page:ffffea00024a9600 count:0 mapcount:-128 mapping:0000000000000000 index:0x0 flags: 0x1fffc0000000000() raw: 01fffc0000000000 ffffea000185a208 ffff88812fffc878 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: 27348 Comm: syz-executor.0 Not tainted 5.0.0+ #139 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 61 05 fc fb 4c 8d 63 ff e9 b1 fc ff ff e8 53 05 fc fb 48 c7 c6 40 7a fc 87 4c 89 e7 e8 74 62 25 fc <0f> 0b e8 3d 05 fc fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff8880696e7708 EFLAGS: 00010293 RAX: ffff88808db4e1c0 RBX: ffffea00024a9634 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199d1e2 RDI: ffffea00024a9638 RBP: ffff8880696e7770 R08: 000000000000003e R09: ffffed1015d05011 R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00024a9600 R13: ffff8880a8762340 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f62da0f5700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f62da0f4db8 CR3: 000000009fdb8000 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:2575 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:00007f62da0f4cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 0000000000000001 RBX: 000000000073c0e8 RCX: 0000000000458209 RDX: 00000000004be59b RSI: 0000000000000081 RDI: 000000000073c0ec RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000073c0ec R13: 00007fff451601df R14: 00007f62da0f59c0 R15: 000000000073c0ec Modules linked in: ---[ end trace b713742d813ab2f1 ]--- 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 61 05 fc fb 4c 8d 63 ff e9 b1 fc ff ff e8 53 05 fc fb 48 c7 c6 40 7a fc 87 4c 89 e7 e8 74 62 25 fc <0f> 0b e8 3d 05 fc fb 4d 8d 66 0e 48 b8 00 00 00 00 00 fc ff df 4c RSP: 0018:ffff8880696e7708 EFLAGS: 00010293 RAX: ffff88808db4e1c0 RBX: ffffea00024a9634 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8199d1e2 RDI: ffffea00024a9638 RBP: ffff8880696e7770 R08: 000000000000003e R09: ffffed1015d05011 R10: ffffed1015d05010 R11: ffff8880ae828087 R12: ffffea00024a9600 R13: ffff8880a8762340 R14: 0000000000000001 R15: dffffc0000000000 FS: 00007f62da0f5700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000a5048d CR3: 00000000985b0000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400