raw: 0000000000000000 0000000000000000 00000002ffffffff 0000000000000000 page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) ------------[ cut here ]------------ IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready kernel BUG at include/linux/mm.h:519! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 RIP: 0010:put_page_testzero include/linux/mm.h:519 [inline] RIP: 0010:put_page include/linux/mm.h:962 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:2842 [inline] RIP: 0010:skb_release_data+0x3bf/0x920 net/core/skbuff.c:577 ieee80211 phy10: Selected rate control algorithm 'minstrel_ht' Code: b4 0a fb e9 2a fe ff ff e8 3e c9 f1 fa 48 8d 6b ff e9 b5 fe ff ff e8 30 c9 f1 fa 48 c7 c6 20 50 4c 89 48 89 ef e8 e1 5a 19 fb <0f> 0b 4c 8b 34 24 e8 16 c9 f1 fa 49 8d 7e 08 48 b8 00 00 00 00 00 RSP: 0018:ffff8880b5acf468 EFLAGS: 00010206 RAX: ffff8880b5aba4c0 RBX: ffffea0002714e34 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff8670bc4f RDI: ffffea0002714e38 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 RBP: ffffea0002714e00 R08: 000000000000003e R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880ab6f1530 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005641359dea28 CR3: 0000000098e79000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211 phy11: Selected rate control algorithm 'minstrel_ht' skb_release_all net/core/skbuff.c:640 [inline] __kfree_skb+0x46/0x60 net/core/skbuff.c:654 sk_wmem_free_skb include/net/sock.h:1468 [inline] tcp_write_queue_purge+0x24d/0x800 net/ipv4/tcp.c:2543 tcp_reset+0xfe/0x490 net/ipv4/tcp_input.c:4085 wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 tcp_validate_incoming+0x117d/0x1670 net/ipv4/tcp_input.c:5456 tcp_rcv_state_process+0xb7a/0x4c50 net/ipv4/tcp_input.c:6096 wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready tcp_v6_do_rcv+0x47c/0x1370 net/ipv6/tcp_ipv6.c:1373 tcp_v6_rcv+0x26b8/0x3990 net/ipv6/tcp_ipv6.c:1577 IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready ip6_input_finish+0x46a/0x17a0 net/ipv6/ip6_input.c:385 NF_HOOK include/linux/netfilter.h:289 [inline] ip6_input+0xcf/0x3c0 net/ipv6/ip6_input.c:428 IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 dst_input include/net/dst.h:461 [inline] ip6_rcv_finish+0x1d9/0x2f0 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:289 [inline] ipv6_rcv+0xf2/0x3f0 net/ipv6/ip6_input.c:273 ieee80211 phy12: Selected rate control algorithm 'minstrel_ht' __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:4954 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 __netif_receive_skb+0x27/0x1c0 net/core/dev.c:5066 process_backlog+0x241/0x700 net/core/dev.c:5849 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready napi_poll net/core/dev.c:6280 [inline] net_rx_action+0x4ac/0xfb0 net/core/dev.c:6346 wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready __do_softirq+0x265/0x980 kernel/softirq.c:292 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 run_ksoftirqd+0x57/0x110 kernel/softirq.c:653 smpboot_thread_fn+0x655/0x9e0 kernel/smpboot.c:164 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ---[ end trace f08762c810c89bd6 ]--- RIP: 0010:put_page_testzero include/linux/mm.h:519 [inline] RIP: 0010:put_page include/linux/mm.h:962 [inline] RIP: 0010:__skb_frag_unref include/linux/skbuff.h:2842 [inline] RIP: 0010:skb_release_data+0x3bf/0x920 net/core/skbuff.c:577 Code: b4 0a fb e9 2a fe ff ff e8 3e c9 f1 fa 48 8d 6b ff e9 b5 fe ff ff e8 30 c9 f1 fa 48 c7 c6 20 50 4c 89 48 89 ef e8 e1 5a 19 fb <0f> 0b 4c 8b 34 24 e8 16 c9 f1 fa 49 8d 7e 08 48 b8 00 00 00 00 00 RSP: 0018:ffff8880b5acf468 EFLAGS: 00010206 RAX: ffff8880b5aba4c0 RBX: ffffea0002714e34 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff8670bc4f RDI: ffffea0002714e38 RBP: ffffea0002714e00 R08: 000000000000003e R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880ab6f1530 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005641359dea28 CR3: 0000000098e79000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400