watchdog: BUG: soft lockup - CPU#1 stuck for 21s! [syz-executor.5:24862] Modules linked in: irq event stamp: 5812621 hardirqs last enabled at (5812620): [] asm_sysvec_apic_timer_interrupt+0x1a/0x20 hardirqs last disabled at (5812621): [] sysvec_apic_timer_interrupt+0xf/0x90 softirqs last enabled at (5805092): [] irq_exit_rcu+0x93/0xc0 softirqs last disabled at (5805095): [] irq_exit_rcu+0x93/0xc0 CPU: 1 PID: 24862 Comm: syz-executor.5 Not tainted 6.4.0-rc2-next-20230519 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 Code: be a8 01 00 00 e8 a0 ff ff ff 31 c0 e9 d9 80 03 03 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 8b 05 7d 99 b7 7e 89 c1 48 8b 34 24 81 e1 00 01 00 RSP: 0018:ffff88806cf08ec0 EFLAGS: 00000202 RAX: ffffffff8427578d RBX: 0000000000000001 RCX: ffffffff842757cf RDX: ffff888046cab680 RSI: 0000000000000100 RDI: 0000000000000005 RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88801a5885d0 R13: ffff888038af0de0 R14: ffff88801a588500 R15: ffff88806cf09068 FS: 00007f629ef48700(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e329000 CR3: 0000000041bee000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: invoke_tx_handlers_late+0x20c8/0x29d0 ieee80211_tx_dequeue+0x1234/0x1b40 ieee80211_handle_wake_tx_queue+0x19d/0x260 ieee80211_queue_skb+0xaf6/0x1f20 ieee80211_tx+0x2cc/0x400 ieee80211_xmit+0x1f5/0x270 __ieee80211_subif_start_xmit+0x9da/0x1240 ieee80211_subif_start_xmit+0xf0/0x1380 dev_hard_start_xmit+0x173/0x6b0 __dev_queue_xmit+0x22c7/0x36c0 ip6_finish_output2+0x142d/0x1b80 __ip6_finish_output+0x68c/0xff0 ip6_output+0x1e0/0x530 ndisc_send_skb+0xa7b/0x1c10 ndisc_send_rs+0x135/0x550 addrconf_rs_timer+0x2f0/0x810 call_timer_fn+0x17d/0x4e0 expire_timers+0x272/0x460 run_timer_softirq+0x2f5/0x880 __do_softirq+0x1b7/0x7d4 irq_exit_rcu+0x93/0xc0 sysvec_apic_timer_interrupt+0x6e/0x90 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0010:__slab_free+0x36/0x380 Code: 49 89 fd 41 54 55 48 89 f5 53 48 83 ec 60 0f 1f 44 00 00 66 44 89 44 24 14 4c 89 f0 4d 89 fe 49 89 c7 48 8b 4d 28 4c 8b 65 20 <41> 8b 45 28 89 cb 66 2b 5c 24 14 48 89 4c 24 48 4d 89 24 07 89 c8 RSP: 0018:ffff888047f17658 EFLAGS: 00000282 RAX: ffff88800c935680 RBX: ffff8880385ee800 RCX: 0000000000800051 RDX: ffff88800c935680 RSI: ffffea0000324d40 RDI: ffff8880087ad3c0 RBP: ffffea0000324d40 R08: 0000000000000001 R09: ffffffff818112bf R10: ffffea0000324d40 R11: 0000000000000000 R12: ffff88800c9351c0 R13: ffff8880087ad3c0 R14: ffff88800c935680 R15: ffff88800c935680 qlist_free_all+0x6d/0x1a0 kasan_quarantine_reduce+0x199/0x230 __kasan_kmalloc+0x6f/0x90 __kmalloc+0x5a/0x160 __register_sysctl_table+0xc37/0x14f0 ipv6_sysctl_net_init+0x168/0x2a0 ops_init+0xbb/0x6b0 setup_net+0x3d9/0x990 copy_net_ns+0x321/0x770 create_new_namespaces+0x3f6/0xb30 copy_namespaces+0x414/0x500 copy_process+0x2b78/0x73b0 kernel_clone+0xeb/0x7d0 __do_sys_clone3+0x1d5/0x250 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f62a19d2b19 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:00007f629ef48188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f62a1ae5f60 RCX: 00007f62a19d2b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020004c00 RBP: 00007f62a1a2cf6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd9581a0bf R14: 00007f629ef48300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at default_idle+0xf/0x20 ---------------- Code disassembly (best guess): 0: be a8 01 00 00 mov $0x1a8,%esi 5: e8 a0 ff ff ff callq 0xffffffaa a: 31 c0 xor %eax,%eax c: e9 d9 80 03 03 jmpq 0x30380ea 11: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 18: 00 00 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop 29: 90 nop * 2a: f3 0f 1e fa endbr64 <-- trapping instruction 2e: 65 8b 05 7d 99 b7 7e mov %gs:0x7eb7997d(%rip),%eax # 0x7eb799b2 35: 89 c1 mov %eax,%ecx 37: 48 8b 34 24 mov (%rsp),%rsi 3b: 81 .byte 0x81 3c: e1 00 loope 0x3e 3e: 01 00 add %eax,(%rax)