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: 8127 Comm: syz-executor.3 Not tainted 5.1.0-rc2+ #147 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 54 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:ffff88805d1c7708 EFLAGS: 00010293 RAX: ffff888069fe0480 RBX: ffffea00019e1034 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199e1c2 RDI: ffffea00019e1038 RBP: ffff88805d1c7770 R08: 000000000000003e R09: ffffed1015d03ef1 R10: ffffed1015d03ef0 R11: ffff8880ae81f787 R12: ffffea00019e1000 R13: ffff88809fdc2c00 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f8983e6f700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000875b3000 CR4: 00000000001406f0 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: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: ad b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8983e6ecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000073c048 RCX: 0000000000458209 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000073c048 RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073c04c R13: 00007ffda0ea76ff R14: 00007f8983e6f9c0 R15: 000000000073c04c Modules linked in: ---[ end trace 2fa91e143e8168e8 ]--- 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 54 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:ffff88805d1c7708 EFLAGS: 00010293 RAX: ffff888069fe0480 RBX: ffffea00019e1034 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199e1c2 RDI: ffffea00019e1038 RBP: ffff88805d1c7770 R08: 000000000000003e R09: ffffed1015d03ef1 R10: ffffed1015d03ef0 R11: ffff8880ae81f787 R12: ffffea00019e1000 R13: ffff88809fdc2c00 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f8983e6f700(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffca9143fe8 CR3: 0000000074682000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400