[ 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 '10.128.0.69' (ECDSA) to the list of known hosts. syzkaller login: [ 37.516629] IPVS: ftp: loaded support on port[0] = 21 [ 37.528578] IPVS: ftp: loaded support on port[0] = 21 [ 37.543954] IPVS: ftp: loaded support on port[0] = 21 [ 37.544944] IPVS: ftp: loaded support on port[0] = 21 [ 37.560868] IPVS: ftp: loaded support on port[0] = 21 [ 37.575181] IPVS: ftp: loaded support on port[0] = 21 [ 37.946460] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 37.995613] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.043760] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.054183] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.062483] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.087129] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.093734] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.105701] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.114087] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.123210] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.139316] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.155310] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.157663] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 38.162874] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.172111] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.186406] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.194223] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.202279] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.209772] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.217553] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.225327] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.245486] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.260458] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.283932] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.295783] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.311648] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 38.320318] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.322855] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.333707] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 38.337739] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.341683] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.349741] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 38.360140] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.367915] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.375838] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.380717] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.398306] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 38.405963] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 38.416243] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 38.426070] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.430651] hrtimer: interrupt took 43035 ns [ 38.433999] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 executing program executing program executing program executing program [ 38.446994] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.448068] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 38.462661] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 38.481110] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 executing program [ 38.499437] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 38.530321] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program executing program executing program executing program [ 38.569630] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 39.560945] Bluetooth: hci0: command 0x0409 tx timeout [ 39.561183] Bluetooth: hci1: command 0x0409 tx timeout [ 39.567987] Bluetooth: hci5: command 0x0409 tx timeout [ 39.578812] Bluetooth: hci3: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program [ 39.646921] Bluetooth: hci2: command 0x0409 tx timeout executing program [ 39.693412] Bluetooth: hci4: command 0x0409 tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 41.660081] Bluetooth: hci5: command 0x041b tx timeout [ 41.665663] Bluetooth: hci1: command 0x041b tx timeout [ 41.691430] Bluetooth: