[ OK ] Started Daily apt download activities. [ OK ] Started Daily apt upgrade and clean activities. Starting Permit User Sessions... [ OK ] Started Daily Cleanup of Temporary Directories. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Found device /dev/ttyS0. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.166' (ECDSA) to the list of known hosts. 2020/10/13 06:17:26 parsed 1 programs 2020/10/13 06:17:26 executed programs: 0 syzkaller login: [ 72.232433][ T28] audit: type=1400 audit(1602569846.904:8): avc: denied { execmem } for pid=6879 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 73.350257][ T6880] IPVS: ftp: loaded support on port[0] = 21 [ 73.512206][ T6880] chnl_net:caif_netlink_parms(): no params data found [ 73.570642][ T6880] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.578317][ T6880] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.587741][ T6880] device bridge_slave_0 entered promiscuous mode [ 73.596969][ T6880] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.604829][ T6880] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.613315][ T6880] device bridge_slave_1 entered promiscuous mode [ 73.636551][ T6880] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.647698][ T6880] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.672959][ T6880] team0: Port device team_slave_0 added [ 73.680365][ T6880] team0: Port device team_slave_1 added [ 73.701585][ T6880] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.708562][ T6880] 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. [ 73.735685][ T6880] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.749304][ T6880] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.756781][ T6880] 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. [ 73.783355][ T6880] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.812958][ T6880] device hsr_slave_0 entered promiscuous mode [ 73.819801][ T6880] device hsr_slave_1 entered promiscuous mode [ 73.926611][ T6880] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.936568][ T6880] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.954561][ T6880] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.964893][ T6880] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.991754][ T6880] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.998917][ T6880] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.006822][ T6880] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.013971][ T6880] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.064057][ T6880] 8021q: adding VLAN 0 to HW filter on device bond0 [ 74.079100][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 74.089824][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.098409][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.106864][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.120348][ T6880] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.133398][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.143169][ T17] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.150200][ T17] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.174765][ T2642] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.185401][ T2642] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.192557][ T2642] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.204333][ T2642] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.223261][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.232663][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.241591][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.258267][ T6880] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.272700][ T6880] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.281961][ T2642] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.302549][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.309968][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.324591][ T6880] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.345867][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.367098][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.376670][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.385206][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.396889][ T6880] device veth0_vlan entered promiscuous mode [ 74.408820][ T6880] device veth1_vlan entered promiscuous mode [ 74.432922][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.443364][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.452047][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.463265][ T6880] device veth0_macvtap entered promiscuous mode [ 74.474240][ T6880] device veth1_macvtap entered promiscuous mode [ 74.484528][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.502979][ T6880] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.510397][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.520348][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.533081][ T6880] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.540346][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.551828][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.563883][ T6880] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.577783][ T6880] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.587164][ T6880] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.595949][ T6880] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.682173][ T194] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.690146][ T194] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.728163][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.743027][ T194] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.752253][ T194] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.764602][ T3108] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 74.816107][ T7118] BTRFS: device fsid f90cac8b-044b-4fa8-8bee-4b8d3da88dc2 devid 1 transid 7 /dev/loop0 scanned by syz-executor.0 (7118) [ 74.839426][ T7118] BTRFS info (device loop0): turning on flush-on-commit [ 74.848146][ T7118] BTRFS info (device loop0): disk space caching is enabled [ 74.855904][ T7118] BTRFS info (device loop0): has skinny extents [ 74.900435][ T7118] BTRFS info (device loop0): enabling ssd optimizations [ 74.912504][ T7118] BTRFS info (device loop0): checking UUID tree [ 74.999835][ T7118] ------------[ cut here ]------------ [ 75.006173][ T7118] WARNING: CPU: 0 PID: 7118 at fs/fs-writeback.c:2469 __writeback_inodes_sb_nr+0x229/0x280 [ 75.016991][ T7118] Kernel panic - not syncing: panic_on_warn set ... [ 75.023582][ T7118] CPU: 0 PID: 7118 Comm: syz-executor.0 Not tainted 5.9.0-syzkaller #0 [ 75.031812][ T7118] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 75.041861][ T7118] Call Trace: [ 75.045150][ T7118] dump_stack+0x198/0x1fd [ 75.049471][ T7118] panic+0x382/0x7fb [ 75.053348][ T7118] ? __warn_printk+0xf3/0xf3 [ 75.057936][ T7118] ? printk+0xba/0xed [ 75.061913][ T7118] ? log_store.cold+0x16/0x16 [ 75.066586][ T7118] ? __warn.cold+0x5/0x4b [ 75.070912][ T7118] ? __warn+0xd6/0x1f2 [ 75.074987][ T7118] ? __writeback_inodes_sb_nr+0x229/0x280 [ 75.080726][ T7118] __warn.cold+0x20/0x4b [ 75.084986][ T7118] ? __writeback_inodes_sb_nr+0x229/0x280 [ 75.090700][ T7118] report_bug+0x1bd/0x210 [ 75.095041][ T7118] handle_bug+0x38/0x90 [ 75.099178][ T7118] ? mark_lock+0x82/0x1660 [ 75.103574][ T7118] exc_invalid_op+0x14/0x40 [ 75.108062][ T7118] asm_exc_invalid_op+0x12/0x20 [ 75.112896][ T7118] RIP: 0010:__writeback_inodes_sb_nr+0x229/0x280 [ 75.119203][ T7118] Code: 48 8b 84 24 c0 00 00 00 65 48 2b 04 25 28 00 00 00 75 38 48 81 c4 c8 00 00 00 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 f7 75 a7 ff <0f> 0b e9 69 ff ff ff 4c 89 f7 e8 a8 4e e8 ff e9 ea fe ff ff 4c 89 [ 75.138832][ T7118] RSP: 0018:ffffc900064076e0 EFLAGS: 00010293 [ 75.144882][ T7118] RAX: 0000000000000000 RBX: 1ffff92000c80edd RCX: ffffffff81cec880 [ 75.152852][ T7118] RDX: ffff888099db2200 RSI: ffffffff81cec919 RDI: 0000000000000007 [ 75.160810][ T7118] RBP: ffff8880994ec000 R08: 0000000000000000 R09: ffff8880994ec077 [ 75.168776][ T7118] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 75.176829][ T7118] R13: ffffc90006407708 R14: 0000000000006400 R15: ffff8880994ec158 [ 75.184808][ T7118] ? __writeback_inodes_sb_nr+0x190/0x280 [ 75.190529][ T7118] ? __writeback_inodes_sb_nr+0x229/0x280 [ 75.196260][ T7118] ? bdi_split_work_to_wbs+0xcf0/0xcf0 [ 75.201732][ T7118] ? get_nr_dirty_inodes+0x1b2/0x250 [ 75.207037][ T7118] btrfs_commit_transaction+0x8ea/0x2830 [ 75.212656][ T7118] ? btrfs_apply_pending_changes+0x110/0x110 [ 75.218616][ T7118] ? up_write+0x191/0x560 [ 75.222941][ T7118] ? dput+0x1d9/0xbc0 [ 75.226919][ T7118] ? downgrade_write+0x3a0/0x3a0 [ 75.231882][ T7118] ? btrfs_log_dentry_safe+0x70/0x90 [ 75.237165][ T7118] btrfs_sync_file+0x821/0xd80 [ 75.241936][ T7118] ? start_ordered_ops+0x110/0x110 [ 75.247031][ T7118] ? lock_downgrade+0x830/0x830 [ 75.251881][ T7118] ? do_raw_spin_lock+0x120/0x2b0 [ 75.256914][ T7118] ? start_ordered_ops+0x110/0x110 [ 75.262009][ T7118] vfs_fsync_range+0x13a/0x220 [ 75.266756][ T7118] btrfs_file_write_iter+0x1101/0x14a9 [ 75.272221][ T7118] ? btrfs_sync_file+0xd80/0xd80 [ 75.277150][ T7118] ? lock_is_held_type+0xbb/0xf0 [ 75.282073][ T7118] do_iter_readv_writev+0x532/0x7b0 [ 75.287272][ T7118] ? get_order+0x20/0x20 [ 75.291522][ T7118] do_iter_write+0x188/0x670 [ 75.296106][ T7118] ? __sb_start_write+0x1c9/0x450 [ 75.301118][ T7118] vfs_writev+0x1aa/0x2e0 [ 75.305451][ T7118] ? vfs_iter_write+0xa0/0xa0 [ 75.310107][ T7118] ? __fget_files+0x272/0x400 [ 75.314775][ T7118] ? __fget_files+0x294/0x400 [ 75.319458][ T7118] __x64_sys_pwritev+0x231/0x310 [ 75.324480][ T7118] ? __ia32_sys_preadv2+0x150/0x150 [ 75.329680][ T7118] ? check_preemption_disabled+0x50/0x130 [ 75.335496][ T7118] ? syscall_enter_from_user_mode+0x1d/0x60 [ 75.341388][ T7118] do_syscall_64+0x2d/0x70 [ 75.345803][ T7118] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 75.351684][ T7118] RIP: 0033:0x45de59 [ 75.355577][ T7118] Code: 0d b4 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 75.362160][ T17] Bluetooth: hci0: command 0x0409 tx timeout [ 75.375790][ T7118] RSP: 002b:00007f098f185c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 [ 75.375829][ T7118] RAX: ffffffffffffffda RBX: 0000000000026400 RCX: 000000000045de59 [ 75.375838][ T7118] RDX: 0000000000000001 RSI: 00000000200014c0 RDI: 0000000000000003 [ 75.375847][ T7118] RBP: 000000000118bf70 R08: 0000000000000020 R09: 0000000000000000 [ 75.375856][ T7118] R10: 0000000000000002 R11: 0000000000000246 R12: 000000000118bf2c [ 75.375865][ T7118] R13: 00007ffe7dd36ddf R14: 00007f098f1869c0 R15: 000000000118bf2c [ 75.383071][ T7118] Kernel Offset: disabled [ 75.435501][ T7118] Rebooting in 86400 seconds..