page:ffffea00018a2600 count:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x1fffc0000000000() raw: 01fffc0000000000 ffffea000182d808 ffffea00026caa08 0000000000000000 raw: 0000000000000000 0000000000000003 00000000ffffff7f 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: 0 PID: 28599 Comm: syz-executor.5 Not tainted 5.1.0-rc2+ #145 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 b1 b2 fb fb 4c 8d 63 ff e9 b1 fc ff ff e8 a3 b2 fb fb 48 c7 c6 40 89 fc 87 4c 89 e7 e8 94 12 25 fc <0f> 0b e8 8d b2 fb fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff88805ada7708 EFLAGS: 00010293 RAX: ffff888060400580 RBX: ffffea00018a2634 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199e202 RDI: ffffea00018a2638 RBP: ffff88805ada7770 R08: 000000000000003e R09: ffffed1015d25011 R10: ffffed1015d25010 R11: ffff8880ae928087 R12: ffffea00018a2600 R13: ffff888098f7d0c0 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f0a227fd700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000200d7d0 CR3: 000000008e0f2000 CR4: 00000000001406f0 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:1469 [inline] tcp_write_queue_purge+0x253/0x7d0 net/ipv4/tcp.c:2552 tcp_disconnect+0x402/0x1890 net/ipv4/tcp.c:2592 tcp_close+0xe37/0x10c0 net/ipv4/tcp.c:2393 tls_sk_proto_close+0x40d/0x7a0 net/tls/tls_main.c:292 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:599 sock_close+0x1b/0x30 net/socket.c:1247 __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 arch/x86/entry/common.c:268 [inline] do_syscall_64+0x52d/0x610 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x458209 Code: Bad RIP value. RSP: 002b:00007f0a227fccf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000073bf08 RCX: 0000000000458209 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073bf08 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073bf0c R13: 00007ffebe3433cf R14: 00007f0a227fd9c0 R15: 000000000073bf0c Modules linked in: ---[ end trace f62a225ea0df9a98 ]--- 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 b1 b2 fb fb 4c 8d 63 ff e9 b1 fc ff ff e8 a3 b2 fb fb 48 c7 c6 40 89 fc 87 4c 89 e7 e8 94 12 25 fc <0f> 0b e8 8d b2 fb fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff88805ada7708 EFLAGS: 00010293 RAX: ffff888060400580 RBX: ffffea00018a2634 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199e202 RDI: ffffea00018a2638 RBP: ffff88805ada7770 R08: 000000000000003e R09: ffffed1015d25011 R10: ffffed1015d25010 R11: ffff8880ae928087 R12: ffffea00018a2600 R13: ffff888098f7d0c0 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f0a227fd700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0c1e87ddb8 CR3: 000000006b1d4000 CR4: 00000000001406e0