9pnet: p9_fd_create_tcp (4109): problem connecting socket to 127.0.0.1 9pnet: p9_fd_create_tcp (4112): problem connecting socket to 127.0.0.1 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.1:4104] Modules linked in: irq event stamp: 5355681 hardirqs last enabled at (5355680): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (5355681): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (5321022): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (5321025): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4104 Comm: syz-executor.1 Not tainted 5.10.238 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:50 [inline] RIP: 0010:stack_access_ok+0x33/0x130 arch/x86/kernel/unwind_orc.c:347 Code: df 41 54 48 89 f9 49 89 fc 55 48 c1 e9 03 48 89 f5 53 48 83 ec 08 0f b6 04 01 84 c0 74 08 3c 03 0f 8e ae 00 00 00 41 8b 04 24 <85> c0 74 63 48 b8 00 00 00 00 00 fc ff df 49 8d 7c 24 08 48 89 f9 RSP: 0018:ffff88806ce09638 EFLAGS: 00000246 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffff1100d9c12e7 RDX: 00000000000000a8 RSI: ffff88800dbbf308 RDI: ffff88806ce09738 RBP: ffff88800dbbf308 R08: ffffffff85d476f7 R09: ffff88800dbbf308 R10: 0000000000032042 R11: 1ffff1100d9c12d4 R12: ffff88806ce09738 R13: ffff88806ce09738 R14: 1ffff1100d9c12d4 R15: ffff88800dbbf308 FS: 00007f47a4cc4700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4cb3fb240 CR3: 0000000036800000 CR4: 0000000000350ef0 Call Trace: deref_stack_regs arch/x86/kernel/unwind_orc.c:372 [inline] unwind_next_frame+0xb89/0x1a90 arch/x86/kernel/unwind_orc.c:549 arch_stack_walk+0x83/0xf0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x8c/0xc0 kernel/stacktrace.c:121 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:48 kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc.constprop.0+0xc9/0xd0 mm/kasan/common.c:461 slab_post_alloc_hook mm/slab.h:532 [inline] slab_alloc_node mm/slub.c:2896 [inline] __kmalloc_node_track_caller+0x189/0x3b0 mm/slub.c:4496 __kmalloc_reserve net/core/skbuff.c:144 [inline] __alloc_skb+0xb1/0x5b0 net/core/skbuff.c:212 __netdev_alloc_skb+0x6e/0x360 net/core/skbuff.c:448 netdev_alloc_skb include/linux/skbuff.h:2855 [inline] dev_alloc_skb include/linux/skbuff.h:2868 [inline] __ieee80211_beacon_get+0x3af/0x1440 net/mac80211/tx.c:4876 ieee80211_beacon_get_tim+0x88/0x9f0 net/mac80211/tx.c:4990 ieee80211_beacon_get include/net/mac80211.h:4912 [inline] mac80211_hwsim_beacon_tx+0x111/0x940 drivers/net/wireless/mac80211_hwsim.c:1740 __iterate_interfaces+0x1f0/0x550 net/mac80211/util.c:792 ieee80211_iterate_active_interfaces_atomic+0x71/0x1c0 net/mac80211/util.c:828 mac80211_hwsim_beacon+0xd1/0x1d0 drivers/net/wireless/mac80211_hwsim.c:1793 __run_hrtimer kernel/time/hrtimer.c:1588 [inline] __hrtimer_run_queues+0x632/0xb40 kernel/time/hrtimer.c:1652 hrtimer_run_softirq+0x148/0x310 kernel/time/hrtimer.c:1669 __do_softirq+0x1b8/0x7c9 kernel/softirq.c:298 asm_call_irq_on_stack+0x12/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:393 [inline] __irq_exit_rcu kernel/softirq.c:423 [inline] irq_exit_rcu+0x114/0x1b0 kernel/softirq.c:435 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 RIP: 0010:strlen+0x30/0xa0 lib/string.c:568 Code: 00 fc ff df 55 48 89 fa 48 89 fd 53 48 c1 ea 03 48 83 ec 08 0f b6 04 02 48 89 fa 83 e2 07 38 d0 7f 04 84 c0 75 50 80 7d 00 00 <74> 3d 48 bb 00 00 00 00 00 fc ff df 48 89 e8 48 83 c0 01 48 89 c2 RSP: 0018:ffff88800dbbf3b8 EFLAGS: 00000202 RAX: 0000000000000004 RBX: ffff8880089aca58 RCX: ffffc900015ee000 RDX: 0000000000000000 RSI: ffffffff818ff050 RDI: ffff8880089acaf8 RBP: ffff8880089acaf8 R08: 0000000000000001 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880089aca78 R13: ffff8880089acaf8 R14: 0000000000000003 R15: ffff8880089aca00 strlen include/linux/string.h:314 [inline] find_entry.isra.0+0xf1/0x1e0 fs/proc/proc_sysctl.c:130 find_subdir fs/proc/proc_sysctl.c:938 [inline] xlate_dir+0x135/0x240 fs/proc/proc_sysctl.c:1044 xlate_dir+0x98/0x240 fs/proc/proc_sysctl.c:1040 xlate_dir+0x98/0x240 fs/proc/proc_sysctl.c:1040 insert_links fs/proc/proc_sysctl.c:1231 [inline] insert_header+0x152/0xfc0 fs/proc/proc_sysctl.c:236 get_subdir fs/proc/proc_sysctl.c:1013 [inline] __register_sysctl_table+0xd9e/0x1090 fs/proc/proc_sysctl.c:1348 __devinet_sysctl_register+0x15e/0x280 net/ipv4/devinet.c:2599 devinet_init_net+0x1ac/0x650 net/ipv4/devinet.c:2726 ops_init+0xbb/0x6b0 net/core/net_namespace.c:156 setup_net+0x2f4/0x900 net/core/net_namespace.c:348 copy_net_ns+0x2c0/0x5d0 net/core/net_namespace.c:518 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x3fb/0x4f0 kernel/nsproxy.c:179 copy_process+0x393a/0x78b0 kernel/fork.c:2214 kernel_clone+0xe7/0x980 kernel/fork.c:2582 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2857 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f47a774eb19 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:00007f47a4cc4188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f47a7861f60 RCX: 00007f47a774eb19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000740 RBP: 00007f47a77a8f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1bc2330f R14: 00007f47a4cc4300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline] NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline] NMI backtrace for cpu 1 skipped: idling at default_idle+0xe/0x20 arch/x86/kernel/process.c:711 ---------------- Code disassembly (best guess): 0: df 41 54 filds 0x54(%rcx) 3: 48 89 f9 mov %rdi,%rcx 6: 49 89 fc mov %rdi,%r12 9: 55 push %rbp a: 48 c1 e9 03 shr $0x3,%rcx e: 48 89 f5 mov %rsi,%rbp 11: 53 push %rbx 12: 48 83 ec 08 sub $0x8,%rsp 16: 0f b6 04 01 movzbl (%rcx,%rax,1),%eax 1a: 84 c0 test %al,%al 1c: 74 08 je 0x26 1e: 3c 03 cmp $0x3,%al 20: 0f 8e ae 00 00 00 jle 0xd4 26: 41 8b 04 24 mov (%r12),%eax * 2a: 85 c0 test %eax,%eax <-- trapping instruction 2c: 74 63 je 0x91 2e: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 35: fc ff df 38: 49 8d 7c 24 08 lea 0x8(%r12),%rdi 3d: 48 89 f9 mov %rdi,%rcx