[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty2. [ 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 '10.128.0.71' (ECDSA) to the list of known hosts. 2020/04/14 18:53:48 parsed 1 programs syzkaller login: [ 74.048251][ T7156] ld (7156) used greatest stack depth: 23352 bytes left 2020/04/14 18:53:51 executed programs: 0 [ 74.549373][ T7160] IPVS: ftp: loaded support on port[0] = 21 [ 74.655092][ T7160] chnl_net:caif_netlink_parms(): no params data found [ 74.712942][ T7160] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.722079][ T7160] bridge0: port 1(bridge_slave_0) entered disabled state [ 74.731912][ T7160] device bridge_slave_0 entered promiscuous mode [ 74.741466][ T7160] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.749271][ T7160] bridge0: port 2(bridge_slave_1) entered disabled state [ 74.758464][ T7160] device bridge_slave_1 entered promiscuous mode [ 74.781831][ T7160] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 74.793107][ T7160] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 74.817581][ T7160] team0: Port device team_slave_0 added [ 74.827124][ T7160] team0: Port device team_slave_1 added [ 74.848304][ T7160] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 74.855554][ T7160] 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. [ 74.882751][ T7160] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 74.896424][ T7160] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 74.903545][ T7160] 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. [ 74.930482][ T7160] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 74.999828][ T7160] device hsr_slave_0 entered promiscuous mode [ 75.046619][ T7160] device hsr_slave_1 entered promiscuous mode [ 75.189083][ T7160] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 75.250471][ T7160] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 75.299070][ T7160] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 75.350032][ T7160] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 75.424373][ T7160] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.431824][ T7160] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.440173][ T7160] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.447708][ T7160] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.502424][ T7160] 8021q: adding VLAN 0 to HW filter on device bond0 [ 75.517350][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 75.531090][ T2973] bridge0: port 1(bridge_slave_0) entered disabled state [ 75.539952][ T2973] bridge0: port 2(bridge_slave_1) entered disabled state [ 75.549209][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 75.564057][ T7160] 8021q: adding VLAN 0 to HW filter on device team0 [ 75.576499][ T2702] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 75.588107][ T2702] bridge0: port 1(bridge_slave_0) entered blocking state [ 75.595321][ T2702] bridge0: port 1(bridge_slave_0) entered forwarding state [ 75.617588][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 75.627237][ T2973] bridge0: port 2(bridge_slave_1) entered blocking state [ 75.634462][ T2973] bridge0: port 2(bridge_slave_1) entered forwarding state [ 75.652105][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 75.661257][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 75.670500][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 75.679747][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 75.696420][ T7160] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 75.706944][ T7160] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 75.720172][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 75.730258][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 75.740281][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 75.750492][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 75.760767][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 75.778653][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 75.795566][ T7160] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 75.803920][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 75.811690][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 75.833592][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 75.842951][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 75.868074][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 75.877857][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 75.889177][ T7160] device veth0_vlan entered promiscuous mode [ 75.897591][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 75.905594][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 75.920445][ T7160] device veth1_vlan