533_usb
[ 6.796211][ T1] nfcsim 0.2 initialized
[ 6.801484][ T1] usbcore: registered new interface driver port100
[ 6.810273][ T1] usbcore: registered new interface driver nfcmrvl
[ 6.832841][ T1] Loading iSCSI transport class v2.0-870.
[ 6.862030][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 6.890608][ T1] scsi host0: Virtio SCSI HBA
[ 6.896662][ T1] blk-mq: reduced tag depth to 10240
[ 7.107338][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 7.127307][ T57] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
[ 7.154202][ T1] ------------[ cut here ]------------
[ 7.160329][ T1] workqueue: nvme_tcp_wq is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
[ 7.170094][ T1] WARNING: kernel/workqueue.c:5856 at __alloc_workqueue+0x1994/0x1cf0, CPU#0: swapper/0/1
[ 7.180068][ T1] Modules linked in:
[ 7.184027][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 7.193102][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 7.203500][ T1] RIP: 0010:__alloc_workqueue+0x1999/0x1cf0
[ 7.209644][ T1] Code: e9 46 ef ff ff e8 c7 16 38 00 e9 9f fc ff ff e8 bd 16 38 00 e9 30 fd ff ff e8 b3 16 38 00 48 8d 3d 1c d8 7d 0e 48 8b 74 24 20 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 f7 e8 ff ff e8 91 16 38 00
[ 7.230320][ T1] RSP: 0000:ffffc900000677a8 EFLAGS: 00010293
[ 7.236532][ T1] RAX: ffffffff818d2a8d RBX: 0000000000000000 RCX: ffff88801daedd00
[ 7.244726][ T1] RDX: 0000000000000000 RSI: ffff8880270b6170 RDI: ffffffff900b02b0
[ 7.254397][ T1] RBP: ffffffff8c379240 R08: ffff88801daedd00 R09: 0000000000000002
[ 7.262441][ T1] R10: 0000000000000102 R11: 0000000000000000 R12: dffffc0000000000
[ 7.270814][ T1] R13: ffffc900000678c0 R14: ffff8880270b6000 R15: 0000000000000058
[ 7.279041][ T1] FS: 0000000000000000(0000) GS:ffff8881254f4000(0000) knlGS:0000000000000000
[ 7.288031][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.294621][ T1] CR2: ffff88823ffff000 CR3: 000000000e53e000 CR4: 00000000003526f0
[ 7.302652][ T1] Call Trace:
[ 7.305961][ T1] <TASK>
[ 7.308904][ T1] ? do_raw_spin_lock+0x12b/0x2f0
[ 7.313950][ T1] alloc_workqueue_noprof+0xe3/0x210
[ 7.319304][ T1] ? __pfx_alloc_workqueue_noprof+0x10/0x10
[ 7.325207][ T1] ? add_device_randomness+0xc5/0x110
[ 7.331134][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 7.337091][ T1] ? __pfx_nvme_fc_init_module+0x10/0x10
[ 7.342915][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.348707][ T1] nvme_tcp_init_module+0x27/0x100
[ 7.353921][ T1] do_one_initcall+0x250/0x870
[ 7.358983][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.364733][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.370175][ T1] ? ktime_get+0x45/0x220
[ 7.374610][ T1] ? ktime_get+0x1f5/0x220
[ 7.379101][ T1] ? __pfx___schedule+0x10/0x10
[ 7.384151][ T1] ? clockevents_program_event+0x491/0x630
[ 7.390074][ T1] ? __pfx_clockevents_program_event+0x10/0x10
[ 7.396384][ T1] ? irqentry_exit+0x218/0x760
[ 7.401331][ T1] ? lockdep_hardirqs_on+0x7a/0x110
[ 7.406854][ T1] ? irqentry_exit+0x218/0x760
[ 7.411648][ T1] ? trace_irq_disable+0x3b/0x140
[ 7.416940][ T1] ? next_arg+0x498/0x5e0
[ 7.421299][ T1] ? parameq+0x14d/0x170
[ 7.425559][ T1] ? parse_args+0x9fc/0xb00
[ 7.430132][ T1] ? trace_kmalloc+0x2a/0xf0
[ 7.434829][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.439674][ T1] do_initcall_level+0x104/0x190
[ 7.444644][ T1] ? kernel_init+0x1d/0x1d0
