Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.21' (ECDSA) to the list of known hosts. 2021/03/28 01:57:22 parsed 1 programs 2021/03/28 01:57:22 executed programs: 0 syzkaller login: [ 73.888024][ T8404] IPVS: ftp: loaded support on port[0] = 21 [ 74.050810][ T8404] chnl_net:caif_netlink_parms(): no params data found [ 74.101304][ T8404] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.111965][ T8404] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.122256][ T8404] device bridge_slave_0 entered promiscuous mode [ 74.132046][ T8404] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.139449][ T8404] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.147489][ T8404] device bridge_slave_1 entered promiscuous mode [ 74.168603][ T8404] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.180172][ T8404] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.203254][ T8404] team0: Port device team_slave_0 added [ 74.210645][ T8404] team0: Port device team_slave_1 added [ 74.228379][ T8404] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.236061][ T8404] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 74.263476][ T8404] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.277778][ T8404] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.285362][ T8404] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 74.311700][ T8404] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.339569][ T8404] device hsr_slave_0 entered promiscuous mode [ 74.346438][ T8404] device hsr_slave_1 entered promiscuous mode [ 74.472951][ T8404] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 74.488307][ T8404] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 74.498897][ T8404] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 74.510645][ T8404] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 74.544758][ T8404] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.552141][ T8404] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.560385][ T8404] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.567619][ T8404] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.641813][ T8404] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.661248][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.675337][ T7] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.684956][ T7] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.695498][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.710723][ T8404] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.721859][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.730778][ T8624] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.737955][ T8624] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.752033][ T4819] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.761671][ T4819] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.768914][ T4819] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.787958][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.798086][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.810566][ T4819] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.830349][ T8404] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 74.842602][ T8404] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.855503][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.864909][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.873077][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.894149][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.901556][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.913751][ T8404] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.935415][ T8624] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.955981][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.966370][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.975561][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.991738][ T8404] device veth0_vlan entered promiscuous mode [ 75.009555][ T8404] device veth1_vlan entered promiscuous mode [ 75.032492][ T4819] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.041911][ T4819] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.051205][ T4819] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.062916][ T8404] device veth0_macvtap entered promiscuous mode [ 75.075078][ T8404] device veth1_macvtap entered