[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. 2020/07/29 05:58:28 parsed 1 programs 2020/07/29 05:58:28 executed programs: 0 syzkaller login: [ 61.841734][ T6846] IPVS: ftp: loaded support on port[0] = 21 [ 61.941403][ T6846] chnl_net:caif_netlink_parms(): no params data found [ 61.997191][ T6846] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.006661][ T6846] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.028992][ T6846] device bridge_slave_0 entered promiscuous mode [ 62.038689][ T6846] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.046527][ T6846] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.054825][ T6846] device bridge_slave_1 entered promiscuous mode [ 62.075573][ T6846] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 62.086642][ T6846] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 62.110468][ T6846] team0: Port device team_slave_0 added [ 62.118081][ T6846] team0: Port device team_slave_1 added [ 62.135835][ T6846] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 62.143720][ T6846] 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. [ 62.170701][ T6846] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 62.183425][ T6846] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 62.190559][ T6846] 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. [ 62.216796][ T6846] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 62.276870][ T6846] device hsr_slave_0 entered promiscuous mode [ 62.324014][ T6846] device hsr_slave_1 entered promiscuous mode [ 62.432637][ T6846] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 62.496786][ T6846] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 62.566608][ T6846] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 62.646041][ T6846] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 62.700195][ T6846] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.707433][ T6846] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.715627][ T6846] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.722708][ T6846] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.770497][ T6846] 8021q: adding VLAN 0 to HW filter on device bond0 [ 62.787530][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 62.799521][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 62.807871][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 62.816123][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 62.829928][ T6846] 8021q: adding VLAN 0 to HW filter on device team0 [ 62.841015][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 62.850043][ T3208] bridge0: port 1(bridge_slave_0) entered blocking state [ 62.857315][ T3208] bridge0: port 1(bridge_slave_0) entered forwarding state [ 62.871001][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 62.880219][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 62.887904][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 62.915357][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 62.924665][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 62.934436][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 62.944570][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 62.958486][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 62.967160][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 62.979418][ T6846] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 62.998293][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 63.007220][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 63.020629][ T6846] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 63.043725][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 63.052517][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 63.073140][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 63.088796][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 63.101288][ T6846] device veth0_vlan entered promiscuous mode [ 63.109222][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 63.117993][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 63.132277][ T6846] device veth1_vlan entered promiscuous mode [ 63.153970][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 63.162344][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 63.171481][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 63.180640][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 63.193361][ T6846] device veth0_macvtap entered promiscuous mode [ 63.203550][ T6846] device veth1_macvtap entered promiscuous mode [ 63.221795][ T6846] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 