[ 7.449217][ T1] do_initcalls+0x59/0xa0
[ 7.453648][ T1] kernel_init_freeable+0x2a6/0x3e0
[ 7.459860][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.464820][ T1] kernel_init+0x1d/0x1d0
[ 7.469306][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.474438][ T1] ret_from_fork+0x514/0xb70
[ 7.479092][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 7.484220][ T1] ? __switch_to+0xc79/0x1410
[ 7.488968][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.494014][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.498839][ T1] </TASK>
[ 7.501873][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 7.508790][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 7.508790][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 7.508790][ T1] Call Trace:
[ 7.508790][ T1] <TASK>
[ 7.508790][ T1] vpanic+0x56c/0xa60
[ 7.508790][ T1] ? __pfx__printk+0x10/0x10
[ 7.508790][ T1] ? __pfx_vpanic+0x10/0x10
[ 7.508790][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 7.508790][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 7.508790][ T1] panic+0xc5/0xd0
[ 7.508790][ T1] ? __pfx_panic+0x10/0x10
[ 7.508790][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.508790][ T1] __warn+0x315/0x4c0
[ 7.508790][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.508790][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.508790][ T1] __report_bug+0x339/0x540
[ 7.508790][ T1] ? kernel_init+0x1d/0x1d0
[ 7.508790][ T1] ? ret_from_fork+0x514/0xb70
[ 7.508790][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.605760][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.605760][ T1] ? __pfx___report_bug+0x10/0x10
[ 7.605760][ T1] report_bug_entry+0x19a/0x290
[ 7.605760][ T1] ? __alloc_workqueue+0x1999/0x1cf0
[ 7.605760][ T1] ? __alloc_workqueue+0x199e/0x1cf0
[ 7.605760][ T1] handle_bug+0xce/0x200
[ 7.605760][ T1] exc_invalid_op+0x1a/0x50
[ 7.605760][ T1] asm_exc_invalid_op+0x1a/0x20
[ 7.605760][ T1] RIP: 0010:__alloc_workqueue+0x1999/0x1cf0
[ 7.605760][ T1] Code: e9 46 ef ff ff e8 c7 16 38 00 e9 9f fc ff ff e8 bd 16 38 00 e9 30 fd ff ff e8 b3 16 38 00 48 8d 3d 1c d8 7d 0e 48 8b 74 24 20 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 f7 e8 ff ff e8 91 16 38 00
[ 7.605760][ T1] RSP: 0000:ffffc900000677a8 EFLAGS: 00010293
[ 7.605760][ T1] RAX: ffffffff818d2a8d RBX: 0000000000000000 RCX: ffff88801daedd00
[ 7.605760][ T1] RDX: 0000000000000000 RSI: ffff8880270b6170 RDI: ffffffff900b02b0
[ 7.605760][ T1] RBP: ffffffff8c379240 R08: ffff88801daedd00 R09: 0000000000000002
[ 7.605760][ T1] R10: 0000000000000102 R11: 0000000000000000 R12: dffffc0000000000
[ 7.705788][ T1] R13: ffffc900000678c0 R14: ffff8880270b6000 R15: 0000000000000058
[ 7.705788][ T1] ? __alloc_workqueue+0x198d/0x1cf0
[ 7.705788][ T1] ? __alloc_workqueue+0x198d/0x1cf0
[ 7.705788][ T1] ? do_raw_spin_lock+0x12b/0x2f0
[ 7.705788][ T1] alloc_workqueue_noprof+0xe3/0x210
[ 7.705788][ T1] ? __pfx_alloc_workqueue_noprof+0x10/0x10
[ 7.705788][ T1] ? add_device_randomness+0xc5/0x110
[ 7.705788][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 7.705788][ T1] ? __pfx_nvme_fc_init_module+0x10/0x10
[ 7.705788][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.705788][ T1] nvme_tcp_init_module+0x27/0x100
[ 7.705788][ T1] do_one_initcall+0x250/0x870
[ 7.705788][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.705788][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.705788][ T1] ? ktime_get+0x45/0x220
