[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.158' (ECDSA) to the list of known hosts. 2021/05/24 07:25:33 parsed 1 programs 2021/05/24 07:25:33 executed programs: 0 syzkaller login: [ 1582.915228] IPVS: ftp: loaded support on port[0] = 21 [ 1583.021188] chnl_net:caif_netlink_parms(): no params data found [ 1583.150399] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.157138] bridge0: port 1(bridge_slave_0) entered disabled state [ 1583.164429] device bridge_slave_0 entered promiscuous mode [ 1583.172906] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.180091] bridge0: port 2(bridge_slave_1) entered disabled state [ 1583.187694] device bridge_slave_1 entered promiscuous mode [ 1583.207984] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 1583.218007] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 1583.237943] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 1583.245977] team0: Port device team_slave_0 added [ 1583.252346] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 1583.260094] team0: Port device team_slave_1 added [ 1583.275980] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1583.282320] 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. [ 1583.308748] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1583.321063] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1583.327914] 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. [ 1583.353730] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1583.364872] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 1583.372935] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 1583.393357] device hsr_slave_0 entered promiscuous mode [ 1583.399213] device hsr_slave_1 entered promiscuous mode [ 1583.405227] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 1583.414272] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 1583.481245] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.487706] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1583.494530] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.500984] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1583.534029] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 1583.541554] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1583.550567] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 1583.560763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1583.569464] bridge0: port 1(bridge_slave_0) entered disabled state [ 1583.576427] bridge0: port 2(bridge_slave_1) entered disabled state [ 1583.584077] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1583.594524] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 1583.600779] 8021q: adding VLAN 0 to HW filter on device team0 [ 1583.610477] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1583.618731] bridge0: port 1(bridge_slave_0) entered blocking state [ 1583.625086] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1583.647871] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1583.655604] bridge0: port 2(bridge_slave_1) entered blocking state [ 1583.663168] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1583.671647] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1583.680235] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1583.688573] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1583.696004] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1583.704100] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1583.712562] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 1583.719117] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1583.732458] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 1583.740889] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1583.748172] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1583.760650] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1583.773289] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 1583.784613] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1583.818244] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 1583.825414] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 1583.833296] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 1583.843501] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1583.851510] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1583.859822] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1583.869020] device veth0_vlan entered promiscuous mode [ 1583.878975] device veth1_vlan entered promiscuous mode [ 1583.884865] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 1583.894028] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 1583.905748] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 