63.229430][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 63.239414][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 63.248110][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 63.256880][ T3208] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 63.269151][ T6846] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 63.277558][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 63.286602][ T3205] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 64.487312][ T7123] ================================================================== [ 64.487384][ T7123] BUG: KASAN: global-out-of-bounds in bit_putcs+0xbb6/0xd20 [ 64.487397][ T7123] Read of size 1 at addr ffffffff889658ee by task syz-executor.0/7123 [ 64.487401][ T7123] [ 64.487416][ T7123] CPU: 0 PID: 7123 Comm: syz-executor.0 Not tainted 5.8.0-rc7-syzkaller #0 [ 64.487424][ T7123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.487429][ T7123] Call Trace: [ 64.487446][ T7123] dump_stack+0x18f/0x20d [ 64.487463][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.487484][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.487502][ T7123] print_address_description.constprop.0.cold+0x5/0x436 [ 64.487519][ T7123] ? asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 64.487534][ T7123] ? lockdep_hardirqs_off+0x66/0xa0 [ 64.487549][ T7123] ? vprintk_func+0x97/0x1a6 [ 64.487566][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.487578][ T7123] kasan_report.cold+0x1f/0x37 [ 64.487595][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.487612][ T7123] bit_putcs+0xbb6/0xd20 [ 64.487643][ T7123] ? bit_cursor+0x17d0/0x17d0 [ 64.487658][ T7123] ? vga16fb_update_fix+0x4a0/0x4a0 [ 64.487683][ T7123] ? fb_get_color_depth+0x11a/0x240 [ 64.487701][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.487719][ T7123] ? bit_cursor+0x17d0/0x17d0 [ 64.487732][ T7123] fbcon_putcs+0x33c/0x3f0 [ 64.487756][ T7123] do_update_region+0x399/0x630 [ 64.487779][ T7123] ? con_get_trans_old+0x280/0x280 [ 64.487810][ T7123] ? fbcon_set_palette+0x3a8/0x490 [ 64.487824][ T7123] ? var_to_display+0x7f0/0x7f0 [ 64.487844][ T7123] redraw_screen+0x64c/0x770 [ 64.487859][ T7123] ? lock_acquire+0x1f1/0xad0 [ 64.487876][ T7123] ? vc_init+0x440/0x440 [ 64.487900][ T7123] fbcon_do_set_font+0x7ec/0x950 [ 64.487920][ T7123] fbcon_copy_font+0x125/0x190 [ 64.487935][ T7123] ? fbcon_do_set_font+0x950/0x950 [ 64.487949][ T7123] con_font_op+0x65a/0x1110 [ 64.487966][ T7123] ? lock_downgrade+0x820/0x820 [ 64.487979][ T7123] ? con_write+0xb0/0xb0 [ 64.488004][ T7123] ? __might_fault+0x190/0x1d0 [ 64.488023][ T7123] vt_ioctl+0x16dc/0x2670 [ 64.488039][ T7123] ? trace_print_print+0x40/0x110 [ 64.488052][ T7123] ? lockdep_hardirqs_on+0x6a/0xe0 [ 64.488066][ T7123] ? vt_waitactive+0x350/0x350 [ 64.488084][ T7123] ? tomoyo_path_number_perm+0x244/0x4d0 [ 64.488102][ T7123] ? tomoyo_execute_permission+0x470/0x470 [ 64.488123][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.488140][ T7123] ? tty_jobctrl_ioctl+0x4d/0x1010 [ 64.488153][ T7123] ? vt_waitactive+0x350/0x350 [ 64.488172][ T7123] tty_ioctl+0x1019/0x15f0 [ 64.488190][ T7123] ? tty_fasync+0x390/0x390 [ 64.488207][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.488223][ T7123] ? do_vfs_ioctl+0x27d/0x1090 [ 64.488238][ T7123] ? generic_block_fiemap+0x60/0x60 [ 64.488253][ T7123] ? __might_fault+0x190/0x1d0 [ 64.488267][ T7123] ? _copy_to_user+0x126/0x160 [ 64.488289][ T7123] ? __fget_files+0x294/0x400 [ 64.488312][ T7123] ? tty_fasync+0x390/0x390 [ 64.488326][ T7123] ksys_ioctl+0x11a/0x180 [ 64.488343][ T7123] __x64_sys_ioctl+0x6f/0xb0 [ 64.488355][ T7123] ? lockdep_hardirqs_on+0x6a/0xe0 [ 64.488371][ T7123] do_syscall_64+0x60/0xe0 [ 64.488387][ T7123] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.488399][ T7123] RIP: 0033:0x45c369 [ 64.488414][ T7123] Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.488422][ T7123] RSP: 002b:00007f964bd66c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 64.488437][ T7123] RAX: ffffffffffffffda RBX: 000000000000f580 RCX: 000000000045c369 [ 64.488445][ T7123] RDX: 0000000020000480 RSI: 0000000000004b72 RDI: 0000000000000008 [ 64.488454][ T7123] RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 [ 64.488463][ T7123] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c [ 64.488472][ T7123] R13: 00007ffe44916cdf R14: 00007f964bd679c0 R15: 000000000078bf0c [ 64.488499][ T7123] [ 64.488505][ T7123] The buggy address belongs to the variable: [ 64.488518][ T7123] oid_index+0x3ee/0xa00 [ 64.488522][ T7123] [ 64.488527][ T7123] Memory state around the buggy address: [ 64.488539][ T7123] ffffffff88965780: 00 05 fa fa fa fa fa fa 03 fa fa fa fa fa fa fa [ 64.488550][ T7123] ffffffff88965800: 03 fa fa fa fa fa fa fa 03 fa fa fa fa fa fa fa [ 64.488561][ T7123] >ffffffff88965880: 00 07 fa fa fa fa fa fa 00 07 fa fa fa fa fa fa [ 64.488568][ T7123] ^ [ 64.488579][ T7123] ffffffff88965900: 00 06 fa fa fa fa fa fa 06 fa fa fa fa fa fa fa [ 64.488590][ T7123] ffffffff88965980: 00 00 00 04 fa fa fa fa 00 00 fa fa fa fa fa fa [ 64.488595][ T7123] ================================================================== [ 64.488600][ T7123] Disabling lock debugging due to kernel taint [ 64.488663][ T7123] Kernel panic - not syncing: panic_on_warn set ... [ 64.488677][ T7123] CPU: 0 PID: 7123 Comm: syz-executor.0 Tainted: G B 5.8.0-rc7-syzkaller #0 [ 64.488685][ T7123] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.488688][ T7123] Call Trace: [ 64.488702][ T7123] dump_stack+0x18f/0x20d [ 64.488716][ T7123] ? bit_putcs+0xac0/0xd20 [ 64.488730][ T7123] panic+0x2e3/0x75c [ 64.488744][ T7123] ? __warn_printk+0xf3/0xf3 [ 64.488760][ T7123] ? preempt_schedule_common+0x59/0xc0 [ 64.488773][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.488789][ T7123] ? preempt_schedule_thunk+0x16/0x18 [ 64.488801][ T7123] ? trace_hardirqs_on+0x55/0x220 [ 64.488815][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.488827][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.488838][ T7123] end_report+0x4d/0x53 [ 64.488850][ T7123] kasan_report.cold+0xd/0x37 [ 64.488864][ T7123] ? bit_putcs+0xbb6/0xd20 [ 64.488876][ T7123] bit_putcs+0xbb6/0xd20 [ 64.488897][ T7123] ? bit_cursor+0x17d0/0x17d0 [ 64.488910][ T7123] ? vga16fb_update_fix+0x4a0/0x4a0 [ 64.488927][ T7123] ? fb_get_color_depth+0x11a/0x240 [ 64.488942][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.488957][ T7123] ? bit_cursor+0x17d0/0x17d0 [ 64.488969][ T7123] fbcon_putcs+0x33c/0x3f0 [ 64.488986][ T7123] do_update_region+0x399/0x630 [ 64.489004][ T7123] ? con_get_trans_old+0x280/0x280 [ 64.489018][ T7123] ? fbcon_set_palette+0x3a8/0x490 [ 64.489030][ T7123] ? var_to_display+0x7f0/0x7f0 [ 64.489045][ T7123] redraw_screen+0x64c/0x770 [ 64.489058][ T7123] ? lock_acquire+0x1f1/0xad0 [ 64.489072][ T7123] ? vc_init+0x440/0x440 [ 64.489088][ T7123] fbcon_do_set_font+0x7ec/0x950 [ 64.489104][ T7123] fbcon_copy_font+0x125/0x190 [ 64.489117][ T7123] ? fbcon_do_set_font+0x950/0x950 [ 64.489128][ T7123] con_font_op+0x65a/0x1110 [ 64.489142][ T7123] ? lock_downgrade+0x820/0x820 [ 64.489153][ T7123] ? con_write+0xb0/0xb0 [ 64.489169][ T7123] ? __might_fault+0x190/0x1d0 [ 64.489182][ T7123] vt_ioctl+0x16dc/0x2670 [ 64.489196][ T7123] ? trace_print_print+0x40/0x110 [ 64.489208][ T7123] ? lockdep_hardirqs_on+0x6a/0xe0 [ 64.489220][ T7123] ? vt_waitactive+0x350/0x350 [ 64.489234][ T7123] ? tomoyo_path_number_perm+0x244/0x4d0 [ 64.489249][ T7123] ? tomoyo_execute_permission+0x470/0x470 [ 64.489266][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.489280][ T7123] ? tty_jobctrl_ioctl+0x4d/0x1010 [ 64.489291][ T7123] ? vt_waitactive+0x350/0x350 [ 64.489305][ T7123] tty_ioctl+0x1019/0x15f0 [ 64.489319][ T7123] ? tty_fasync+0x390/0x390 [ 64.489334][ T7123] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 64.489346][ T7123] ? do_vfs_ioctl+0x27d/0x1090 [ 64.489358][ T7123] ? generic_block_fiemap+0x60/0x60 [ 64.489370][ T7123] ? __might_fault+0x190/0x1d0 [ 64.489381][ T7123] ? _copy_to_user+0x126/0x160 [ 64.489396][ T7123] ? __fget_files+0x294/0x400 [ 64.489413][ T7123] ? tty_fasync+0x390/0x390 [ 64.489425][ T7123] ksys_ioctl+0x11a/0x180 [ 64.489439][ T7123] __x64_sys_ioctl+0x6f/0xb0 [ 64.489450][ T7123] ? lockdep_hardirqs_on+0x6a/0xe0 [ 64.489464][ T7123] do_syscall_64+0x60/0xe0 [ 64.489486][ T7123] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.489496][ T7123] RIP: 0033:0x45c369 [ 64.489509][ T7123] Code: 8d b6 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 5b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 64.489516][ T7123] RSP: 002b:00007f964bd66c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 64.489528][ T7123] RAX: ffffffffffffffda RBX: 000000000000f580 RCX: 000000000045c369 [ 64.489535][ T7123] RDX: 0000000020000480 RSI: 0000000000004b72 RDI: 0000000000000008 [ 64.489543][ T7123] RBP: 000000000078bf40 R08: 0000000000000000 R09: 0000000000000000 [ 64.489550][ T7123] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c [ 64.489558][ T7123] R13: 00007ffe44916cdf R14: 00007f964bd679c0 R15: 000000000078bf0c [ 64.490651][ T7123] Kernel Offset: disabled [ 65.355630][ T7123] Rebooting in 86400 seconds..