hci0: command 0x041b tx timeout executing program executing program executing program executing program executing program [ 41.791019] Bluetooth: hci2: command 0x041b tx timeout [ 41.800265] Bluetooth: hci3: command 0x041b tx timeout executing program [ 41.846483] Bluetooth: hci4: command 0x041b tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 43.718136] Bluetooth: hci1: command 0x040f tx timeout [ 43.723633] Bluetooth: hci5: command 0x040f tx timeout executing program executing program executing program [ 43.807409] Bluetooth: hci0: command 0x040f tx timeout executing program executing program executing program executing program executing program [ 43.888111] Bluetooth: hci3: command 0x040f tx timeout [ 43.893697] Bluetooth: hci2: command 0x040f tx timeout executing program executing program executing program [ 43.958739] Bluetooth: hci4: command 0x040f tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 45.043592] ================================================================== [ 45.051133] BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x22c/0x240 [ 45.058165] Read of size 8 at addr ffff8880a88938c0 by task syz-executor014/9153 [ 45.065729] [ 45.067371] CPU: 0 PID: 9153 Comm: syz-executor014 Not tainted 4.19.185-syzkaller #0 [ 45.075286] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.084651] Call Trace: [ 45.087252] dump_stack+0x1fc/0x2ef executing program executing program [ 45.090899] print_address_description.cold+0x54/0x219 [ 45.096198] kasan_report_error.cold+0x8a/0x1b9 [ 45.100889] ? vgem_gem_dumb_create+0x22c/0x240 [ 45.105578] __asan_report_load8_noabort+0x88/0x90 [ 45.110538] ? drm_gem_object_put_unlocked+0x50/0x180 [ 45.115754] ? vgem_gem_dumb_create+0x22c/0x240 [ 45.120452] vgem_gem_dumb_create+0x22c/0x240 [ 45.124975] drm_mode_create_dumb+0x27c/0x300 [ 45.129494] drm_ioctl_kernel+0x208/0x2a0 [ 45.133699] ? drm_mode_create_dumb+0x300/0x300 [ 45.138396] ? drm_ioctl_permit+0x210/0x210 [ 45.142739] ? __might_fault+0x192/0x1d0 [ 45.146828] drm_ioctl+0x507/0x9c0 [ 45.150406] ? drm_mode_create_dumb+0x300/0x300 [ 45.155099] ? drm_getstats+0x20/0x20 [ 45.158927] ? lock_downgrade+0x720/0x720 [ 45.163149] ? lock_acquire+0x170/0x3c0 [ 45.167145] ? finish_task_switch+0x118/0x760 [ 45.171669] ? _raw_spin_unlock_irq+0x24/0x80 [ 45.176186] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.180785] ? drm_getstats+0x20/0x20 [ 45.184603] do_vfs_ioctl+0xcdb/0x12e0 [ 45.188506] ? lock_downgrade+0x720/0x720 [ 45.192670] ? check_preemption_disabled+0x41/0x280 [ 45.197701] ? ioctl_preallocate+0x200/0x200 [ 45.202128] ? __fget+0x356/0x510 [ 45.205600] ? do_dup2+0x450/0x450 [ 45.209167] ksys_ioctl+0x9b/0xc0 [ 45.212638] __x64_sys_ioctl+0x6f/0xb0 [ 45.216539] do_syscall_64+0xf9/0x620 [ 45.220368] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.225576] RIP: 0033:0x454619 [ 45.228778] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 18 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 45.247694] RSP: 002b:00007f68f9491308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.255437] RAX: ffffffffffffffda RBX: 00000000004ce4c8 RCX: 0000000000454619 [ 45.262718] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000004 [ 45.270098] RBP: 00000000004ce4c0 R08: 0000000000000000 R09: 0000000000000000 [ 45.278173] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ce4cc [ 45.285454] R13: 000000000049d280 R14: 6972642f7665642f R15: 0000000000022000 [ 45.292746] [ 45.294379] Allocated by task 9153: [ 45.298046] kmem_cache_alloc_trace+0x12f/0x380 [ 45.302735] __vgem_gem_create+0x44/0xf0 [ 45.306824] vgem_gem_dumb_create+0xcf/0x240 [ 45.311252] drm_mode_create_dumb+0x27c/0x300 [ 45.315776] drm_ioctl_kernel+0x208/0x2a0 [ 45.319931] drm_ioctl+0x507/0x9c0 [ 45.323487] do_vfs_ioctl+0xcdb/0x12e0 [ 45.327387] ksys_ioctl+0x9b/0xc0 [ 45.330853] __x64_sys_ioctl+0x6f/0xb0 [ 45.334751] do_syscall_64+0xf9/0x620 [ 45.338563] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.343752] [ 45.345382] Freed by task 9153: [ 45.348665] kfree+0xcc/0x210 [ 45.351782] drm_gem_object_free+0x91/0x1c0 [ 45.356377] drm_gem_object_put_unlocked+0xd1/0x180 [ 45.361410] vgem_gem_dumb_create+0x10c/0x240 [ 