1583.915425] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1583.922900] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1583.930524] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1583.939903] device veth0_macvtap entered promiscuous mode [ 1583.946218] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 1583.955110] device veth1_macvtap entered promiscuous mode [ 1583.964331] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 1583.974155] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 1583.984738] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1583.991887] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1584.000377] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1584.010768] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 1584.017778] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1584.024435] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1584.033625] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1584.152560] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1584.159879] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1584.178650] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1584.192300] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1584.201913] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 1584.209474] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1584.217197] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1584.224116] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1584.937616] Bluetooth: hci0: command 0x0409 tx timeout 2021/05/24 07:25:38 executed programs: 171 [ 1587.026765] Bluetooth: hci0: command 0x041b tx timeout [ 1589.096860] Bluetooth: hci0: command 0x040f tx timeout [ 1591.176680] Bluetooth: hci0: command 0x0419 tx timeout 2021/05/24 07:25:43 executed programs: 768 [ 1594.187669] ================================================================== [ 1594.195257] BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x22c/0x240 [ 1594.202272] Read of size 8 at addr ffff8880a9f7a380 by task syz-executor.0/11713 [ 1594.211972] [ 1594.213592] CPU: 1 PID: 11713 Comm: syz-executor.0 Not tainted 4.19.191-syzkaller #0 [ 1594.221456] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1594.230802] Call Trace: [ 1594.233439] dump_stack+0x1fc/0x2ef [ 1594.237092] print_address_description.cold+0x54/0x219 [ 1594.247929] kasan_report_error.cold+0x8a/0x1b9 [ 1594.252610] ? vgem_gem_dumb_create+0x22c/0x240 [ 1594.257321] __asan_report_load8_noabort+0x88/0x90 [ 1594.262284] ? drm_gem_object_put_unlocked+0xa0/0x180 [ 1594.267463] ? vgem_gem_dumb_create+0x22c/0x240 [ 1594.272248] vgem_gem_dumb_create+0x22c/0x240 [ 1594.276749] drm_mode_create_dumb+0x27c/0x300 [ 1594.281234] drm_ioctl_kernel+0x208/0x2a0 [ 1594.285376] ? drm_mode_create_dumb+0x300/0x300 [ 1594.290059] ? drm_ioctl_permit+0x210/0x210 [ 1594.294459] ? __might_fault+0x192/0x1d0 [ 1594.298608] drm_ioctl+0x507/0x9c0 [ 1594.302163] ? drm_mode_create_dumb+0x300/0x300 [ 1594.306818] ? drm_getstats+0x20/0x20 [ 1594.310619] ? debug_check_no_obj_freed+0x201/0x490 [ 1594.315636] ? futex_exit_release+0x220/0x220 [ 1594.320128] ? lock_acquire+0x170/0x3c0 [ 1594.324097] ? debug_check_no_obj_freed+0xb5/0x490 [ 1594.329012] ? drm_getstats+0x20/0x20 [ 1594.332805] do_vfs_ioctl+0xcdb/0x12e0 [ 1594.336694] ? lock_downgrade+0x720/0x720 [ 1594.340832] ? check_preemption_disabled+0x41/0x280 [ 1594.345841] ? ioctl_preallocate+0x200/0x200 [ 1594.350243] ? __fget+0x356/0x510 [ 1594.353698] ? do_dup2+0x450/0x450 [ 1594.357225] ? __se_sys_futex+0x298/0x3b0 [ 1594.361369] ksys_ioctl+0x9b/0xc0 [ 1594.364811] __x64_sys_ioctl+0x6f/0xb0 [ 1594.368694] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1594.373380] do_syscall_64+0xf9/0x620 [ 1594.377172] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1594.382349] RIP: 0033:0x4665d9 [ 1594.385527] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 [ 1594.404614] RSP: 002b:00007f25ded78188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1594.412321] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 1594.419609] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000003 [ 1594.426883] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 1594.434142] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 1594.441402] R13: 00007fff9ac78aef R14: 00007f25ded78300 R15: 0000000000022000 [ 1594.448687] [ 1594.450299] Allocated by task 11713: [ 1594.454040] kmem_cache_alloc_trace+0x12f/0x380 [ 1594.458697] __vgem_gem_create+0x44/0xf0 [ 1594.462750] vgem_gem_dumb_create+0xcf/0x240 [ 1594.467164] drm_mode_create_dumb+0x27c/0x300 [ 1594.471644] drm_ioctl_kernel+0x208/0x2a0 [ 1594.475785] drm_ioctl+0x507/0x9c0 [ 1594.479311] do_vfs_ioctl+0xcdb/0x12e0 [ 1594.483199] ksys_ioctl+0x9b/0xc0 [ 