[ 7.705788][ T1] ? ktime_get+0x1f5/0x220
[ 7.705788][ T1] ? __pfx___schedule+0x10/0x10
[ 7.806065][ T1] ? clockevents_program_event+0x491/0x630
[ 7.806065][ T1] ? __pfx_clockevents_program_event+0x10/0x10
[ 7.806065][ T1] ? irqentry_exit+0x218/0x760
[ 7.806065][ T1] ? lockdep_hardirqs_on+0x7a/0x110
[ 7.806065][ T1] ? irqentry_exit+0x218/0x760
[ 7.806065][ T1] ? trace_irq_disable+0x3b/0x140
[ 7.806065][ T1] ? next_arg+0x498/0x5e0
[ 7.806065][ T1] ? parameq+0x14d/0x170
[ 7.806065][ T1] ? parse_args+0x9fc/0xb00
[ 7.806065][ T1] ? trace_kmalloc+0x2a/0xf0
[ 7.806065][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.806065][ T1] do_initcall_level+0x104/0x190
[ 7.806065][ T1] ? kernel_init+0x1d/0x1d0
[ 7.806065][ T1] do_initcalls+0x59/0xa0
[ 7.806065][ T1] kernel_init_freeable+0x2a6/0x3e0
[ 7.806065][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.806065][ T1] kernel_init+0x1d/0x1d0
[ 7.806065][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.806065][ T1] ret_from_fork+0x514/0xb70
[ 7.806065][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 7.905740][ T1] ? __switch_to+0xc79/0x1410
[ 7.905740][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.905740][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.905740][ T1] </TASK>
[ 7.905740][ T1] Kernel Offset: disabled
[ 7.905740][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build138220988=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at d6526ea3e6a
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/bin/ld: /tmp/ccWbRLbh.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=130bf3ec580000
Tested on:
commit: 6e845bcb Add linux-next specific files for 20260605
git tree: linux-next
kernel config: https://syzkaller.appspot.com/x/.config?x=8112d5f46200717e
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=1272fdd2580000
syzbot tried to test the proposed patch but the build/boot failed:
4.345006][ T1] ceph: loaded (mds proto 32)
[ 4.367481][ T1] cryptd: max_cpu_qlen set to 1000
[ 4.403262][ T1] NET: Registered PF_ALG protocol family
[ 4.405387][ T1] async_tx: api initialized (async)
[ 4.407031][ T1] Key type asymmetric registered
[ 4.408147][ T1] Asymmetric key parser 'x509' registered
[ 4.409548][ T1] Asymmetric key parser 'pkcs8' registered
[ 4.411262][ T1] Key type pkcs7_test registered
[ 4.413661][ T1] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 239)
[ 4.417109][ T1] io scheduler mq-deadline registered
[ 4.418835][ T1] io scheduler kyber registered
[ 4.420174][ T1] io scheduler bfq registered
[ 4.438274][ T153] kworker/u8:3 (153) used greatest stack depth: 26552 bytes left
[ 4.444898][ T1] input: Power Button as /devices/platform/LNXPWRBN:00/input/input0
[ 4.449932][ T1] ACPI: button: Power Button [PWRF]
[ 4.454623][ T1] input: Sleep Button as /devices/platform/LNXSLPBN:00/input/input1
[ 4.458312][ T1] ACPI: button: Sleep Button [SLPF]
[ 4.483125][ T1] ioatdma: Intel(R) QuickData Technology Driver 5.00
[ 4.529887][ T1] ACPI: \_SB_.LNKC: Enabled at IRQ 11
[ 4.531145][ T1] virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
[ 4.577964][ T1] ACPI: \_SB_.LNKD: Enabled at IRQ 10
[ 4.579194][ T1] virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
[ 4.624039][ T1] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 4.625454][ T1] virtio-pci 0000:00:06.0: virtio_pci: leaving for legacy driver