promiscuous mode [ 75.092908][ T8404] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 75.101019][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 75.110857][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 75.123357][ T8404] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 75.131677][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 75.140669][ T8] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 75.155849][ T8404] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.164886][ T8404] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.173571][ T8404] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.184740][ T8404] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 75.277243][ T9] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.297589][ T9] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.313088][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 75.341458][ T53] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 75.351933][ T53] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 75.368788][ T36] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 75.418622][ T8647] ------------[ cut here ]------------ [ 75.425419][ T8647] refcount_t: underflow; use-after-free. [ 75.431630][ T8647] WARNING: CPU: 1 PID: 8647 at lib/refcount.c:28 refcount_warn_saturate+0x1d1/0x1e0 [ 75.442717][ T8647] Modules linked in: [ 75.447421][ T8647] CPU: 1 PID: 8647 Comm: syz-executor.0 Not tainted 5.12.0-rc4-syzkaller #0 [ 75.458699][ T8647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.468954][ T8647] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 75.476863][ T8647] Code: e9 db fe ff ff 48 89 df e8 fc ee ee fd e9 8a fe ff ff e8 42 44 ab fd 48 c7 c7 c0 d8 c1 89 c6 05 2b 31 e8 09 01 e8 7c 2b f9 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 75.500901][ T8647] RSP: 0018:ffffc900023afb10 EFLAGS: 00010286 [ 75.507719][ T8647] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 75.518230][ T8647] RDX: ffff88801b13d4c0 RSI: ffffffff815c4d15 RDI: fffff52000475f54 [ 75.527617][ T8647] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.536216][ T8647] R10: ffffffff815bdaae R11: 0000000000000000 R12: 0000000000000000 [ 75.544958][ T8647] R13: ffff888144088018 R14: ffffffff8daa1b00 R15: ffff88802deddd60 [ 75.552951][ T8647] FS: 00000000020b1400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 75.564359][ T8647] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 75.570967][ T8647] CR2: 000055a697d15820 CR3: 00000000267ce000 CR4: 00000000001506f0 [ 75.580582][ T8647] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 75.590746][ T8647] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 75.599470][ T8647] Call Trace: [ 75.602766][ T8647] nfc_llcp_local_put+0x1ab/0x200 [ 75.609943][ T8647] llcp_sock_destruct+0x81/0x150 [ 75.615485][ T8647] ? nfc_llcp_sock_free+0x220/0x220 [ 75.620690][ T8647] __sk_destruct+0x4b/0x900 [ 75.627717][ T8647] sk_destruct+0xbd/0xe0 [ 75.631971][ T8647] __sk_free+0xef/0x3d0 [ 75.637039][ T8647] sock_wfree+0x129/0x240 [ 75.641398][ T8647] ? __sk_receive_skb+0x830/0x830 [ 75.647373][ T8647] skb_release_head_state+0x9f/0x250 [ 75.652667][ T8647] kfree_skb+0xfa/0x3f0 [ 75.657993][ T8647] skb_queue_purge+0x14/0x30 [ 75.662603][ T8647] nfc_llcp_socket_release+0x2e/0x870 [ 75.669768][ T8647] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 75.677127][ T8647] local_cleanup+0x18/0xb0 [ 75.681572][ T8647] nfc_llcp_local_put+0x18c/0x200 [ 75.687724][ T8647] llcp_sock_destruct+0x81/0x150 [ 75.692695][ T8647] ? nfc_llcp_sock_free+0x220/0x220 [ 75.699425][ T8647] __sk_destruct+0x4b/0x900 [ 75.705418][ T8647] sk_destruct+0xbd/0xe0 [ 75.709670][ T8647] __sk_free+0xef/0x3d0 [ 75.715192][ T8647] sk_free+0x78/0xa0 [ 75.719138][ T8647] llcp_sock_release+0x3c9/0x580 [ 75.725183][ T8647] __sock_release+0xcd/0x280 [ 75.729804][ T8647] sock_close+0x18/0x20 [ 75.735159][ T8647] __fput+0x288/0x920 [ 75.739178][ T8647] ? __sock_release+0x280/0x280 [ 75.745160][ T8647] task_work_run+0xdd/0x1a0 [ 75.749714][ T8647] exit_to_user_mode_prepare+0x249/0x250 [ 75.756467][ T8647] syscall_exit_to_user_mode+0x19/0x60 [ 75.761952][ T8647] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 75.768820][ T8647] RIP: 0033:0x41926b [ 75.772724][ T8647] Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 [ 75.793953][ T8647] RSP: 