[ 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 '10.128.0.192' (ECDSA) to the list of known hosts. 2021/06/20 12:21:17 parsed 1 programs 2021/06/20 12:21:17 executed programs: 0 syzkaller login: [ 1584.208474] IPVS: ftp: loaded support on port[0] = 21 [ 1584.332230] chnl_net:caif_netlink_parms(): no params data found [ 1584.422845] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.429738] bridge0: port 1(bridge_slave_0) entered disabled state [ 1584.436871] device bridge_slave_0 entered promiscuous mode [ 1584.447114] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.454136] bridge0: port 2(bridge_slave_1) entered disabled state [ 1584.462283] device bridge_slave_1 entered promiscuous mode [ 1584.480137] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 1584.488940] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 1584.508561] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 1584.516385] team0: Port device team_slave_0 added [ 1584.522650] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 1584.530864] team0: Port device team_slave_1 added [ 1584.546405] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1584.552720] 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. [ 1584.579297] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1584.591663] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1584.597980] 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. [ 1584.624142] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1584.635209] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 1584.642991] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 1584.663482] device hsr_slave_0 entered promiscuous mode [ 1584.669150] device hsr_slave_1 entered promiscuous mode [ 1584.675892] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 1584.683382] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 1584.751076] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.757492] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.764523] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.770944] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.803329] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 1584.809405] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1584.817455] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 1584.826635] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1584.836526] bridge0: port 1(bridge_slave_0) entered disabled state [ 1584.844032] bridge0: port 2(bridge_slave_1) entered disabled state [ 1584.851561] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1584.862547] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 1584.868730] 8021q: adding VLAN 0 to HW filter on device team0 [ 1584.878512] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1584.886580] bridge0: port 1(bridge_slave_0) entered blocking state [ 1584.893001] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1584.903786] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1584.911731] bridge0: port 2(bridge_slave_1) entered blocking state [ 1584.918056] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1584.938447] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1584.948384] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1584.961322] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 1584.968604] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1584.977193] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1584.985079] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1584.993091] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1585.000943] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1585.007696] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1585.022478] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 1585.032235] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1585.038988] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1585.051025] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1585.063756] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 1585.073400] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1585.108007] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 1585.115680] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 1585.123492] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 1585.133685] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1585.141736] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1585.148598] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1585.158476] device veth0_vlan entered promiscuous mode [ 1585.167742] device veth1_vlan entered promiscuous mode [ 1585.174304] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 