====================================== | [ 81.671951][ C1] page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) | [ 81.672238][ C1] ------------[ cut here ]------------ | [ 81.672434][ C1] kernel BUG at include/linux/mm.h:1140! | [ 81.672650][ C1] Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 81.673122][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 81.673460][ C1] RIP: 0010:__free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.673620][ C1] Code: 0f 94 c3 e9 ba fe ff ff 48 c7 c6 a0 18 98 bb 4c 89 e7 e8 df bf f4 ff 90 0f 0b 48 c7 c6 40 29 98 bb 4c 89 e7 e8 cd bf f4 ff 90 <0f> 0b 48 89 ef e8 72 03 09 00 e9 c5 fe ff ff e8 98 03 09 00 e9 35 All code ======== 0: 0f 94 c3 sete %bl 3: e9 ba fe ff ff jmp 0xfffffffffffffec2 8: 48 c7 c6 a0 18 98 bb mov $0xffffffffbb9818a0,%rsi f: 4c 89 e7 mov %r12,%rdi 12: e8 df bf f4 ff call 0xfffffffffff4bff6 17: 90 nop 18: 0f 0b ud2 1a: 48 c7 c6 40 29 98 bb mov $0xffffffffbb982940,%rsi 21: 4c 89 e7 mov %r12,%rdi 24: e8 cd bf f4 ff call 0xfffffffffff4bff6 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 89 ef mov %rbp,%rdi 2f: e8 72 03 09 00 call 0x903a6 34: e9 c5 fe ff ff jmp 0xfffffffffffffefe 39: e8 98 03 09 00 call 0x903d6 3e: e9 .byte 0xe9 3f: 35 .byte 0x35 Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 89 ef mov %rbp,%rdi 5: e8 72 03 09 00 call 0x9037c a: e9 c5 fe ff ff jmp 0xfffffffffffffed4 f: e8 98 03 09 00 call 0x903ac 14: e9 .byte 0xe9 15: 35 .byte 0x35 [ 81.674206][ C1] RSP: 0018:ffffc900001e8df8 EFLAGS: 00010246 [ 81.674407][ C1] RAX: 000000000000003e RBX: 0000000000000000 RCX: 1ffffffff78bb43c [ 81.674670][ C1] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 [ 81.674907][ C1] RBP: ffffea000017b334 R08: 0000000000000000 R09: fffffbfff78bb43c [ 81.675141][ C1] R10: 0000000000000003 R11: 205d314320202020 R12: ffffea000017b300 [ 81.675386][ C1] R13: ffffc900001e8ec0 R14: 0000000000000000 R15: 0000000000000007 [ 81.675621][ C1] FS: 00007f51e7d9c740(0000) GS:ffff88802f680000(0000) knlGS:0000000000000000 [ 81.675923][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 81.676156][ C1] CR2: 00007f51e7dd6230 CR3: 00000000082d2004 CR4: 0000000000772ef0 [ 81.676392][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 81.676642][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 81.676910][ C1] PKRU: 55555554 [ 81.677034][ C1] Call Trace: [ 81.677162][ C1] [ 81.677244][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 81.677375][ C1] ? do_trap (arch/x86/kernel/traps.c:156 arch/x86/kernel/traps.c:197) [ 81.677494][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.677653][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:218) [ 81.677815][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.677973][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.678132][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:256) [ 81.678288][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.678444][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:315) [ 81.678602][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:621) [ 81.678771][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.678930][ C1] ? __free_pages (./include/linux/mm.h:1140 ./include/linux/mm.h:1138 mm/page_alloc.c:4819) [ 81.679086][ C1] ? rcu_do_batch (kernel/rcu/tree.c:2567) [ 81.679245][ C1] neigh_hash_free_rcu (net/core/neighbour.c:555) [ 81.679411][ C1] rcu_do_batch (kernel/rcu/tree.c:2567) [ 81.679569][ C1] ? __pfx_rcu_do_batch (kernel/rcu/tree.c:2491) [ 81.679725][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4339 kernel/locking/lockdep.c:4406) [ 