================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:183 [inline] BUG: KASAN: use-after-free in deliver_ptype_list_skb net/core/dev.c:1888 [inline] BUG: KASAN: use-after-free in __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462 Read of size 8 at addr ffff8882103ff8e8 by task syz-executor.0/24760 CPU: 1 PID: 24760 Comm: syz-executor.0 Not tainted 4.14.193-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load8_noabort+0x68/0x70 mm/kasan/report.c:430 __read_once_size include/linux/compiler.h:183 [inline] deliver_ptype_list_skb net/core/dev.c:1888 [inline] __netif_receive_skb_core+0x23e1/0x2a30 net/core/dev.c:4462 __netif_receive_skb+0x27/0x1a0 net/core/dev.c:4512 process_backlog+0x210/0x6f0 net/core/dev.c:5194 napi_poll net/core/dev.c:5595 [inline] net_rx_action+0x466/0xfd0 net/core/dev.c:5661 __do_softirq+0x254/0xa1d kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3611 RSP: 0018:ffff8881f9db7240 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0fa2d23 RBX: dffffc0000000000 RCX: 1ffff11041a4ad6d RDX: 0000000000000000 RSI: ffff88820d256b70 RDI: ffff88820d256b44 RBP: ffffed1041a4ac58 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88820d2562c0 R13: ffffffff87d16918 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:__rcu_read_unlock+0xfc/0x160 kernel/rcu/update.c:262 RSP: 0018:ffff8881f9db7310 EFLAGS: 00000a02 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: ffff88820d2562c0 RCX: ffffc90005b10000 RDX: 1ffff11041a4acc8 RSI: ffffffff8164a776 RDI: ffff88820d256644 RBP: ffff88820d256640 R08: 0000000000000000 R09: 0000000000020012 R10: ffff88820d256b70 R11: ffff88820d2562c0 R12: 0000000000000000 R13: 0000000000000000 R14: ffff88812fe52ac0 R15: 0000000000000280 rcu_read_unlock include/linux/rcupdate.h:684 [inline] is_bpf_text_address+0x9b/0x150 kernel/bpf/core.c:458 kernel_text_address kernel/extable.c:150 [inline] kernel_text_address+0xbd/0xf0 kernel/extable.c:120 __kernel_text_address+0x9/0x30 kernel/extable.c:105 unwind_get_return_address arch/x86/kernel/unwind_orc.c:252 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:247 __save_stack_trace+0xa0/0x160 arch/x86/kernel/stacktrace.c:45 save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc_node_trace+0x153/0x400 mm/slab.c:3661 __do_kmalloc_node mm/slab.c:3681 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3696 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0x96/0x510 net/core/skbuff.c:205 alloc_skb_fclone include/linux/skbuff.h:1022 [inline] sk_stream_alloc_skb+0xb1/0x760 net/ipv4/tcp.c:855 tso_fragment net/ipv4/tcp_output.c:1859 [inline] tcp_write_xmit+0x1d3f/0x4e10 net/ipv4/tcp_output.c:2377 __tcp_push_pending_frames+0xa0/0x230 net/ipv4/tcp_output.c:2577 tcp_push_pending_frames include/net/tcp.h:1778 [inline] tcp_data_snd_check net/ipv4/tcp_input.c:5132 [inline] tcp_rcv_established+0x71a/0x17a0 net/ipv4/tcp_input.c:5579 tcp_v4_do_rcv+0x541/0x7d0 net/ipv4/tcp_ipv4.c:1476 sk_backlog_rcv include/net/sock.h:917 [inline] __release_sock+0x12a/0x350 net/core/sock.c:2269 release_sock+0x54/0x1b0 net/core/sock.c:2784 sk_stream_wait_memory+0x492/0xd20 net/core/stream.c:145 tcp_sendmsg_locked+0x1179/0x2ef0 net/ipv4/tcp.c:1416 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1457 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 SYSC_sendto net/socket.c:1763 [inline] SyS_sendto+0x1c7/0x2c0 net/socket.c:1731 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45ce69 RSP: 002b:00007f751b275c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 000000000002c380 RCX: 000000000045ce69 RDX: 000000000000fe6a RSI: 00000000200012c0 RDI: 0000000000000004 RBP: 000000000118bf78 R08: 0000000000000000 R09: 0000000000000027 R10: 000000000020c49a R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffdee0381bf R14: 00007f751b2769c0 R15: 000000000118bf2c Allocated by task 24774: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 __do_kmalloc mm/slab.c:3720 [inline] __kmalloc+0x15a/0x400 mm/slab.c:3729 kmalloc include/linux/slab.h:493 [inline] sk_prot_alloc+0x1ba/0x290 net/core/sock.c:1467 sk_alloc+0x36/0xcd0 net/core/sock.c:1521 packet_create+0xf5/0x7f0 net/packet/af_packet.c:3283 __sock_create+0x303/0x620 net/socket.c:1275 sock_create net/socket.c:1315 [inline] SYSC_socket net/socket.c:1345 [inline] SyS_socket+0xd1/0x1b0 net/socket.c:1325 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 24772: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xc9/0x250 mm/slab.c:3815 sk_prot_free net/core/sock.c:1504 [inline] __sk_destruct+0x577/0x6e0 net/core/sock.c:1582 sk_destruct net/core/sock.c:1597 [inline] __sk_free+0xd9/0x2d0 net/core/sock.c:1605 sk_free+0x2b/0x40 net/core/sock.c:1616 sock_put include/net/sock.h:1658 [inline] packet_release+0x837/0xa80 net/packet/af_packet.c:3112 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8882103ff100 which belongs to the cache kmalloc-2048 of size 2048 The buggy address is located 2024 bytes inside of 2048-byte region [ffff8882103ff100, ffff8882103ff900) The buggy address belongs to the page: page:ffffea000840ff80 count:1 mapcount:0 mapping:ffff8882103fe000 index:0x0 compound_mapcount: 0 flags: 0x57ffe0000008100(slab|head) raw: 057ffe0000008100 ffff8882103fe000 0000000000000000 0000000100000003 raw: ffffea00082431a0 ffffea0007fa3da0 ffff88812fe52c40 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8882103ff780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8882103ff800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8882103ff880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8882103ff900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8882103ff980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================