1585.183270] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 1585.194933] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 1585.204825] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1585.212814] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1585.221121] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1585.231644] device veth0_macvtap entered promiscuous mode [ 1585.237805] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 1585.246624] device veth1_macvtap entered promiscuous mode [ 1585.255574] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 1585.265423] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 1585.275391] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1585.282452] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1585.290885] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1585.302143] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1585.308937] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1585.427241] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 1585.435138] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1585.443362] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1585.462400] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 1585.468949] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1585.477440] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1585.484775] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1585.493159] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1586.250706] Bluetooth: hci0: command 0x0409 tx timeout 2021/06/20 12:21:22 executed programs: 161 [ 1588.329688] Bluetooth: hci0: command 0x041b tx timeout [ 1589.982844] ================================================================== [ 1589.990456] BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x22c/0x240 [ 1589.997466] Read of size 8 at addr ffff8880a9f27140 by task syz-executor.0/9533 [ 1590.005066] [ 1590.006682] CPU: 1 PID: 9533 Comm: syz-executor.0 Not tainted 4.19.195-syzkaller #0 [ 1590.014455] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1590.023790] Call Trace: [ 1590.026379] dump_stack+0x1fc/0x2ef [ 1590.030008] print_address_description.cold+0x54/0x219 [ 1590.035303] kasan_report_error.cold+0x8a/0x1b9 [ 1590.039958] ? vgem_gem_dumb_create+0x22c/0x240 [ 1590.044705] __asan_report_load8_noabort+0x88/0x90 [ 1590.049628] ? drm_gem_object_put_unlocked+0x60/0x180 [ 1590.054812] ? vgem_gem_dumb_create+0x22c/0x240 [ 1590.059471] vgem_gem_dumb_create+0x22c/0x240 [ 1590.063963] drm_mode_create_dumb+0x27c/0x300 [ 1590.068453] drm_ioctl_kernel+0x208/0x2a0 [ 1590.072598] ? drm_mode_create_dumb+0x300/0x300 [ 1590.077248] ? drm_ioctl_permit+0x210/0x210 [ 1590.081556] ? __might_fault+0x192/0x1d0 [ 1590.085602] drm_ioctl+0x507/0x9c0 [ 1590.089127] ? drm_mode_create_dumb+0x300/0x300 [ 1590.093876] ? drm_getstats+0x20/0x20 [ 1590.097662] ? lock_downgrade+0x720/0x720 [ 1590.101793] ? check_preemption_disabled+0x41/0x280 [ 1590.106793] ? futex_exit_release+0x220/0x220 [ 1590.111284] ? drm_getstats+0x20/0x20 [ 1590.115085] do_vfs_ioctl+0xcdb/0x12e0 [ 1590.119057] ? lock_downgrade+0x720/0x720 [ 1590.123211] ? check_preemption_disabled+0x41/0x280 [ 1590.128210] ? ioctl_preallocate+0x200/0x200 [ 1590.132604] ? __fget+0x356/0x510 [ 1590.136055] ? do_dup2+0x450/0x450 [ 1590.139578] ? __se_sys_futex+0x298/0x3b0 [ 1590.143710] ksys_ioctl+0x9b/0xc0 [ 1590.147143] __x64_sys_ioctl+0x6f/0xb0 [ 1590.151049] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1590.155614] do_syscall_64+0xf9/0x620 [ 1590.159415] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1590.164608] RIP: 0033:0x4665d9 [ 1590.167872] 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 [ 1590.186776] RSP: 002b:00007f977dc1f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1590.194466] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 1590.201720] RDX: 0000000020000000 RSI: 00000000c02064b2 RDI: 0000000000000004 [ 1590.208982] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 1590.216234] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 1590.223499] R13: 00007ffd3b56e84f R14: 00007f977dc1f300 R15: 0000000000022000 [ 1590.230778] [ 1590.232397] Allocated by task 9533: [ 1590.236015] kmem_cache_alloc_trace+0x12f/0x380 [ 1590.240670] __vgem_gem_create+0x44/0xf0 [ 1590.244811] vgem_gem_dumb_create+0xcf/0x240 [ 1590.249202] drm_mode_create_dumb+0x27c/0x300 [ 1590.253681] drm_ioctl_kernel+0x208/0x2a0 [ 1590.257821] drm_ioctl+0x507/0x9c0 [ 1590.261343] do_vfs_ioctl+0xcdb/0x12e0 [ 1590.265212] ksys_ioctl+0x9b/0xc0 [ 1590.268646] __x64_sys_ioctl+0x6f/0xb0 [ 1590.272861] do_syscall_64+0xf9/0x620 [ 