entered promiscuous mode [ 75.949075][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 75.959609][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 75.971468][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 75.981509][ T2973] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 75.993069][ T7160] device veth0_macvtap entered promiscuous mode [ 76.005054][ T7160] device veth1_macvtap entered promiscuous mode [ 76.023644][ T7160] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 76.032424][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 76.041766][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 76.050555][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 76.059687][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 76.072667][ T7160] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 76.082276][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 76.091850][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 76.278802][ T7369] ================================================================== [ 76.278916][ T7369] BUG: KASAN: global-out-of-bounds in fb_pad_aligned_buffer+0x137/0x150 [ 76.278925][ T7369] Read of size 1 at addr ffffffff88754580 by task syz-executor.0/7369 [ 76.278927][ T7369] [ 76.278938][ T7369] CPU: 0 PID: 7369 Comm: syz-executor.0 Not tainted 5.7.0-rc1-next-20200414-syzkaller #0 [ 76.278943][ T7369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.278950][ T7369] Call Trace: [ 76.278976][ T7369] dump_stack+0x188/0x20d [ 76.279009][ T7369] print_address_description.constprop.0.cold+0x5/0x315 [ 76.279019][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279027][ T7369] __kasan_report.cold+0x35/0x4d [ 76.279038][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279048][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279056][ T7369] kasan_report+0x33/0x50 [ 76.279066][ T7369] fb_pad_aligned_buffer+0x137/0x150 [ 76.279082][ T7369] bit_putcs+0xc21/0xe10 [ 76.279102][ T7369] ? bit_cursor+0x1900/0x1900 [ 76.279110][ T7369] ? vesafb_probe.cold+0x1162/0x1162 [ 76.279122][ T7369] ? fb_get_color_depth.part.0+0xc6/0x1f0 [ 76.279142][ T7369] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 76.279153][ T7369] fbcon_putcs+0x345/0x3f0 [ 76.279162][ T7369] ? bit_cursor+0x1900/0x1900 [ 76.279188][ T7369] do_update_region+0x398/0x630 [ 76.279202][ T7369] ? con_get_trans_old+0x280/0x280 [ 76.279213][ T7369] ? fbcon_set_palette+0x3b1/0x4a0 [ 76.279220][ T7369] ? var_to_display+0x7f0/0x7f0 [ 76.279232][ T7369] redraw_screen+0x64c/0x770 [ 76.279246][ T7369] ? lock_acquire+0x1f2/0x8f0 [ 76.279256][ T7369] ? respond_string+0x290/0x290 [ 76.279270][ T7369] fbcon_do_set_font+0x815/0x950 [ 76.279282][ T7369] fbcon_copy_font+0x125/0x190 [ 76.279290][ T7369] ? fbcon_do_set_font+0x950/0x950 [ 76.279299][ T7369] con_font_op+0x666/0x1160 [ 76.279310][ T7369] ? lock_downgrade+0x840/0x840 [ 76.279318][ T7369] ? con_write+0xe0/0xe0 [ 76.279335][ T7369] ? __might_fault+0x190/0x1d0 [ 76.279349][ T7369] vt_ioctl+0x1793/0x26b0 [ 76.279372][ T7369] ? tomoyo_read_control+0x4b0/0x4c0 [ 76.279385][ T7369] ? lockdep_hardirqs_on+0x463/0x620 [ 76.279395][ T7369] ? complete_change_console+0x3a0/0x3a0 [ 76.279406][ T7369] ? tomoyo_path_number_perm+0x238/0x4d0 [ 76.279416][ T7369] ? tomoyo_execute_permission+0x470/0x470 [ 76.279428][ T7369] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 76.279439][ T7369] ? complete_change_console+0x3a0/0x3a0 [ 76.279450][ T7369] tty_ioctl+0xedc/0x1440 [ 76.279460][ T7369] ? tty_vhangup+0x30/0x30 [ 76.279483][ T7369] ? do_vfs_ioctl+0x50c/0x12d0 [ 76.279494][ T7369] ? ioctl_file_clone+0x180/0x180 [ 76.279515][ T7369] ? __fget_files+0x32f/0x500 [ 76.279528][ T7369] ? do_dup2+0x520/0x520 [ 76.279539][ T7369] ? __x64_sys_futex+0x380/0x4f0 [ 76.279551][ T7369] ? tty_vhangup+0x30/0x30 [ 76.279561][ T7369] ksys_ioctl+0x11a/0x180 [ 76.279571][ T7369] __x64_sys_ioctl+0x6f/0xb0 [ 76.279580][ T7369] ? lockdep_hardirqs_on+0x463/0x620 [ 76.279599][ T7369] do_syscall_64+0xf6/0x7d0 [ 76.279641][ T7369] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 76.279653][ T7369] RIP: 0033:0x45c889 [ 76.279662][ T7369] Code: ad 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.279668][ T7369] RSP: 002b:00007ff6bb2f7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.279677][ T7369] RAX: ffffffffffffffda RBX: 00007ff6bb2f86d4 RCX: 000000000045c889 [ 76.279684][ T7369] RDX: 0000000020000080 RSI: 0000000000004b72 RDI: 0000000000000003 [ 76.279692][ T7369] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 76.279699][ T7369] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 76.279707][ T7369] R13: 000000000000036e