================================================================== BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1871 [inline] BUG: KASAN: use-after-free in __netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4406 Read of size 2 at addr ffff8801ce2bf740 by task syzkaller174120/3080 CPU: 0 PID: 3080 Comm: syzkaller174120 Not tainted 4.13.0-mm1+ #7 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x24e/0x340 mm/kasan/report.c:409 __asan_report_load2_noabort+0x14/0x20 mm/kasan/report.c:428 deliver_ptype_list_skb net/core/dev.c:1871 [inline] __netif_receive_skb_core+0x2be3/0x33d0 net/core/dev.c:4406 __netif_receive_skb+0x2c/0x1b0 net/core/dev.c:4461 netif_receive_skb_internal+0x10b/0x670 net/core/dev.c:4534 napi_skb_finish net/core/dev.c:4895 [inline] napi_gro_receive+0x3d0/0x500 net/core/dev.c:4926 receive_buf+0xcc5/0x51f0 drivers/net/virtio_net.c:841 virtnet_receive drivers/net/virtio_net.c:1087 [inline] virtnet_poll+0x304/0xad0 drivers/net/virtio_net.c:1168 napi_poll net/core/dev.c:5537 [inline] net_rx_action+0x792/0x1910 net/core/dev.c:5603 __do_softirq+0x2bb/0xbd0 kernel/softirq.c:284 invoke_softirq kernel/softirq.c:364 [inline] irq_exit+0x1d3/0x210 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:638 [inline] do_IRQ+0xf6/0x190 arch/x86/kernel/irq.c:253 common_interrupt+0x9d/0x9d arch/x86/entry/entry_64.S:598 </IRQ> RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x5e/0xba kernel/locking/spinlock.c:191 RSP: 0018:ffff8801ce1ff790 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff6e RAX: dffffc0000000000 RBX: 0000000000000282 RCX: 0000000000000006 RDX: 1ffffffff0b592fd RSI: 1ffff10039c5518f RDI: 0000000000000282 RBP: ffff8801ce1ff7a0 R08: ffff8801ce1ff0f8 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87069bc0 R13: ffff8801ce1ff7e8 R14: ffff8801ce328300 R15: 0000000000000000 kretprobe_table_unlock kernel/kprobes.c:1179 [inline] kprobe_flush_task+0x1a3/0x5d0 kernel/kprobes.c:1208 finish_task_switch+0x4c1/0x740 kernel/sched/core.c:2671 context_switch kernel/sched/core.c:2793 [inline] __schedule+0x8f0/0x2070 kernel/sched/core.c:3366 preempt_schedule_common+0x35/0x60 kernel/sched/core.c:3505 _cond_resched+0x17/0x20 kernel/sched/core.c:4842 down_write+0x6c/0x120 kernel/locking/rwsem.c:52 lock_anon_vma_root mm/rmap.c:237 [inline] anon_vma_clone+0x1a4/0x700 mm/rmap.c:277 __split_vma+0x3a3/0x8c0 mm/mmap.c:2567 split_vma+0x8f/0xc0 mm/mmap.c:2610 mprotect_fixup+0x3f5/0x640 mm/mprotect.c:351 do_mprotect_pkey+0x57d/0x900 mm/mprotect.c:489 SYSC_mprotect mm/mprotect.c:514 [inline] SyS_mprotect+0x2a/0x40 mm/mprotect.c:511 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x445d47 RSP: 002b:00007ffd03d470b8 EFLAGS: 00000246 ORIG_RAX: 000000000000000a RAX: ffffffffffffffda RBX: 0000000000800000 RCX: 0000000000445d47 RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007f565d953000 RBP: 0000000000000082 R08: 00000000006dba00 R09: 00000000006dba00 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006da898 R13: 00000000006da898 R14: 0000000000000000 R15: 0000000000002710 Allocated by task 3060: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 kmem_cache_alloc_trace+0x136/0x750 mm/slab.c:3627 kmalloc include/linux/slab.h:493 [inline] kzalloc include/linux/slab.h:666 [inline] fanout_add+0xa50/0x1190 net/packet/af_packet.c:1733 packet_setsockopt+0xfdc/0x1e80 net/packet/af_packet.c:3795 SYSC_setsockopt net/socket.c:1852 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1831 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 3003: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3503 [inline] kfree+0xca/0x250 mm/slab.c:3820 packet_release+0xa8f/0xd70 net/packet/af_packet.c:3033 sock_release+0x8d/0x1e0 net/socket.c:597 sock_close+0x16/0x20 net/socket.c:1126 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:244 task_work_run+0x199/0x270 kernel/task_work.c:112 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xa52/0x1b40 kernel/exit.c:865 do_group_exit+0x149/0x400 kernel/exit.c:968 SYSC_exit_group kernel/exit.c:979 [inline] SyS_exit_group+0x1d/0x20 kernel/exit.c:977 entry_SYSCALL_64_fastpath+0x1f/0xbe The buggy address belongs to the object at ffff8801ce2beec0 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 2176 bytes inside of