002b:00007ffd5d462370 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 75.802561][ T8647] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041926b [ 75.812597][ T8647] RDX: ffffffffffffffbc RSI: 0000000000000081 RDI: 0000000000000004 [ 75.821213][ T8647] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 75.829897][ T8647] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000005709d0 [ 75.838044][ T8647] R13: 00007ffd5d462490 R14: 000000000056bf60 R15: 0000000000012697 [ 75.846251][ T8647] Kernel panic - not syncing: panic_on_warn set ... [ 75.852852][ T8647] CPU: 1 PID: 8647 Comm: syz-executor.0 Not tainted 5.12.0-rc4-syzkaller #0 [ 75.861549][ T8647] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.871603][ T8647] Call Trace: [ 75.874898][ T8647] dump_stack+0x141/0x1d7 [ 75.879251][ T8647] panic+0x306/0x73d [ 75.883157][ T8647] ? __warn_printk+0xf3/0xf3 [ 75.887923][ T8647] ? __warn.cold+0x1a/0x44 [ 75.892358][ T8647] ? refcount_warn_saturate+0x1d1/0x1e0 [ 75.898010][ T8647] __warn.cold+0x35/0x44 [ 75.902282][ T8647] ? refcount_warn_saturate+0x1d1/0x1e0 [ 75.907850][ T8647] report_bug+0x1bd/0x210 [ 75.912205][ T8647] handle_bug+0x3c/0x60 [ 75.916384][ T8647] exc_invalid_op+0x14/0x40 [ 75.920913][ T8647] asm_exc_invalid_op+0x12/0x20 [ 75.925778][ T8647] RIP: 0010:refcount_warn_saturate+0x1d1/0x1e0 [ 75.931947][ T8647] Code: e9 db fe ff ff 48 89 df e8 fc ee ee fd e9 8a fe ff ff e8 42 44 ab fd 48 c7 c7 c0 d8 c1 89 c6 05 2b 31 e8 09 01 e8 7c 2b f9 04 <0f> 0b e9 af fe ff ff 0f 1f 84 00 00 00 00 00 41 56 41 55 41 54 55 [ 75.951572][ T8647] RSP: 0018:ffffc900023afb10 EFLAGS: 00010286 [ 75.957659][ T8647] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 75.965653][ T8647] RDX: ffff88801b13d4c0 RSI: ffffffff815c4d15 RDI: fffff52000475f54 [ 75.973733][ T8647] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 75.981722][ T8647] R10: ffffffff815bdaae R11: 0000000000000000 R12: 0000000000000000 [ 75.989704][ T8647] R13: ffff888144088018 R14: ffffffff8daa1b00 R15: ffff88802deddd60 [ 75.997688][ T8647] ? wake_up_klogd.part.0+0x8e/0xd0 [ 76.002928][ T8647] ? vprintk_func+0x95/0x1e0 [ 76.007539][ T8647] nfc_llcp_local_put+0x1ab/0x200 [ 76.012581][ T8647] llcp_sock_destruct+0x81/0x150 [ 76.017532][ T8647] ? nfc_llcp_sock_free+0x220/0x220 [ 76.022766][ T8647] __sk_destruct+0x4b/0x900 [ 76.027288][ T8647] sk_destruct+0xbd/0xe0 [ 76.031540][ T8647] __sk_free+0xef/0x3d0 [ 76.035710][ T8647] sock_wfree+0x129/0x240 [ 76.040063][ T8647] ? __sk_receive_skb+0x830/0x830 [ 76.045100][ T8647] skb_release_head_state+0x9f/0x250 [ 76.050436][ T8647] kfree_skb+0xfa/0x3f0 [ 76.054616][ T8647] skb_queue_purge+0x14/0x30 [ 76.059222][ T8647] nfc_llcp_socket_release+0x2e/0x870 [ 76.064624][ T8647] ? _raw_spin_unlock_irqrestore+0x3d/0x70 [ 76.070451][ T8647] local_cleanup+0x18/0xb0 [ 76.074881][ T8647] nfc_llcp_local_put+0x18c/0x200 [ 76.079923][ T8647] llcp_sock_destruct+0x81/0x150 [ 76.084872][ T8647] ? nfc_llcp_sock_free+0x220/0x220 [ 76.090085][ T8647] __sk_destruct+0x4b/0x900 [ 76.094603][ T8647] sk_destruct+0xbd/0xe0 [ 76.098873][ T8647] __sk_free+0xef/0x3d0 [ 76.103056][ T8647] sk_free+0x78/0xa0 [ 76.106980][ T8647] llcp_sock_release+0x3c9/0x580 [ 76.111941][ T8647] __sock_release+0xcd/0x280 [ 76.116560][ T8647] sock_close+0x18/0x20 [ 76.120725][ T8647] __fput+0x288/0x920 [ 76.124810][ T8647] ? __sock_release+0x280/0x280 [ 76.129678][ T8647] task_work_run+0xdd/0x1a0 [ 76.134198][ T8647] exit_to_user_mode_prepare+0x249/0x250 [ 76.139870][ T8647] syscall_exit_to_user_mode+0x19/0x60 [ 76.145341][ T8647] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 76.151268][ T8647] RIP: 0033:0x41926b [ 76.155190][ T8647] Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 [ 76.174824][ T8647] RSP: 002b:00007ffd5d462370 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 76.183456][ T8647] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000041926b [ 76.191442][ T8647] RDX: ffffffffffffffbc RSI: 0000000000000081 RDI: 0000000000000004 [ 76.199423][ T8647] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 76.207399][ T8647] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000005709d0 [ 76.215375][ T8647] R13: 00007ffd5d462490 R14: 000000000056bf60 R15: 0000000000012697 [ 76.223635][ T8647] Kernel Offset: disabled [ 76.228098][ T8647] Rebooting in 86400 seconds..