1590.276642] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1590.281805] [ 1590.283411] Freed by task 9533: [ 1590.286683] kfree+0xcc/0x210 [ 1590.289785] drm_gem_object_free+0x91/0x1c0 [ 1590.294090] drm_gem_object_put_unlocked+0xd1/0x180 [ 1590.299087] vgem_gem_dumb_create+0x10c/0x240 [ 1590.303564] drm_mode_create_dumb+0x27c/0x300 [ 1590.308053] drm_ioctl_kernel+0x208/0x2a0 [ 1590.312182] drm_ioctl+0x507/0x9c0 [ 1590.315705] do_vfs_ioctl+0xcdb/0x12e0 [ 1590.319586] ksys_ioctl+0x9b/0xc0 [ 1590.323044] __x64_sys_ioctl+0x6f/0xb0 [ 1590.326926] do_syscall_64+0xf9/0x620 [ 1590.330905] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1590.336071] [ 1590.337804] The buggy address belongs to the object at ffff8880a9f27040 [ 1590.337804] which belongs to the cache kmalloc-512 of size 512 [ 1590.350536] The buggy address is located 256 bytes inside of [ 1590.350536] 512-byte region [ffff8880a9f27040, ffff8880a9f27240) [ 1590.362393] The buggy address belongs to the page: [ 1590.367322] page:ffffea0002a7c9c0 count:1 mapcount:0 mapping:ffff88813bff0940 index:0xffff8880a9f277c0 [ 1590.376748] flags: 0xfff00000000100(slab) [ 1590.380879] raw: 00fff00000000100 ffffea0002a43f88 ffffea0002a4ce08 ffff88813bff0940 [ 1590.388857] raw: ffff8880a9f277c0 ffff8880a9f27040 0000000100000004 0000000000000000 [ 1590.396739] page dumped because: kasan: bad access detected [ 1590.402440] [ 1590.404047] Memory state around the buggy address: [ 1590.408956] ffff8880a9f27000: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 1590.416297] ffff8880a9f27080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1590.423725] >ffff8880a9f27100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1590.431075] ^ [ 1590.436503] ffff8880a9f27180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1590.443842] ffff8880a9f27200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 1590.451189] ================================================================== [ 1590.458535] Disabling lock debugging due to kernel taint [ 1590.467940] Bluetooth: hci0: command 0x040f tx timeout [ 1590.477048] Kernel panic - not syncing: panic_on_warn set ... [ 1590.477048] [ 1590.484434] CPU: 1 PID: 9533 Comm: syz-executor.0 Tainted: G B 4.19.195-syzkaller #0 [ 1590.493704] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1590.503056] Call Trace: [ 1590.505650] dump_stack+0x1fc/0x2ef [ 1590.509289] panic+0x26a/0x50e [ 1590.512515] ? __warn_printk+0xf3/0xf3 [ 1590.516408] ? preempt_schedule_common+0x45/0xc0 [ 1590.521169] ? ___preempt_schedule+0x16/0x18 [ 1590.525574] ? trace_hardirqs_on+0x55/0x210 [ 1590.529882] kasan_end_report+0x43/0x49 [ 1590.533839] kasan_report_error.cold+0xa7/0x1b9 [ 1590.538492] ? vgem_gem_dumb_create+0x22c/0x240 [ 1590.543240] __asan_report_load8_noabort+0x88/0x90 [ 1590.548164] ? drm_gem_object_put_unlocked+0x60/0x180 [ 1590.553430] ? vgem_gem_dumb_create+0x22c/0x240 [ 1590.558095] vgem_gem_dumb_create+0x22c/0x240 [ 1590.562594] drm_mode_create_dumb+0x27c/0x300 [ 1590.567097] drm_ioctl_kernel+0x208/0x2a0 [ 1590.571315] ? drm_mode_create_dumb+0x300/0x300 [ 1590.576023] ? drm_ioctl_permit+0x210/0x210 [ 1590.580343] ? __might_fault+0x192/0x1d0 [ 1590.584389] drm_ioctl+0x507/0x9c0 [ 1590.588029] ? drm_mode_create_dumb+0x300/0x300 [ 1590.592694] ? drm_getstats+0x20/0x20 [ 1590.596479] ? lock_downgrade+0x720/0x720 [ 1590.600634] ? check_preemption_disabled+0x41/0x280 [ 1590.605700] ? futex_exit_release+0x220/0x220 [ 1590.610194] ? drm_getstats+0x20/0x20 [ 1590.614106] do_vfs_ioctl+0xcdb/0x12e0 [ 1590.617977] ? lock_downgrade+0x720/0x720 [ 1590.622125] ? check_preemption_disabled+0x41/0x280 [ 1590.627123] ? ioctl_preallocate+0x200/0x200 [ 1590.631539] ? __fget+0x356/0x510 [ 1590.634975] ? do_dup2+0x450/0x450 [ 1590.638534] ? __se_sys_futex+0x298/0x3b0 [ 1590.642691] ksys_ioctl+0x9b/0xc0 [ 1590.646147] __x64_sys_ioctl+0x6f/0xb0 [ 1590.650107] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 1590.654671] do_syscall_64+0xf9/0x620 [ 1590.658625] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1590.663801] RIP: 0033:0x4665d9 [ 1590.666974] 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 [ 1590.685857] RSP: 002b:00007f977dc1f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 1590.693545] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 1590.700790] RDX: 0000000020000000 RSI: 00000000c02064b2 RDI: 0000000000000004 [ 1590.708035] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 1590.715286] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 1590.722553] R13: 00007ffd3b56e84f R14: 00007f977dc1f300 R15: 0000000000022000 [ 1590.730616] Kernel Offset: disabled [ 1590.734230] Rebooting in 86400 seconds..