[ 4.656998][ T1] virtio-pci 0000:00:07.0: virtio_pci: leaving for legacy driver
[ 4.900220][ T348] kworker/u8:4 (348) used greatest stack depth: 26504 bytes left
[ 5.424394][ T1] N_HDLC line discipline registered with maxframe=4096
[ 5.427436][ T1] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ 5.447213][ T1] 00:02: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
[ 5.475555][ T1] 00:03: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
[ 5.496265][ T1] 00:04: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
[ 5.515225][ T1] 00:05: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
[ 5.548169][ T1] Non-volatile memory driver v1.3
[ 5.574910][ T1] usbcore: registered new interface driver xillyusb
[ 5.581624][ T1] ACPI: bus type drm_connector registered
[ 5.591822][ T1] [drm] Initialized vgem 1.0.0 for vgem on minor 0
[ 5.610935][ T1] [drm] Initialized vkms 1.0.0 for vkms on minor 1
[ 5.751709][ T1] Console: switching to colour frame buffer device 128x48
[ 5.833339][ T1] faux_driver vkms: [drm] fb0: vkmsdrmfb frame buffer device
[ 5.836609][ T1] usbcore: registered new interface driver udl
[ 5.844919][ T1] usbcore: registered new interface driver gm12u320
[ 5.846877][ T1] usbcore: registered new interface driver gud
[ 5.987040][ T1] brd: module loaded
[ 6.344073][ T1] loop: module loaded
[ 6.607970][ T954] kworker/u8:6 (954) used greatest stack depth: 25896 bytes left
[ 6.679111][ T1] zram: Added device: zram0
[ 6.706095][ T1] null_blk: disk nullb0 created
[ 6.711191][ T1] null_blk: module loaded
[ 6.715539][ T1] rnull_mod: Rust null_blk loaded
[ 6.725205][ T1] Guest personality initialized and is inactive
[ 6.733736][ T1] VMCI host device registered (name=vmci, major=10, minor=266)
[ 6.741861][ T1] Initialized host personality
[ 6.748191][ T1] usbcore: registered new interface driver rtsx_usb
[ 6.760603][ T1] usbcore: registered new interface driver viperboard
[ 6.770242][ T1] usbcore: registered new interface driver dln2
[ 6.779712][ T1] usbcore: registered new interface driver pn533_usb
[ 6.796211][ T1] nfcsim 0.2 initialized
[ 6.801484][ T1] usbcore: registered new interface driver port100
[ 6.810273][ T1] usbcore: registered new interface driver nfcmrvl
[ 6.832841][ T1] Loading iSCSI transport class v2.0-870.
[ 6.862030][ T1] virtio_scsi virtio0: 1/0/0 default/read/poll queues
[ 6.890608][ T1] scsi host0: Virtio SCSI HBA
[ 6.896662][ T1] blk-mq: reduced tag depth to 10240
[ 7.107338][ T1] st: Version 20160209, fixed bufsize 32768, s/g segs 256
[ 7.127307][ T57] scsi 0:0:1:0: Direct-Access Google PersistentDisk 1 PQ: 0 ANSI: 6
[ 7.154202][ T1] ------------[ cut here ]------------
[ 7.160329][ T1] workqueue: nvme_tcp_wq is using neither WQ_PERCPU or WQ_UNBOUND. Setting WQ_PERCPU.
[ 7.170094][ T1] WARNING: kernel/workqueue.c:5856 at __alloc_workqueue+0x1994/0x1cf0, CPU#0: swapper/0/1
[ 7.180068][ T1] Modules linked in:
[ 7.184027][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 7.193102][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 7.203500][ T1] RIP: 0010:__alloc_workqueue+0x1999/0x1cf0
[ 7.209644][ T1] Code: e9 46 ef ff ff e8 c7 16 38 00 e9 9f fc ff ff e8 bd 16 38 00 e9 30 fd ff ff e8 b3 16 38 00 48 8d 3d 1c d8 7d 0e 48 8b 74 24 20 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 f7 e8 ff ff e8 91 16 38 00
[ 7.230320][ T1] RSP: 0000:ffffc900000677a8 EFLAGS: 00010293
