9pnet: Insufficient options for proto=fd audit: type=1400 audit(1738668244.202:10): avc: denied { write } for pid=4112 comm="syz-executor.4" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=perf_event permissive=1 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.3:4059] Modules linked in: irq event stamp: 4839131 hardirqs last enabled at (4839130): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (4839131): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1106 softirqs last enabled at (4825618): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (4825621): [] asm_call_irq_on_stack+0x12/0x20 CPU: 0 PID: 4059 Comm: syz-executor.3 Not tainted 5.10.233 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:__sanitizer_cov_trace_switch+0xe/0x80 kernel/kcov.c:303 Code: 48 89 f2 48 89 fe bf 07 00 00 00 e9 8c fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 41 54 48 89 fa 55 48 89 f5 53 48 8b 46 08 <48> 83 f8 20 74 5a 77 3d 48 83 f8 08 74 4b 48 83 f8 10 75 28 bf 03 RSP: 0018:ffff88806ce09a18 EFLAGS: 00000246 RAX: 0000000000000020 RBX: ffff88800dcc7e00 RCX: ffffffff81d2e1cc RDX: 0000000000000001 RSI: ffffffff848d9320 RDI: 0000000000000001 RBP: ffffffff848d9320 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001 R13: ffff88802030ddc0 R14: ffff88806ce09b00 R15: dffffc0000000000 FS: 00007f2c8d49f700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f173a8a4018 CR3: 000000004848e000 CR4: 0000000000350ef0 Call Trace: nf_hook_slow+0xdd/0x1e0 net/netfilter/core.c:585 nf_hook include/linux/netfilter.h:251 [inline] NF_HOOK include/linux/netfilter.h:294 [inline] ndisc_send_skb+0xb91/0x1860 net/ipv6/ndisc.c:511 ndisc_send_rs+0x131/0x560 net/ipv6/ndisc.c:705 addrconf_rs_timer+0x2ec/0x790 net/ipv6/addrconf.c:3935 call_timer_fn+0x182/0x4a0 kernel/time/timer.c:1444 expire_timers kernel/time/timer.c:1489 [inline] __run_timers.part.0+0x667/0x9a0 kernel/time/timer.c:1783 __run_timers kernel/time/timer.c:1761 [inline] run_timer_softirq+0x80/0x120 kernel/time/timer.c:1796 __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:___might_sleep+0x3f/0x2f0 kernel/sched/core.c:7266 Code: 8a 01 00 00 e8 b2 24 c8 02 85 c0 0f 85 2b 02 00 00 e8 a5 24 c8 02 85 c0 0f 85 c7 01 00 00 65 8b 05 76 30 e4 7e 25 ff ff ff 7f <39> c3 0f 84 cb 00 00 00 48 c7 c0 c4 43 67 85 48 ba 00 00 00 00 00 RSP: 0018:ffff888047d275c8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff84ff9960 RDI: ffff88801dc90948 RBP: ffffffff84bed32e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000201 R13: 0000000000000000 R14: 0000000000092cc0 R15: 0000000000092cc0 slab_pre_alloc_hook mm/slab.h:513 [inline] slab_alloc_node mm/slub.c:2821 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x297/0x310 mm/slub.c:2909 mem_pool_alloc mm/kmemleak.c:423 [inline] create_object.isra.0+0x3a/0xa20 mm/kmemleak.c:578 kmemleak_alloc_recursive include/linux/kmemleak.h:43 [inline] slab_post_alloc_hook mm/slab.h:534 [inline] slab_alloc_node mm/slub.c:2896 [inline] slab_alloc mm/slub.c:2904 [inline] kmem_cache_alloc+0x159/0x310 mm/slub.c:2909 kmem_cache_zalloc include/linux/slab.h:654 [inline] __proc_create+0x2b3/0x8b0 fs/proc/generic.c:431 proc_create_reg+0xb2/0x180 fs/proc/generic.c:558 proc_create_net_single+0x84/0x170 fs/proc/proc_net.c:203 ipv6_proc_init_net+0x54/0x1f0 net/ipv6/proc.c:277 ops_init+0xbb/0x6b0 net/core/net_namespace.c:156 setup_net+0x2d8/0x810 net/core/net_namespace.c:354 copy_net_ns+0x2c0/0x5d0 net/core/net_namespace.c:495 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x3fb/0x4f0 kernel/nsproxy.c:179 copy_process+0x385b/0x7800 kernel/fork.c:2129 kernel_clone+0xe7/0x980 kernel/fork.c:2506 __do_sys_clone3+0x1e5/0x320 kernel/fork.c:2781 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 RIP: 0033:0x7f2c8ff29b19 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:00007f2c8d49f188 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3 RAX: ffffffffffffffda RBX: 00007f2c9003cf60 RCX: 00007f2c8ff29b19 RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00000000200001c0 RBP: 00007f2c8ff83f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc0e1ebcef R14: 00007f2c8d49f300 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:706 ---------------- Code disassembly (best guess): 0: 48 89 f2 mov %rsi,%rdx 3: 48 89 fe mov %rdi,%rsi 6: bf 07 00 00 00 mov $0x7,%edi b: e9 8c fe ff ff jmpq 0xfffffe9c 10: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 17: 00 00 00 00 1b: 90 nop 1c: 41 54 push %r12 1e: 48 89 fa mov %rdi,%rdx 21: 55 push %rbp 22: 48 89 f5 mov %rsi,%rbp 25: 53 push %rbx 26: 48 8b 46 08 mov 0x8(%rsi),%rax * 2a: 48 83 f8 20 cmp $0x20,%rax <-- trapping instruction 2e: 74 5a je 0x8a 30: 77 3d ja 0x6f 32: 48 83 f8 08 cmp $0x8,%rax 36: 74 4b je 0x83 38: 48 83 f8 10 cmp $0x10,%rax 3c: 75 28 jne 0x66 3e: bf .byte 0xbf 3f: 03 .byte 0x3