81.679938][ C1] rcu_core (kernel/rcu/tree.c:2825) [ 81.680050][ C1] handle_softirqs (kernel/softirq.c:554) [ 81.680202][ C1] irq_exit_rcu (kernel/softirq.c:589 kernel/softirq.c:428 kernel/softirq.c:637 kernel/softirq.c:649) [ 81.680310][ C1] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1037 arch/x86/kernel/apic/apic.c:1037) [ 81.680459][ C1] [ 81.680533][ C1] [ 81.680611][ C1] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:702) [ 81.680801][ C1] RIP: 0010:_raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:152 kernel/locking/spinlock.c:194) [ 81.680999][ C1] Code: 10 e8 c1 9d 87 fd 48 89 ef e8 d9 0e 88 fd 81 e3 00 02 00 00 75 1d 9c 58 f6 c4 02 75 29 48 85 db 74 01 fb 65 ff 0d 55 0b bb 44 <74> 0e 5b 5d c3 cc cc cc cc e8 8f e0 ac fd eb dc 0f 1f 44 00 00 5b All code ======== 0: 10 e8 adc %ch,%al 2: c1 9d 87 fd 48 89 ef rcrl $0xef,-0x76b70279(%rbp) 9: e8 d9 0e 88 fd call 0xfffffffffd880ee7 e: 81 e3 00 02 00 00 and $0x200,%ebx 14: 75 1d jne 0x33 16: 9c pushf 17: 58 pop %rax 18: f6 c4 02 test $0x2,%ah 1b: 75 29 jne 0x46 1d: 48 85 db test %rbx,%rbx 20: 74 01 je 0x23 22: fb sti 23: 65 ff 0d 55 0b bb 44 decl %gs:0x44bb0b55(%rip) # 0x44bb0b7f 2a:* 74 0e je 0x3a <-- trapping instruction 2c: 5b pop %rbx 2d: 5d pop %rbp 2e: c3 ret 2f: cc int3 30: cc int3 31: cc int3 32: cc int3 33: e8 8f e0 ac fd call 0xfffffffffdace0c7 38: eb dc jmp 0x16 3a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 3f: 5b pop %rbx Code starting with the faulting instruction =========================================== 0: 74 0e je 0x10 2: 5b pop %rbx 3: 5d pop %rbp 4: c3 ret 5: cc int3 6: cc int3 7: cc int3 8: cc int3 9: e8 8f e0 ac fd call 0xfffffffffdace09d e: eb dc jmp 0xffffffffffffffec 10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 15: 5b pop %rbx [ 81.681520][ C1] RSP: 0018:ffffc90000a9f658 EFLAGS: 00000246 [ 81.681704][ C1] RAX: 0000000000000006 RBX: 0000000000000200 RCX: 1ffffffff7cfbaf2 [ 81.681927][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffbb48bd81 [ 81.682162][ C1] RBP: ffff88800104f440 R08: 0000000000000001 R09: fffffbfff7cf99c9 [ 81.682400][ C1] R10: ffffffffbe7cce4f R11: ffffc90000a9f489 R12: ffff8880020edc10 [ 81.682645][ C1] R13: 0000000000000000 R14: ffffc90000a9f6a8 R15: ffff8880028eeb00 [ 81.682908][ C1] ? _raw_spin_unlock_irqrestore (./include/linux/spinlock_api_smp.h:151 kernel/locking/spinlock.c:194) [ 81.683111][ C1] qlist_free_all (mm/kasan/quarantine.c:174) [ 81.683285][ C1] kasan_quarantine_reduce (./include/linux/srcu.h:320 mm/kasan/quarantine.c:287) [ 81.683449][ C1] __kasan_slab_alloc (mm/kasan/common.c:329) [ 81.683613][ C1] kmem_cache_alloc_node_noprof (mm/slub.c:4086 mm/slub.c:4134 mm/slub.c:4186) [ 81.683813][ C1] __alloc_skb (net/core/skbuff.c:668) [ 81.683984][ C1] ? __pfx___alloc_skb (net/core/skbuff.c:651) [ 81.684158][ C1] ? fib4_rule_action.part.0 (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/ipv4/fib_rules.c:141) [ 81.684309][ C1] ? fib_rules_lookup (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/core/fib_rules.c:342) [ 81.684499][ C1] alloc_skb_with_frags (./include/linux/skbuff.h:1325 net/core/skbuff.c:6622) [ 81.684656][ C1] ? __pfx_fib_rules_lookup (net/core/fib_rules.c:295) [ 81.684825][ C1] ? l3mdev_update_flow (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/l3mdev/l3mdev.c:299) [ 81.684990][ C1] sock_alloc_send_pskb (net/core/sock.c:2874) [ 81.685135][ C1] ? find_held_lock (kernel/locking/lockdep.c:5315) [ 81.685287][ C1] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2845) [ 81.685471][ C1] ? __mkroute_output (./arch/x86/include/asm/atomic.