[ 7.236532][ T1] RAX: ffffffff818d2a8d RBX: 0000000000000000 RCX: ffff88801daedd00
[ 7.244726][ T1] RDX: 0000000000000000 RSI: ffff8880270b6170 RDI: ffffffff900b02b0
[ 7.254397][ T1] RBP: ffffffff8c379240 R08: ffff88801daedd00 R09: 0000000000000002
[ 7.262441][ T1] R10: 0000000000000102 R11: 0000000000000000 R12: dffffc0000000000
[ 7.270814][ T1] R13: ffffc900000678c0 R14: ffff8880270b6000 R15: 0000000000000058
[ 7.279041][ T1] FS: 0000000000000000(0000) GS:ffff8881254f4000(0000) knlGS:0000000000000000
[ 7.288031][ T1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 7.294621][ T1] CR2: ffff88823ffff000 CR3: 000000000e53e000 CR4: 00000000003526f0
[ 7.302652][ T1] Call Trace:
[ 7.305961][ T1] <TASK>
[ 7.308904][ T1] ? do_raw_spin_lock+0x12b/0x2f0
[ 7.313950][ T1] alloc_workqueue_noprof+0xe3/0x210
[ 7.319304][ T1] ? __pfx_alloc_workqueue_noprof+0x10/0x10
[ 7.325207][ T1] ? add_device_randomness+0xc5/0x110
[ 7.331134][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 7.337091][ T1] ? __pfx_nvme_fc_init_module+0x10/0x10
[ 7.342915][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.348707][ T1] nvme_tcp_init_module+0x27/0x100
[ 7.353921][ T1] do_one_initcall+0x250/0x870
[ 7.358983][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.364733][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.370175][ T1] ? ktime_get+0x45/0x220
[ 7.374610][ T1] ? ktime_get+0x1f5/0x220
[ 7.379101][ T1] ? __pfx___schedule+0x10/0x10
[ 7.384151][ T1] ? clockevents_program_event+0x491/0x630
[ 7.390074][ T1] ? __pfx_clockevents_program_event+0x10/0x10
[ 7.396384][ T1] ? irqentry_exit+0x218/0x760
[ 7.401331][ T1] ? lockdep_hardirqs_on+0x7a/0x110
[ 7.406854][ T1] ? irqentry_exit+0x218/0x760
[ 7.411648][ T1] ? trace_irq_disable+0x3b/0x140
[ 7.416940][ T1] ? next_arg+0x498/0x5e0
[ 7.421299][ T1] ? parameq+0x14d/0x170
[ 7.425559][ T1] ? parse_args+0x9fc/0xb00
[ 7.430132][ T1] ? trace_kmalloc+0x2a/0xf0
[ 7.434829][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.439674][ T1] do_initcall_level+0x104/0x190
[ 7.444644][ T1] ? kernel_init+0x1d/0x1d0
[ 7.449217][ T1] do_initcalls+0x59/0xa0
[ 7.453648][ T1] kernel_init_freeable+0x2a6/0x3e0
[ 7.459860][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.464820][ T1] kernel_init+0x1d/0x1d0
[ 7.469306][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.474438][ T1] ret_from_fork+0x514/0xb70
[ 7.479092][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 7.484220][ T1] ? __switch_to+0xc79/0x1410
[ 7.488968][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.494014][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.498839][ T1] </TASK>
[ 7.501873][ T1] Kernel panic - not syncing: kernel: panic_on_warn set ...
[ 7.508790][ T1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full)
[ 7.508790][ T1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
[ 7.508790][ T1] Call Trace:
[ 7.508790][ T1] <TASK>
[ 7.508790][ T1] vpanic+0x56c/0xa60
[ 7.508790][ T1] ? __pfx__printk+0x10/0x10
[ 7.508790][ T1] ? __pfx_vpanic+0x10/0x10
[ 7.508790][ T1] ? is_bpf_text_address+0x292/0x2b0
[ 7.508790][ T1] ? is_bpf_text_address+0x26/0x2b0
[ 7.508790][ T1] panic+0xc5/0xd0
[ 7.508790][ T1] ? __pfx_panic+0x10/0x10
[ 7.508790][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.508790][ T1] __warn+0x315/0x4c0
