watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:122741] Modules linked in: irq event stamp: 33964445 hardirqs last enabled at (33964444): [] irqentry_exit+0x1bc/0x700 hardirqs last disabled at (33964445): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (33950696): [] __irq_exit_rcu+0x137/0x1c0 softirqs last disabled at (33950699): [] __irq_exit_rcu+0x137/0x1c0 CPU: 0 UID: 0 PID: 122741 Comm: syz-executor.3 Not tainted 7.1.0-rc1-next-20260430 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:lock_acquire+0x5a/0x2f0 Code: 30 31 c0 eb 4b 65 8b 05 d8 64 84 06 89 c0 48 0f a3 05 ea 1e 36 05 0f 82 5f 01 00 00 8b 35 52 2c 36 05 85 f6 0f 85 aa 00 00 00 <48> 8b 44 24 30 65 48 2b 05 81 64 84 06 0f 85 78 02 00 00 48 83 c4 RSP: 0018:ffff88806cc08dd8 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000ef8d149e RDX: 00000000ef1e8ab0 RSI: 00000000006e89ee RDI: 0000000000107249 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001 R10: 00000000000000c9 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000000 R14: ffffffff860279e0 R15: 0000000000000200 FS: 00007f57ea585700(0000) GS:ffff8880e4ea0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe28e245ae0 CR3: 0000000053284000 CR4: 0000000000350ef0 Call Trace: rcu_core+0x555/0x1470 handle_softirqs+0x1b1/0x8e0 __irq_exit_rcu+0x137/0x1c0 irq_exit_rcu+0x9/0x20 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__schedule+0x1c21/0x4d00 Code: ff 48 c7 c2 c0 be 07 85 be 4f 17 00 00 48 c7 c7 60 b4 07 85 c6 05 ac 36 a2 01 01 e8 c9 a7 6e fc e9 74 e5 ff ff be ff ff ff ff <48> c7 c7 a0 7a 02 86 e8 33 2d ff ff 85 c0 0f 84 4e e5 ff ff e8 56 RSP: 0018:ffff888051c9f508 EFLAGS: 00000202 RAX: 0000000000000001 RBX: ffff88806cc37cc0 RCX: ffffffff84e46d4a RDX: 1ffff1100d986f9a RSI: 00000000ffffffff RDI: ffffffff85d2fc80 RBP: ffff888051c9f5f8 R08: 0000000000000000 R09: fffffbfff0d1374a R10: ffffffff8689ba57 R11: 0000000000000001 R12: 0000000000000001 R13: ffff888050579c40 R14: 0000000000000001 R15: 0000000000000000 preempt_schedule_irq+0x4e/0x90 irqentry_exit+0x201/0x700 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:qlist_free_all+0x28/0x130 Code: 90 90 48 8b 07 48 85 c0 0f 84 11 01 00 00 41 57 41 56 41 55 49 89 fd 41 54 49 89 f4 55 53 eb 3e 48 63 95 b8 00 00 00 48 8b 18 <48> 89 ef 48 29 d0 48 89 c6 49 89 c6 e8 77 f0 ff ff 49 89 c7 66 90 RSP: 0018:ffff888051c9f718 EFLAGS: 00000246 RAX: ffff888010676db0 RBX: ffff88800ab92940 RCX: 0000000000000000 RDX: 0000000000000170 RSI: ffffffffffffffff RDI: ffff88800e5bab40 RBP: ffff88800a49b640 R08: 0000000000000001 R09: ffffffff81b5852b R10: ffff88800e5bab40 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888051c9f750 R14: ffff88800e5bab40 R15: ffff88800e5bab40 kasan_quarantine_reduce+0x19f/0x240 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x1ee/0x650 anon_vma_clone+0x2ee/0xc30 anon_vma_fork+0x1be/0x670 dup_mmap+0xf19/0x1f20 copy_process+0x3cf8/0x76f0 kernel_clone+0x1fd/0x870 __do_sys_fork+0x94/0xd0 do_syscall_64+0x113/0x6a0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f57ed00fb19 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:00007f57ea585188 EFLAGS: 00000246 ORIG_RAX: 0000000000000039 RAX: ffffffffffffffda RBX: 00007f57ed122f60 RCX: 00007f57ed00fb19 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f57ed069f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdb35e0acf R14: 00007f57ea585300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 7.1.0-rc1-next-20260430 #1 PREEMPT(lazy) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:pv_native_safe_halt+0x1e/0x30 Code: 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 0f 1f 44 00 00 eb 0c 0f 1f 44 00 00 0f 00 2d 09 13 22 00 0f 1f 44 00 00 fb f4 3d ee 02 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 RSP: 0018:ffff88800a767e58 EFLAGS: 00000202 RAX: 0000000000d5e75b RBX: 0000000000000001 RCX: ffffffff84e3c3a7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff814dde4b RBP: 0000000000000001 R08: 0000000000000001 R09: ffffed100d9a6442 R10: ffff88806cd32213 R11: 0000000000000000 R12: dffffc0000000000 R13: ffffffff8689ba50 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880e4fa0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe28e3af650 CR3: 000000000ec9e000 CR4: 0000000000350ef0 Call Trace: default_idle+0xe/0x20 default_idle_call+0x6c/0xb0 do_idle+0x42b/0x550 cpu_startup_entry+0x4f/0x60 start_secondary+0x1bd/0x210 common_startup_64+0x13e/0x148 ---------------- Code disassembly (best guess): 0: 30 31 xor %dh,(%rcx) 2: c0 eb 4b shr $0x4b,%bl 5: 65 8b 05 d8 64 84 06 mov %gs:0x68464d8(%rip),%eax # 0x68464e4 c: 89 c0 mov %eax,%eax e: 48 0f a3 05 ea 1e 36 bt %rax,0x5361eea(%rip) # 0x5361f00 15: 05 16: 0f 82 5f 01 00 00 jb 0x17b 1c: 8b 35 52 2c 36 05 mov 0x5362c52(%rip),%esi # 0x5362c74 22: 85 f6 test %esi,%esi 24: 0f 85 aa 00 00 00 jne 0xd4 * 2a: 48 8b 44 24 30 mov 0x30(%rsp),%rax <-- trapping instruction 2f: 65 48 2b 05 81 64 84 sub %gs:0x6846481(%rip),%rax # 0x68464b8 36: 06 37: 0f 85 78 02 00 00 jne 0x2b5 3d: 48 rex.W 3e: 83 .byte 0x83 3f: c4 .byte 0xc4