watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.7:4708] Modules linked in: irq event stamp: 4790979 hardirqs last enabled at (4790978): [] asm_sysvec_apic_timer_interrupt+0x1b/0x20 hardirqs last disabled at (4790979): [] sysvec_apic_timer_interrupt+0xb/0xc0 softirqs last enabled at (4767292): [] __irq_exit_rcu+0x113/0x170 softirqs last disabled at (4767295): [] __irq_exit_rcu+0x113/0x170 CPU: 0 PID: 4708 Comm: syz-executor.7 Not tainted 5.19.0-rc6-next-20220712 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:tracing_gen_ctx_irq_test+0xdb/0x1b0 Code: 08 00 00 00 65 48 8b 2c 25 c0 6e 02 00 48 89 ef e8 da 6b 2d 00 48 89 ea 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 b5 00 00 00 48 8b 6d 00 31 ff 48 c1 ed 03 83 e5 01 89 ee e8 RSP: 0018:ffff88806ce08ab8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 0000000000000010 RCX: ffffffff81495356 RDX: 1ffff11003afe000 RSI: 0000000000000008 RDI: ffff88801d7f0000 RBP: ffff88801d7f0000 R08: 0000000000000000 R09: ffff88801d7f0007 R10: ffffed1003afe000 R11: 0000000000000001 R12: 0000000000000103 R13: ffff88806ce33928 R14: 0000000000000001 R15: 000000000000002c FS: 00007f43a4a4b700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8a4ab3ae0 CR3: 000000000e72e000 CR4: 0000000000350ef0 Call Trace: perf_trace_buf_update+0x33/0x190 perf_tp_event+0x15b/0xbc0 perf_trace_run_bpf_submit+0xf5/0x1d0 perf_trace_lock+0x308/0x560 lock_release+0x4aa/0x750 __is_insn_slot_addr+0x144/0x250 kernel_text_address+0x40/0xb0 __kernel_text_address+0x9/0x30 unwind_get_return_address+0x51/0x90 arch_stack_walk+0x99/0xf0 stack_trace_save+0x8c/0xc0 kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_set_free_info+0x20/0x30 __kasan_slab_free+0x108/0x190 kfree+0xf5/0x5d0 skb_release_data+0x686/0x7b0 __kfree_skb+0x46/0x60 tcp_rcv_established+0x1983/0x2110 tcp_v4_do_rcv+0x684/0x9b0 tcp_v4_rcv+0x3307/0x37c0 ip_protocol_deliver_rcu+0xbf/0x800 ip_local_deliver_finish+0x2dc/0x4b0 ip_local_deliver+0x1aa/0x200 ip_sublist_rcv_finish+0x274/0x570 ip_sublist_rcv+0x3fd/0x800 ip_list_rcv+0x29e/0x390 __netif_receive_skb_list_core+0x691/0x8d0 netif_receive_skb_list_internal+0x6cc/0xc90 napi_complete_done+0x1f1/0x790 e1000_clean+0x9b4/0x1c50 __napi_poll+0xb9/0x680 net_rx_action+0x9ac/0xd10 __do_softirq+0x1c8/0x8cc __irq_exit_rcu+0x113/0x170 irq_exit_rcu+0x5/0x20 sysvec_apic_timer_interrupt+0x8e/0xc0 asm_sysvec_apic_timer_interrupt+0x1b/0x20 RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 Code: 31 00 be 03 00 00 00 5d e9 86 17 c3 00 66 0f 1f 44 00 00 48 8b be a8 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 65 8b 05 a9 ed bd 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 c0 6e 02 00 a9 RSP: 0018:ffff88804605f710 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000004 RCX: 0000000000000004 RDX: ffff88803407baf8 RSI: 0000000000000004 RDI: ffffffff84b6af24 RBP: 0000000000000004 R08: 0000000000000001 R09: ffff88804605f71b R10: ffffed1008c0bee3 R11: 0000000000000001 R12: ffffffff84b6af24 R13: ffff88803407baf8 R14: 0000000000000004 R15: ffff88803407ba00 namecmp+0x16/0x60 find_entry.isra.0+0x103/0x1e0 __register_sysctl_table+0xcf6/0x1150 unix_sysctl_register+0x85/0x160 unix_net_init+0x50/0x300 ops_init+0xb2/0x480 setup_net+0x40c/0x9d0 copy_net_ns+0x318/0x760 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x391/0x480 copy_process+0x2c61/0x6d60 kernel_clone+0xe7/0xa60 __do_sys_clone3+0x1cd/0x2d0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f43a74d5b19 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:00007f43a4a4b188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f43a75e8f60 RCX: 00007f43a74d5b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f43a752ff6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8f2ebcaf R14: 00007f43a4a4b300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10 ---------------- Code disassembly (best guess): 0: 08 00 or %al,(%rax) 2: 00 00 add %al,(%rax) 4: 65 48 8b 2c 25 c0 6e mov %gs:0x26ec0,%rbp b: 02 00 d: 48 89 ef mov %rbp,%rdi 10: e8 da 6b 2d 00 callq 0x2d6bef 15: 48 89 ea mov %rbp,%rdx 18: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1f: fc ff df 22: 48 c1 ea 03 shr $0x3,%rdx 26: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) * 2a: 0f 85 b5 00 00 00 jne 0xe5 <-- trapping instruction 30: 48 8b 6d 00 mov 0x0(%rbp),%rbp 34: 31 ff xor %edi,%edi 36: 48 c1 ed 03 shr $0x3,%rbp 3a: 83 e5 01 and $0x1,%ebp 3d: 89 ee mov %ebp,%esi 3f: e8 .byte 0xe8