[ 7.508790][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.508790][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.508790][ T1] __report_bug+0x339/0x540
[ 7.508790][ T1] ? kernel_init+0x1d/0x1d0
[ 7.508790][ T1] ? ret_from_fork+0x514/0xb70
[ 7.508790][ T1] ? ret_from_fork_asm+0x1a/0x30
[ 7.605760][ T1] ? __alloc_workqueue+0x1994/0x1cf0
[ 7.605760][ T1] ? __pfx___report_bug+0x10/0x10
[ 7.605760][ T1] report_bug_entry+0x19a/0x290
[ 7.605760][ T1] ? __alloc_workqueue+0x1999/0x1cf0
[ 7.605760][ T1] ? __alloc_workqueue+0x199e/0x1cf0
[ 7.605760][ T1] handle_bug+0xce/0x200
[ 7.605760][ T1] exc_invalid_op+0x1a/0x50
[ 7.605760][ T1] asm_exc_invalid_op+0x1a/0x20
[ 7.605760][ T1] RIP: 0010:__alloc_workqueue+0x1999/0x1cf0
[ 7.605760][ T1] Code: e9 46 ef ff ff e8 c7 16 38 00 e9 9f fc ff ff e8 bd 16 38 00 e9 30 fd ff ff e8 b3 16 38 00 48 8d 3d 1c d8 7d 0e 48 8b 74 24 20 <67> 48 0f b9 3a 41 81 cf 00 01 00 00 e9 f7 e8 ff ff e8 91 16 38 00
[ 7.605760][ T1] RSP: 0000:ffffc900000677a8 EFLAGS: 00010293
[ 7.605760][ T1] RAX: ffffffff818d2a8d RBX: 0000000000000000 RCX: ffff88801daedd00
[ 7.605760][ T1] RDX: 0000000000000000 RSI: ffff8880270b6170 RDI: ffffffff900b02b0
[ 7.605760][ T1] RBP: ffffffff8c379240 R08: ffff88801daedd00 R09: 0000000000000002
[ 7.605760][ T1] R10: 0000000000000102 R11: 0000000000000000 R12: dffffc0000000000
[ 7.705788][ T1] R13: ffffc900000678c0 R14: ffff8880270b6000 R15: 0000000000000058
[ 7.705788][ T1] ? __alloc_workqueue+0x198d/0x1cf0
[ 7.705788][ T1] ? __alloc_workqueue+0x198d/0x1cf0
[ 7.705788][ T1] ? do_raw_spin_lock+0x12b/0x2f0
[ 7.705788][ T1] alloc_workqueue_noprof+0xe3/0x210
[ 7.705788][ T1] ? __pfx_alloc_workqueue_noprof+0x10/0x10
[ 7.705788][ T1] ? add_device_randomness+0xc5/0x110
[ 7.705788][ T1] ? __pfx_add_device_randomness+0x10/0x10
[ 7.705788][ T1] ? __pfx_nvme_fc_init_module+0x10/0x10
[ 7.705788][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.705788][ T1] nvme_tcp_init_module+0x27/0x100
[ 7.705788][ T1] do_one_initcall+0x250/0x870
[ 7.705788][ T1] ? __pfx_nvme_tcp_init_module+0x10/0x10
[ 7.705788][ T1] ? __pfx_do_one_initcall+0x10/0x10
[ 7.705788][ T1] ? ktime_get+0x45/0x220
[ 7.705788][ T1] ? ktime_get+0x1f5/0x220
[ 7.705788][ T1] ? __pfx___schedule+0x10/0x10
[ 7.806065][ T1] ? clockevents_program_event+0x491/0x630
[ 7.806065][ T1] ? __pfx_clockevents_program_event+0x10/0x10
[ 7.806065][ T1] ? irqentry_exit+0x218/0x760
[ 7.806065][ T1] ? lockdep_hardirqs_on+0x7a/0x110
[ 7.806065][ T1] ? irqentry_exit+0x218/0x760
[ 7.806065][ T1] ? trace_irq_disable+0x3b/0x140
[ 7.806065][ T1] ? next_arg+0x498/0x5e0
[ 7.806065][ T1] ? parameq+0x14d/0x170
[ 7.806065][ T1] ? parse_args+0x9fc/0xb00
[ 7.806065][ T1] ? trace_kmalloc+0x2a/0xf0
[ 7.806065][ T1] ? rcu_is_watching+0x15/0xb0
[ 7.806065][ T1] do_initcall_level+0x104/0x190
[ 7.806065][ T1] ? kernel_init+0x1d/0x1d0
[ 7.806065][ T1] do_initcalls+0x59/0xa0
[ 7.806065][ T1] kernel_init_freeable+0x2a6/0x3e0
[ 7.806065][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.806065][ T1] kernel_init+0x1d/0x1d0
[ 7.806065][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.806065][ T1] ret_from_fork+0x514/0xb70
[ 7.806065][ T1] ? __pfx_ret_from_fork+0x10/0x10
[ 7.905740][ T1] ? __switch_to+0xc79/0x1410
[ 7.905740][ T1] ? __pfx_kernel_init+0x10/0x10
[ 7.905740][ T1] ret_from_fork_asm+0x1a/0x30
[ 7.905740][ T1] </TASK>
[ 7.905740][ T1] Kernel Offset: disabled
[ 7.905740][ T1] Rebooting in 86400 seconds..
