flags: 0x1fffc0000000000() raw: 01fffc0000000000 ffffea0002a1a008 ffff88812fffc878 0000000000000000 raw: 0000000000000000 ffff88804e030880 0000000100000001 0000000000000000 page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ kernel BUG at include/linux/mm.h:547! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19580 Comm: syz-executor.1 Not tainted 5.1.0-rc1+ #31 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:put_page_testzero include/linux/mm.h:547 [inline] RIP: 0010:put_page include/linux/mm.h:993 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:2891 [inline] RIP: 0010:skb_release_data+0x5ac/0x7a0 net/core/skbuff.c:571 Code: 41 5d 41 5e 41 5f 5d c3 e8 c1 c0 fb fb 4c 8d 63 ff e9 b1 fc ff ff e8 b3 c0 fb fb 48 c7 c6 c0 88 fc 87 4c 89 e7 e8 34 1e 25 fc <0f> 0b e8 9d c0 fb fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff8880ae907508 EFLAGS: 00010206 RAX: ffff8880a7b72200 RBX: ffffea0001380c34 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff8199dda2 RDI: ffffea0001380c38 RBP: ffff8880ae907570 R08: 000000000000003e R09: ffff8880a7b72b40 R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0001380c00 R13: ffff88809995cbf0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f50b4533700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbdb8f8518 CR3: 000000009a701000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_release_all+0x4d/0x60 net/core/skbuff.c:631 __kfree_skb+0x16/0x30 net/core/skbuff.c:645 sk_wmem_free_skb include/net/sock.h:1463 [inline] tcp_rtx_queue_purge net/ipv4/tcp.c:2541 [inline] tcp_write_queue_purge+0x425/0x7d0 net/ipv4/tcp.c:2554 tcp_reset+0x109/0x4b0 net/ipv4/tcp_input.c:4053 tcp_validate_incoming+0xa2d/0x1660 net/ipv4/tcp_input.c:5414 tcp_rcv_state_process+0xb6b/0x4d93 net/ipv4/tcp_input.c:6052 tcp_v6_do_rcv+0x888/0x13c0 net/ipv6/tcp_ipv6.c:1353 tcp_v6_rcv+0x2c22/0x3530 net/ipv6/tcp_ipv6.c:1557 ip6_protocol_deliver_rcu+0x303/0x16c0 net/ipv6/ip6_input.c:394 ip6_input_finish+0x84/0x170 net/ipv6/ip6_input.c:434 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ip6_input+0xe4/0x3f0 net/ipv6/ip6_input.c:443 dst_input include/net/dst.h:450 [inline] ip6_rcv_finish+0x1e7/0x320 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] NF_HOOK include/linux/netfilter.h:283 [inline] ipv6_rcv+0x10e/0x420 net/ipv6/ip6_input.c:272 __netif_receive_skb_one_core+0x115/0x1a0 net/core/dev.c:4973 __netif_receive_skb+0x2c/0x1c0 net/core/dev.c:5083 process_backlog+0x206/0x750 net/core/dev.c:5923 napi_poll net/core/dev.c:6346 [inline] net_rx_action+0x4fa/0x1070 net/core/dev.c:6412 __do_softirq+0x266/0x95a kernel/softirq.c:293 do_softirq_own_stack+0x2a/0x40 arch/x86/entry/entry_64.S:1027 do_softirq.part.0+0x11a/0x170 kernel/softirq.c:338 do_softirq kernel/softirq.c:330 [inline] __local_bh_enable_ip+0x211/0x270 kernel/softirq.c:190 local_bh_enable include/linux/bottom_half.h:32 [inline] inet_csk_listen_stop+0x1e0/0x860 net/ipv4/inet_connection_sock.c:1002 tcp_close+0xd3e/0x10c0 net/ipv4/tcp.c:2361 inet_release+0x105/0x1f0 net/ipv4/af_inet.c:428 inet6_release+0x53/0x80 net/ipv6/af_inet6.c:473 __sock_release+0xd3/0x2b0 net/socket.c:579 sock_close+0x1b/0x30 net/socket.c:1162 __fput+0x2e5/0x8d0 fs/file_table.c:278 ____fput+0x16/0x20 fs/file_table.c:309 task_work_run+0x14a/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0x90a/0x2fa0 kernel/exit.c:876 do_group_exit+0x135/0x370 kernel/exit.c:980 get_signal+0x399/0x1d50 kernel/signal.c:2577 do_signal+0x87/0x1940 arch/x86/kernel/signal.c:816 exit_to_usermode_loop+0x244/0x2c0 arch/x86/entry/common.c:162 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x3f0/0x4a0 arch/x86/entry/common.c:268 ret_from_fork+0x15/0x50 arch/x86/entry/entry_64.S:344 RIP: 0033:0x45aa49 Code: ff 48 85 f6 0f 84 d7 8e fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c ae 8e fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 RSP: 002b:00007f50b4532db0 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f50b4533700 RCX: 000000000045aa49 RDX: 00007f50b45339d0 RSI: 00007f50b4532db0 RDI: 00000000003d0f00 RBP: 0000000000a4fcb0 R08: 00007f50b4533700 R09: 00007f50b4533700 R10: 00007f50b45339d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a4fb5f R14: 00007f50b45339c0 R15: 000000000073bfac Modules linked in: ---[ end trace fd02db52c7a06b4e ]--- RIP: 0010:put_page_testzero include/linux/mm.h:547 [inline] RIP: 0010:put_page include/linux/mm.h:993 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:2891 [inline] RIP: 0010:skb_release_data+0x5ac/0x7a0 net/core/skbuff.c:571 Code: 41 5d 41 5e 41 5f 5d c3 e8 c1 c0 fb fb 4c 8d 63 ff e9 b1 fc ff ff e8 b3 c0 fb fb 48 c7 c6 c0 88 fc 87 4c 89 e7 e8 34 1e 25 fc <0f> 0b e8 9d c0 fb fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff8880ae907508 EFLAGS: 00010206 RAX: ffff8880a7b72200 RBX: ffffea0001380c34 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff8199dda2 RDI: ffffea0001380c38 RBP: ffff8880ae907570 R08: 000000000000003e R09: ffff8880a7b72b40 R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0001380c00 R13: ffff88809995cbf0 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007f50b4533700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbbdb8f8518 CR3: 000000009a701000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400