45.365918] drm_mode_create_dumb+0x27c/0x300 [ 45.370432] drm_ioctl_kernel+0x208/0x2a0 [ 45.374585] drm_ioctl+0x507/0x9c0 [ 45.378129] do_vfs_ioctl+0xcdb/0x12e0 [ 45.382028] ksys_ioctl+0x9b/0xc0 [ 45.385488] __x64_sys_ioctl+0x6f/0xb0 [ 45.389382] do_syscall_64+0xf9/0x620 [ 45.393193] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.398374] [ 45.400022] The buggy address belongs to the object at ffff8880a88937c0 [ 45.400022] which belongs to the cache kmalloc-512 of size 512 [ 45.412715] The buggy address is located 256 bytes inside of [ 45.412715] 512-byte region [ffff8880a88937c0, ffff8880a88939c0) [ 45.424707] The buggy address belongs to the page: [ 45.429658] page:ffffea0002a224c0 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 45.437825] flags: 0xfff00000000100(slab) [ 45.442004] raw: 00fff00000000100 ffffea00023e4c48 ffffea0002a09048 ffff88813bff0940 [ 45.450096] raw: 0000000000000000 ffff8880a8893040 0000000100000006 0000000000000000 [ 45.457975] page dumped because: kasan: bad access detected [ 45.463703] [ 45.465327] Memory state around the buggy address: [ 45.470264] ffff8880a8893780: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 45.477646] ffff8880a8893800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.485013] >ffff8880a8893880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.492380] ^ [ 45.497842] ffff8880a8893900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.505410] ffff8880a8893980: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 45.512769] ================================================================== [ 45.520215] Disabling lock debugging due to kernel taint [ 45.530036] Kernel panic - not syncing: panic_on_warn set ... [ 45.530036] [ 45.537445] CPU: 1 PID: 9153 Comm: syz-executor014 Tainted: G B 4.19.185-syzkaller #0 [ 45.546719] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.556085] Call Trace: [ 45.558686] dump_stack+0x1fc/0x2ef [ 45.562331] panic+0x26a/0x50e [ 45.565539] ? __warn_printk+0xf3/0xf3 [ 45.569461] ? preempt_schedule_common+0x45/0xc0 [ 45.574235] ? ___preempt_schedule+0x16/0x18 [ 45.578660] ? trace_hardirqs_on+0x55/0x210 [ 45.583003] kasan_end_report+0x43/0x49 [ 45.586995] kasan_report_error.cold+0xa7/0x1b9 [ 45.591705] ? vgem_gem_dumb_create+0x22c/0x240 [ 45.596391] __asan_report_load8_noabort+0x88/0x90 [ 45.601336] ? drm_gem_object_put_unlocked+0x50/0x180 [ 45.606541] ? vgem_gem_dumb_create+0x22c/0x240 [ 45.611219] vgem_gem_dumb_create+0x22c/0x240 [ 45.615752] drm_mode_create_dumb+0x27c/0x300 [ 45.620263] drm_ioctl_kernel+0x208/0x2a0 [ 45.624438] ? drm_mode_create_dumb+0x300/0x300 [ 45.629112] ? drm_ioctl_permit+0x210/0x210 [ 45.633442] ? __might_fault+0x192/0x1d0 [ 45.637512] drm_ioctl+0x507/0x9c0 [ 45.641064] ? drm_mode_create_dumb+0x300/0x300 [ 45.645774] ? drm_getstats+0x20/0x20 [ 45.649587] ? lock_downgrade+0x720/0x720 [ 45.653750] ? lock_acquire+0x170/0x3c0 [ 45.657737] ? finish_task_switch+0x118/0x760 [ 45.662243] ? _raw_spin_unlock_irq+0x24/0x80 [ 45.666754] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 45.671378] ? drm_getstats+0x20/0x20 [ 45.675192] do_vfs_ioctl+0xcdb/0x12e0 [ 45.679093] ? lock_downgrade+0x720/0x720 [ 45.683255] ? check_preemption_disabled+0x41/0x280 [ 45.688279] ? ioctl_preallocate+0x200/0x200 [ 45.692698] ? __fget+0x356/0x510 [ 45.696157] ? do_dup2+0x450/0x450 [ 45.699712] ksys_ioctl+0x9b/0xc0 [ 45.703177] __x64_sys_ioctl+0x6f/0xb0 [ 45.707074] do_syscall_64+0xf9/0x620 [ 45.710893] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.716111] RIP: 0033:0x454619 [ 45.719312] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 18 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 45.738221] RSP: 002b:00007f68f9491308 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.745936] RAX: ffffffffffffffda RBX: 00000000004ce4c8 RCX: 0000000000454619 [ 45.753214] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000004 [ 45.760489] RBP: 00000000004ce4c0 R08: 0000000000000000 R09: 0000000000000000 [ 45.767766] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ce4cc [ 45.775039] R13: 000000000049d280 R14: 6972642f7665642f R15: 0000000000022000 [ 45.782846] Kernel Offset: disabled [ 45.786505] Rebooting in 86400 seconds..