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build138220988=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs-2/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs-2/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs-2/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at d6526ea3e6a
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=amd64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d6526ea3e6ad9081c902859bbb80f9f840377cb4 -X github.com/google/syzkaller/prog.gitRevisionDate=20251126-113115" -o ./bin/linux_amd64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_amd64
g++ -o ./bin/linux_amd64/syz-executor executor/executor.cc \
-m64 -O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_amd64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d6526ea3e6ad9081c902859bbb80f9f840377cb4\"
/usr/bin/ld: /tmp/ccWbRLbh.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x386): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Error text is too large and was truncated, full error text is at:
https://syzkaller.appspot.com/x/error.txt?x=130bf3ec580000
Tested on:
commit: 6e845bcb Add linux-next specific files for 20260605
git tree: linux-next
kernel config: https://syzkaller.appspot.com/x/.config?x=8112d5f46200717e
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=1272fdd2580000
Hillf Danton
Jun 6, 2026, 2:15:21 AM (yesterday) Jun 6
to syzbot, linux-...@vger.kernel.org, syzkall...@googlegroups.com
> Date: Fri, 26 Dec 2025 19:34:18 -0800 [thread overview]
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
> dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
>
> syzbot found the following issue on:
>
> HEAD commit: cc3aa43b44bd Add linux-next specific files for 20251219
> git tree: linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=1252109a580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=f7a09bf3b9133d9d
> dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
> compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14eb1022580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13cc18fc580000
#syz test
--- x/arch/x86/kvm/hyperv.c
+++ y/arch/x86/kvm/hyperv.c
@@ -657,10 +657,8 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->exp_time);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now,
- 100 * (stimer->exp_time - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer,
+ ns_to_ktime(100 * (stimer->exp_time - time_now)));
return 0;
}
stimer->exp_time = stimer->count;
@@ -679,9 +677,7 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->count);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer, ns_to_ktime(100 * (stimer->count - time_now)));
return 0;
}
--- x/drivers/nvme/host/tcp.c
--- x/arch/x86/kvm/hyperv.c
+++ y/arch/x86/kvm/hyperv.c
@@ -657,10 +657,8 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->exp_time);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now,
- 100 * (stimer->exp_time - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer,
+ ns_to_ktime(100 * (stimer->exp_time - time_now)));
return 0;
}
stimer->exp_time = stimer->count;
@@ -679,9 +677,7 @@ static int stimer_start(struct kvm_vcpu_
stimer->index,
time_now, stimer->count);
- hrtimer_start(&stimer->timer,
- ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
- HRTIMER_MODE_ABS);
+ hrtimer_forward_now(&stimer->timer, ns_to_ktime(100 * (stimer->count - time_now)));
return 0;
}
+++ y/drivers/nvme/host/tcp.c
@@ -3046,6 +3046,8 @@ static int __init nvme_tcp_init_module(v
if (wq_unbound)
wq_flags |= WQ_UNBOUND;
+ else
+ wq_flags |= WQ_PERCPU;
nvme_tcp_wq = alloc_workqueue("nvme_tcp_wq", wq_flags, 0);
if (!nvme_tcp_wq)
--
syzbot
Jun 6, 2026, 2:44:05 AM (yesterday) Jun 6
to hda...@sina.com, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
lost connection to test machine
Tested on:
commit: 6e845bcb Add linux-next specific files for 20260605
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1219fdd2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8112d5f46200717e
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
lost connection to test machine
Tested on:
commit: 6e845bcb Add linux-next specific files for 20260605
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=1219fdd2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8112d5f46200717e
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
patch: https://syzkaller.appspot.com/x/patch.diff?x=146bda86580000
syzbot
Jun 6, 2026, 11:10:03 AM (17 hours ago) Jun 6
to clo...@suse.de, linux-...@vger.kernel.org, syzkall...@googlegroups.com
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
lost connection to test machine
Tested on:
commit: 5a40f3f6 KVM: x86: hyper-v: Clamp stimer deadline to a..
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
lost connection to test machine
Tested on:
git tree: https://github.com/00xc/linux.git kvm/x86/hyperv-stimer-overflow
console output: https://syzkaller.appspot.com/x/log.txt?x=10354f2e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=975c59d5c8924004
dashboard link: https://syzkaller.appspot.com/bug?extid=3d5461510f8dc4adfe30
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
Note: no patches were applied.
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
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