watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:15704] Modules linked in: irq event stamp: 47510 hardirqs last enabled at (47509): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (47510): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (47470): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (47465): [] __irq_exit_rcu+0xc4/0x100 CPU: 0 UID: 0 PID: 15704 Comm: syz-executor.3 Not tainted 6.17.0-rc6-next-20250919 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:smp_call_function_many_cond+0xa38/0x1110 Code: 31 ff 83 e5 01 89 ee e8 c6 6e 0b 00 85 ed 74 43 4d 89 ec 4c 89 ed 49 c1 ec 03 83 e5 07 4d 01 fc 83 c5 03 e8 7a 73 0b 00 f3 90 <41> 0f b6 04 24 40 38 c5 7c 08 84 c0 0f 85 d5 04 00 00 8b 43 08 31 RSP: 0018:ffff88804e91f6f8 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88806cf3c740 RCX: ffffffff81688d6c RDX: ffff88800a4a8000 RSI: ffffffff81688d46 RDI: 0000000000000005 RBP: 0000000000000003 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000001 R11: 1ffff1100d9c6bb9 R12: ffffed100d9e78e9 R13: ffff88806cf3c748 R14: 0000000000000001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880e53c6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7f801d542 CR3: 0000000047bc1000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000010602 Call Trace: on_each_cpu_cond_mask+0x57/0xa0 kvm_flush_tlb_multi+0x1e8/0x320 flush_tlb_mm_range+0x3fc/0x1420 tlb_finish_mmu+0x3d5/0x7e0 exit_mmap+0x39d/0xaa0 mmput+0xd5/0x390 do_exit+0x79d/0x2970 do_group_exit+0xd3/0x2a0 get_signal+0x2311/0x2340 arch_do_signal_or_restart+0x80/0x780 exit_to_user_mode_loop+0x7d/0xf0 do_syscall_64+0x31d/0x390 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff98985cb19 Code: Unable to access opcode bytes at 0x7ff98985caef. RSP: 002b:00007ff986db1218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 00007ff989970028 RCX: 00007ff98985cb19 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff98997002c RBP: 00007ff989970020 R08: 0000000000000016 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000246 R12: 00007ff98997002c R13: 00007ffdd3e42e4f R14: 00007ff986db1300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 15697 Comm: syz-executor.4 Not tainted 6.17.0-rc6-next-20250919 #1 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:hrtimer_cancel+0x4c/0x70 Code: 00 84 db 74 27 e8 64 2c 12 00 48 89 ef e8 0c fd ff ff 31 ff 41 89 c4 89 c6 e8 80 27 12 00 45 85 e4 79 0c e8 46 2c 12 00 f3 90 bd 45 31 e4 e8 3a 2c 12 00 44 89 e0 5b 5d 41 5c e9 ae 3b 5f 03 RSP: 0018:ffff88806cf08b48 EFLAGS: 00000046 RAX: 0000000000010001 RBX: 0000000000000001 RCX: ffffffff8161d470 RDX: ffff888014343700 RSI: ffffffff8161d47a RDI: 0000000000000005 RBP: ffff88804ddaeba8 R08: 0000000000000000 R09: ffffed100d9e5010 R10: 00000000ffffffff R11: 0000000000000001 R12: 00000000ffffffff R13: ffff88804ddaec50 R14: ffff88804ddaeba8 R15: ffff88804ddaee84 FS: 00007f79a24f4700(0000) GS:ffff8880e54c6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000201e7000 CR3: 000000004bf9e000 CR4: 0000000000350ef0 Call Trace: cpu_clock_event_stop+0x106/0x140 __perf_event_overflow+0x7e4/0xcc0 perf_swevent_hrtimer+0x316/0x370 __hrtimer_run_queues+0x60f/0xac0 hrtimer_interrupt+0x369/0x830 __sysvec_apic_timer_interrupt+0xbb/0x330 sysvec_apic_timer_interrupt+0x6b/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:perf_trace_lock+0xa2/0x5d0 Code: 65 48 8b 05 a8 b0 54 06 48 89 45 d0 31 c0 4c 89 e8 48 c1 e8 03 80 3c 10 00 0f 85 e0 03 00 00 48 8b 85 50 ff ff ff 48 8b 78 18 <48> c7 c0 a0 1d e8 84 48 85 ff 48 0f 44 f8 e8 7b bf 69 03 4c 89 ea RSP: 0018:ffff88804bf8fc90 EFLAGS: 00000246 RAX: ffff888009eb8ca8 RBX: 1ffff110097f1f98 RCX: ffffc9000540b000 RDX: dffffc0000000000 RSI: ffff888009eb8ca8 RDI: ffffffff84ee6400 RBP: ffff88804bf8fd68 R08: 0000000000000001 R09: ffffed10097f1fa2 R10: fffffffffffffff9 R11: 0000000000000001 R12: ffffffff85d24620 R13: ffff888009eb8cc0 R14: ffff88804bf8fd40 R15: ffff888009eb8c00 lock_release+0x1ab/0x290 __mutex_unlock_slowpath+0x99/0x750 perf_ioctl+0x80/0xb0 __x64_sys_ioctl+0x18f/0x210 do_syscall_64+0xbf/0x390 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f79a4f7eb19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f79a24f4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f79a5091f60 RCX: 00007f79a4f7eb19 RDX: 0000000020000040 RSI: 0000000040082404 RDI: 0000000000000003 RBP: 00007f79a4fd8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe4e79609f R14: 00007f79a24f4300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 31 ff xor %edi,%edi 2: 83 e5 01 and $0x1,%ebp 5: 89 ee mov %ebp,%esi 7: e8 c6 6e 0b 00 callq 0xb6ed2 c: 85 ed test %ebp,%ebp e: 74 43 je 0x53 10: 4d 89 ec mov %r13,%r12 13: 4c 89 ed mov %r13,%rbp 16: 49 c1 ec 03 shr $0x3,%r12 1a: 83 e5 07 and $0x7,%ebp 1d: 4d 01 fc add %r15,%r12 20: 83 c5 03 add $0x3,%ebp 23: e8 7a 73 0b 00 callq 0xb73a2 28: f3 90 pause * 2a: 41 0f b6 04 24 movzbl (%r12),%eax <-- trapping instruction 2f: 40 38 c5 cmp %al,%bpl 32: 7c 08 jl 0x3c 34: 84 c0 test %al,%al 36: 0f 85 d5 04 00 00 jne 0x511 3c: 8b 43 08 mov 0x8(%rbx),%eax 3f: 31 .byte 0x31