1594.486808] __x64_sys_ioctl+0x6f/0xb0 [ 1594.490717] do_syscall_64+0xf9/0x620 [ 1594.494502] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1594.499670] [ 1594.501278] Freed by task 11713: [ 1594.504640] kfree+0xcc/0x210 [ 1594.507753] drm_gem_object_free+0x91/0x1c0 [ 1594.512071] drm_gem_object_put_unlocked+0xd1/0x180 [ 1594.517074] vgem_gem_dumb_create+0x10c/0x240 [ 1594.521566] drm_mode_create_dumb+0x27c/0x300 [ 1594.526056] drm_ioctl_kernel+0x208/0x2a0 [ 1594.530187] drm_ioctl+0x507/0x9c0 [ 1594.533739] do_vfs_ioctl+0xcdb/0x12e0 [ 1594.537623] ksys_ioctl+0x9b/0xc0 [ 1594.541058] __x64_sys_ioctl+0x6f/0xb0 [ 1594.544938] do_syscall_64+0xf9/0x620 [ 1594.548723] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1594.553891] [ 1594.555503] The buggy address belongs to the object at ffff8880a9f7a280 [ 1594.555503] which belongs to the cache kmalloc-512 of size 512 [ 1594.568150] The buggy address is located 256 bytes inside of [ 1594.568150] 512-byte region [ffff8880a9f7a280, ffff8880a9f7a480) [ 1594.580027] The buggy address belongs to the page: [ 1594.584956] page:ffffea0002a7de80 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 1594.593099] flags: 0xfff00000000100(slab) [ 1594.597251] raw: 00fff00000000100 ffffea0002886688 ffffea0002a49d48 ffff88813bff0940 [ 1594.605130] raw: 0000000000000000 ffff8880a9f7a000 0000000100000006 0000000000000000 [ 1594.613005] page dumped because: kasan: bad access detected [ 1594.618698] [ 1594.620308] Memory state around the buggy address: [ 1594.625245] ffff8880a9f7a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1594.632602] ffff8880a9f7a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1594.640133] >ffff8880a9f7a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1594.647475] ^ [ 1594.650827] ffff8880a9f7a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1594.658434] ffff8880a9f7a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1594.666122] ================================================================== [ 1594.673463] Disabling lock debugging due to kernel taint [ 1594.680444] Kernel panic - not syncing: panic_on_warn set ... [ 1594.680444] [ 1594.687877] CPU: 1 PID: 11713 Comm: syz-executor.0 Tainted: G B 4.19.191-syzkaller #0 [ 1594.697240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1594.706602] Call Trace: [ 1594.709205] dump_stack+0x1fc/0x2ef [ 1594.712864] panic+0x26a/0x50e [ 1594.716135] ? __warn_printk+0xf3/0xf3 [ 1594.720036] ? preempt_schedule_common+0x45/0xc0 [ 1594.724795] ? ___preempt_schedule+0x16/0x18 [ 1594.729189] ? trace_hardirqs_on+0x55/0x210 [ 1594.733498] kasan_end_report+0x43/0x49 [ 1594.737475] kasan_report_error.cold+0xa7/0x1b9 [ 1594.742146] ? vgem_gem_dumb_create+0x22c/0x240 [ 1594.746804] __asan_report_load8_noabort+0x88/0x90 [ 1594.751724] ? drm_gem_object_put_unlocked+0xa0/0x180 [ 1594.756914] ? vgem_gem_dumb_create+0x22c/0x240 [ 1594.761584] vgem_gem_dumb_create+0x22c/0x240 [ 1594.766085] drm_mode_create_dumb+0x27c/0x300 [ 1594.770574] drm_ioctl_kernel+0x208/0x2a0 [ 1594.774719] ? drm_mode_create_dumb+0x300/0x300 [ 1594.779374] ? drm_ioctl_permit+0x210/0x210 [ 1594.783705] ? __might_fault+0x192/0x1d0 [ 1594.787768] drm_ioctl+0x507/0x9c0 [ 1594.791347] ? drm_mode_create_dumb+0x300/0x300 [ 1594.796037] ? drm_getstats+0x20/0x20 [ 1594.799842] ? debug_check_no_obj_freed+0x201/0x490 [ 1594.804849] ? futex_exit_release+0x220/0x220 [ 1594.809357] ? lock_acquire+0x170/0x3c0 [ 1594.813347] ? debug_check_no_obj_freed+0xb5/0x490 [ 1594.818266] ? drm_getstats+0x20/0x20 [ 1594.822064] do_vfs_ioctl+0xcdb/0x12e0 [ 1594.825942] ? lock_downgrade+0x720/0x720 [ 1594.830078] ? check_preemption_disabled+0x41/0x280 [ 1594.835080] ? ioctl_preallocate+0x200/0x200 [ 1594.839480] ? __fget+0x356/0x510 [ 1594.843043] ? do_dup2+0x450/0x450 [ 1594.846595] ? __se_sys_futex+0x298/0x3b0 [ 1594.850750] ksys_ioctl+0x9b/0xc0 [ 1594.854199] __x64_sys_ioctl+0x6f/0xb0 [ 1594.858086] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1594.862663] do_syscall_64+0xf9/0x620 [ 1594.866466] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1594.871643] RIP: 0033:0x4665d9 [ 1594.874833] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 [ 1594.894400] RSP: 002b:00007f25ded78188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1594.902280] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 1594.909548] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000003 [ 1594.916825] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 1594.924095] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 1594.931365] R13: 00007fff9ac78aef R14: 00007f25ded78300 R15: 0000000000022000 [ 1594.939241] Kernel Offset: disabled [ 1594.942861] Rebooting in 86400 seconds..