R14: 00000000004c5e3f R15: 000000000076bf0c [ 76.279728][ T7369] [ 76.279733][ T7369] The buggy address belongs to the variable: [ 76.279758][ T7369] fontdata_8x16+0x1000/0x1120 [ 76.279763][ T7369] [ 76.279767][ T7369] Memory state around the buggy address: [ 76.279780][ T7369] ffffffff88754480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.279791][ T7369] ffffffff88754500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.279798][ T7369] >ffffffff88754580: fa fa fa fa 06 fa fa fa fa fa fa fa 05 fa fa fa [ 76.279802][ T7369] ^ [ 76.279808][ T7369] ffffffff88754600: fa fa fa fa 06 fa fa fa fa fa fa fa 00 00 03 fa [ 76.279815][ T7369] ffffffff88754680: fa fa fa fa 00 00 00 00 00 00 00 00 00 00 00 00 [ 76.279818][ T7369] ================================================================== [ 76.279822][ T7369] Disabling lock debugging due to kernel taint [ 76.279826][ T7369] Kernel panic - not syncing: panic_on_warn set ... [ 76.279836][ T7369] CPU: 0 PID: 7369 Comm: syz-executor.0 Tainted: G B 5.7.0-rc1-next-20200414-syzkaller #0 [ 76.279840][ T7369] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.279842][ T7369] Call Trace: [ 76.279850][ T7369] dump_stack+0x188/0x20d [ 76.279867][ T7369] panic+0x2e3/0x75c [ 76.279877][ T7369] ? add_taint.cold+0x16/0x16 [ 76.279887][ T7369] ? print_shadow_for_address+0xb8/0x114 [ 76.279903][ T7369] ? trace_hardirqs_on+0x55/0x220 [ 76.279911][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279919][ T7369] end_report+0x4d/0x53 [ 76.279927][ T7369] __kasan_report.cold+0xd/0x4d [ 76.279935][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279943][ T7369] ? fb_pad_aligned_buffer+0x137/0x150 [ 76.279950][ T7369] kasan_report+0x33/0x50 [ 76.279959][ T7369] fb_pad_aligned_buffer+0x137/0x150 [ 76.279968][ T7369] bit_putcs+0xc21/0xe10 [ 76.279979][ T7369] ? bit_cursor+0x1900/0x1900 [ 76.279986][ T7369] ? vesafb_probe.cold+0x1162/0x1162 [ 76.279995][ T7369] ? fb_get_color_depth.part.0+0xc6/0x1f0 [ 76.280004][ T7369] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 76.280011][ T7369] fbcon_putcs+0x345/0x3f0 [ 76.280019][ T7369] ? bit_cursor+0x1900/0x1900 [ 76.280027][ T7369] do_update_region+0x398/0x630 [ 76.280037][ T7369] ? con_get_trans_old+0x280/0x280 [ 76.280045][ T7369] ? fbcon_set_palette+0x3b1/0x4a0 [ 76.280054][ T7369] ? var_to_display+0x7f0/0x7f0 [ 76.280063][ T7369] redraw_screen+0x64c/0x770 [ 76.280071][ T7369] ? lock_acquire+0x1f2/0x8f0 [ 76.280079][ T7369] ? respond_string+0x290/0x290 [ 76.280088][ T7369] fbcon_do_set_font+0x815/0x950 [ 76.280096][ T7369] fbcon_copy_font+0x125/0x190 [ 76.280103][ T7369] ? fbcon_do_set_font+0x950/0x950 [ 76.280111][ T7369] con_font_op+0x666/0x1160 [ 76.280119][ T7369] ? lock_downgrade+0x840/0x840 [ 76.280127][ T7369] ? con_write+0xe0/0xe0 [ 76.280137][ T7369] ? __might_fault+0x190/0x1d0 [ 76.280146][ T7369] vt_ioctl+0x1793/0x26b0 [ 76.280154][ T7369] ? tomoyo_read_control+0x4b0/0x4c0 [ 76.280161][ T7369] ? lockdep_hardirqs_on+0x463/0x620 [ 76.280170][ T7369] ? complete_change_console+0x3a0/0x3a0 [ 76.280178][ T7369] ? tomoyo_path_number_perm+0x238/0x4d0 [ 76.280187][ T7369] ? tomoyo_execute_permission+0x470/0x470 [ 76.280196][ T7369] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 76.280205][ T7369] ? complete_change_console+0x3a0/0x3a0 [ 76.280212][ T7369] tty_ioctl+0xedc/0x1440 [ 76.280220][ T7369] ? tty_vhangup+0x30/0x30 [ 76.280229][ T7369] ? do_vfs_ioctl+0x50c/0x12d0 [ 76.280237][ T7369] ? ioctl_file_clone+0x180/0x180 [ 76.280246][ T7369] ? __fget_files+0x32f/0x500 [ 76.280254][ T7369] ? do_dup2+0x520/0x520 [ 76.280262][ T7369] ? __x64_sys_futex+0x380/0x4f0 [ 76.280271][ T7369] ? tty_vhangup+0x30/0x30 [ 76.280279][ T7369] ksys_ioctl+0x11a/0x180 [ 76.280287][ T7369] __x64_sys_ioctl+0x6f/0xb0 [ 76.280295][ T7369] ? lockdep_hardirqs_on+0x463/0x620 [ 76.280303][ T7369] do_syscall_64+0xf6/0x7d0 [ 76.280313][ T7369] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 76.280318][ T7369] RIP: 0033:0x45c889 [ 76.280326][ T7369] Code: ad 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.280330][ T7369] RSP: 002b:00007ff6bb2f7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.280337][ T7369] RAX: ffffffffffffffda RBX: 00007ff6bb2f86d4 RCX: 000000000045c889 [ 76.280341][ T7369] RDX: 0000000020000080 RSI: 0000000000004b72 RDI: 0000000000000003 [ 76.280345][ T7369] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 76.280349][ T7369] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 76.280354][ T7369] R13: 000000000000036e R14: 00000000004c5e3f R15: 000000000076bf0c [ 76.281990][ T7369] Kernel Offset: disabled [ 77.132131][ T7369] Rebooting in 86400 seconds..