watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.4:11678] Modules linked in: irq event stamp: 2532325 hardirqs last enabled at (2532324): [] irqentry_exit+0x3b/0x90 hardirqs last disabled at (2532325): [] sysvec_apic_timer_interrupt+0xf/0x80 softirqs last enabled at (2518578): [] handle_softirqs+0x50c/0x770 softirqs last disabled at (2518581): [] irq_exit_rcu+0x94/0xc0 CPU: 0 UID: 0 PID: 11678 Comm: syz-executor.4 Not tainted 6.12.0-rc3-next-20241016 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:unwind_next_frame+0x1b0/0x2490 Code: 42 ff 39 c6 0f 83 bb 16 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 ec e7 c1 86 49 89 f8 49 c1 e8 03 45 0f b6 04 00 <48> 89 f8 83 e0 07 83 c0 03 44 38 c0 7c 32 45 84 c0 74 2d 48 89 54 RSP: 0018:ffff88806ce084f8 EFLAGS: 00000213 RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff818f725b RDX: 0000000000008f72 RSI: 0000000000008f72 RDI: ffffffff86c425b4 RBP: ffff88806ce085c0 R08: 0000000000000000 R09: ffff88806ce085a8 R10: 000000000003c001 R11: 0000000000026625 R12: ffff88806ce085c8 R13: ffff88806ce085b0 R14: ffff88806ce085a9 R15: ffff88806ce08568 FS: 00007f414d4c3700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd62d4ee18 CR3: 000000002c948000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: arch_stack_walk+0x87/0xf0 stack_trace_save+0x8f/0xc0 kasan_save_stack+0x24/0x50 kasan_save_track+0x14/0x30 __kasan_slab_alloc+0x59/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 __alloc_object+0x2f/0x270 __create_object+0x1d/0x80 kmem_cache_alloc_noprof+0x300/0x3d0 skb_clone+0x191/0x400 dev_queue_xmit_nit+0x39a/0xbc0 dev_hard_start_xmit+0xc9/0x740 sch_direct_xmit+0x26c/0x810 __dev_queue_xmit+0x1ad7/0x3d30 ip_finish_output2+0x1484/0x20e0 __ip_finish_output.part.0+0x1bb/0x350 ip_output+0x27f/0x850 ip_local_out+0x359/0x4c0 __ip_queue_xmit+0x770/0x1910 __tcp_transmit_skb+0x2884/0x39a0 __tcp_send_ack.part.0+0x3a6/0x650 tcp_send_ack+0x81/0xa0 __tcp_ack_snd_check+0x188/0xc20 tcp_rcv_established+0x96c/0x2140 tcp_v4_do_rcv+0x5cf/0xa50 tcp_v4_rcv+0x31a0/0x42d0 ip_protocol_deliver_rcu+0xba/0x480 ip_local_deliver_finish+0x2f0/0x500 ip_local_deliver+0x1a3/0x200 ip_sublist_rcv_finish+0x274/0x570 ip_list_rcv_finish.constprop.0+0x3fe/0x580 ip_list_rcv+0x2c5/0x3e0 __netif_receive_skb_list_core+0x695/0x8d0 netif_receive_skb_list_internal+0x6c2/0xc90 napi_gro_receive+0x994/0xbb0 e1000_clean_rx_irq+0x7e1/0x11a0 e1000_clean+0x963/0x2500 __napi_poll+0xb9/0x540 net_rx_action+0xa06/0xe00 handle_softirqs+0x1b1/0x770 irq_exit_rcu+0x94/0xc0 sysvec_apic_timer_interrupt+0x70/0x80 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:___cache_free+0x6c/0xf0 Code: 89 c2 f6 c2 01 0f 85 80 00 00 00 66 90 41 80 7a 33 f5 b8 00 00 00 00 4c 0f 45 d0 65 48 8b 05 43 d1 7d 7e 48 03 07 48 8b 50 08 <4c> 39 50 10 75 42 8b 4f 28 48 8b 00 48 89 04 0b 48 8d 4a 40 48 8b RSP: 0018:ffff888040a67c58 EFLAGS: 00000282 RAX: ffff88806ce400b0 RBX: ffff88803f63dc80 RCX: ffffea0000fd8f40 RDX: 0000000000008d40 RSI: ffff88803f63dc80 RDI: ffff888008c4dc80 RBP: ffff888040a67c60 R08: ffff888016406f00 R09: ffffffff818b43cb R10: ffffea0000fd8f40 R11: 00000000000007e0 R12: 0000000000000000 R13: ffff888040a67ca8 R14: ffff88803f63dc80 R15: ffff88803f63dc80 qlist_free_all+0x50/0x160 kasan_quarantine_reduce+0x19c/0x230 __kasan_slab_alloc+0x49/0x70 kmem_cache_alloc_noprof+0x13d/0x3d0 getname_flags.part.0+0x48/0x550 getname+0x8f/0xd0 do_sys_openat2+0xec/0x1d0 __x64_sys_openat+0x143/0x200 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f414ff00a04 Code: 84 00 00 00 00 00 44 89 54 24 0c e8 96 f9 ff ff 44 8b 54 24 0c 44 89 e2 48 89 ee 41 89 c0 bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 89 44 24 0c e8 c8 f9 ff ff 8b 44 RSP: 002b:00007f414d4c3060 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f4150060f60 RCX: 00007f414ff00a04 RDX: 0000000000000002 RSI: 00007f414d4c30f0 RDI: 00000000ffffff9c RBP: 00007f414d4c30f0 R08: 0000000000000000 R09: 00007f414d4c2f70 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffe3909075f R14: 00007f414d4c3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 251 Comm: sshd Not tainted 6.12.0-rc3-next-20241016 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:queued_spin_lock_slowpath+0x242/0xb60 Code: 02 48 89 e8 83 e0 07 83 c0 01 38 d0 7c 08 84 d2 0f 85 85 08 00 00 b8 01 00 00 00 66 89 45 00 e9 bf fe ff ff 89 44 24 38 f3 90 5b fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 RSP: 0018:ffff8880166f78d0 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff84845a6f RDX: ffffed10026a2679 RSI: 0000000000000004 RDI: ffff8880135133c0 RBP: ffff8880135133c0 R08: 0000000000000000 R09: ffffed10026a2678 R10: ffff8880135133c3 R11: 0000000000000001 R12: 1ffff11002cdef1b R13: 0000000000000003 R14: ffffed10026a2678 R15: ffff8880166f7908 FS: 00007f7c08255900(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feff8254028 CR3: 0000000009c14000 CR4: 0000000000350ef0 Call Trace: do_raw_spin_lock+0x1de/0x270 lock_sock_nested+0x5f/0xf0 tcp_recvmsg+0xf8/0x630 inet_recvmsg+0x12b/0x6b0 sock_recvmsg+0x198/0x240 sock_read_iter+0x2bb/0x3b0 vfs_read+0xa1c/0xbc0 ksys_read+0x1ed/0x250 do_syscall_64+0xbf/0x1d0 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7c08737e8e Code: c0 e9 b6 fe ff ff 50 48 8d 3d 6e 18 0a 00 e8 b9 e7 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28 RSP: 002b:00007ffc6d311df8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffc6d315e8f RCX: 00007f7c08737e8e RDX: 0000000000004000 RSI: 00007ffc6d311e00 RDI: 0000000000000004 RBP: 0000000000000004 R08: 00226f1ee0cbd0c0 R09: 00007f7c08dcc080 R10: 00007f7c08dcc0f0 R11: 0000000000000246 R12: 0000562b0598bec0 R13: 00007ffc6d311e00 R14: 0000000000000004 R15: 0000562b047c7a80 ---------------- Code disassembly (best guess): 0: 42 ff rex.X (bad) 2: 39 c6 cmp %eax,%esi 4: 0f 83 bb 16 00 00 jae 0x16c5 a: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 11: fc ff df 14: 89 f2 mov %esi,%edx 16: 48 8d 3c 95 ec e7 c1 lea -0x793e1814(,%rdx,4),%rdi 1d: 86 1e: 49 89 f8 mov %rdi,%r8 21: 49 c1 e8 03 shr $0x3,%r8 25: 45 0f b6 04 00 movzbl (%r8,%rax,1),%r8d * 2a: 48 89 f8 mov %rdi,%rax <-- trapping instruction 2d: 83 e0 07 and $0x7,%eax 30: 83 c0 03 add $0x3,%eax 33: 44 38 c0 cmp %r8b,%al 36: 7c 32 jl 0x6a 38: 45 84 c0 test %r8b,%r8b 3b: 74 2d je 0x6a 3d: 48 rex.W 3e: 89 .byte 0x89 3f: 54 push %rsp