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2401 ./include/linux/atomic/atomic-instrumented.h:1476 ./include/linux/rcuref.h:67 ./include/net/dst.h:302 net/ipv4/route.c:2566) [ 81.685644][ C1] ? ip_route_output_key_hash (./include/linux/rcupdate.h:347 ./include/linux/rcupdate.h:880 net/ipv4/route.c:2623) [ 81.685807][ C1] raw_send_hdrinc (./include/net/sock.h:1797 net/ipv4/raw.c:353) [ 81.685972][ C1] ? __pfx_raw_send_hdrinc (net/ipv4/raw.c:330) [ 81.686146][ C1] raw_sendmsg (net/ipv4/raw.c:644) [ 81.686314][ C1] ? __pfx_raw_sendmsg (net/ipv4/raw.c:483) [ 81.686482][ C1] ? usage_skip (kernel/locking/lockdep.c:2314 kernel/locking/lockdep.c:2282) [ 81.686648][ C1] ? __lock_release (kernel/locking/lockdep.c:5501) [ 81.686807][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.686973][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5477) [ 81.687130][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 81.687293][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.687451][ C1] ? lock_acquire (kernel/locking/lockdep.c:5798) [ 81.687610][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.687774][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.687933][ C1] __sys_sendto (net/socket.c:729 net/socket.c:744 net/socket.c:2214) [ 81.688092][ C1] ? __pfx___sys_sendto (net/socket.c:2184) [ 81.688253][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.688428][ C1] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 52)) [ 81.688587][ C1] ? lock_acquire (kernel/locking/lockdep.c:5798) [ 81.688747][ C1] ? __might_fault (mm/memory.c:6700 mm/memory.c:6693) [ 81.688912][ C1] ? trace_rseq_update (./include/trace/events/rseq.h:11 (discriminator 52)) [ 81.689075][ C1] ? __rseq_handle_notify_resume (kernel/rseq.c:316) [ 81.689272][ C1] ? __pfx___rseq_handle_notify_resume (kernel/rseq.c:316) [ 81.689477][ C1] ? __pfx_task_work_run (kernel/task_work.c:196) [ 81.689637][ C1] __x64_sys_sendto (net/socket.c:2222) [ 81.689802][ C1] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4347 kernel/locking/lockdep.c:4406) [ 81.690022][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 81.690195][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 81.690396][ C1] RIP: 0033:0x7f51e7ff685a [ 81.690560][ C1] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 All code ======== 0: d8 64 89 02 fsubs 0x2(%rcx,%rcx,4) 4: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax b: eb b8 jmp 0xffffffffffffffc5 d: 0f 1f 00 nopl (%rax) 10: f3 0f 1e fa endbr64 14: 41 89 ca mov %ecx,%r10d 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 15 jne 0x38 23: b8 2c 00 00 00 mov $0x2c,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 7e ja 0xb0 32: c3 ret 33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 38: 41 54 push %r12 3a: 48 83 ec 30 sub $0x30,%rsp 3e: 44 rex.R 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 7e ja 0x86 8: c3 ret 9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) e: 41 54 push %r12 10: 48 83 ec 30 sub $0x30,%rsp 14: 44 rex.R 15: 89 .byte 0x89 [ 81.691135][ C1] RSP: 002b:00007fff4a54f0d8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 81.691363][ C1] RAX: ffffffffffffffda RBX: 000000003a4d69d0 RCX: 00007f51e7ff685a [ 81.691582][ C1] RDX: 000000000000005c RSI: 000000003a4d65c0 RDI: 0000000000000005 [ 81.691798][ C1] RBP: 000000003a4d69d0 R08: 00007fff4a54f0e0 R09: 0000000000000010 [ 81.692013][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000005c Finger prints: __free_pages:neigh_hash_free_rcu:rcu_do_batch:rcu_core:handle_softirqs