[ 36.891399][ T26] audit: type=1800 audit(1550261210.484:26): pid=7616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.920173][ T26] audit: type=1800 audit(1550261210.484:27): pid=7616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.940927][ T26] audit: type=1800 audit(1550261210.484:28): pid=7616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 37.730935][ T26] audit: type=1800 audit(1550261211.354:29): pid=7616 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.5' (ECDSA) to the list of known hosts. syzkaller login: [ 46.353548][ T7779] IPVS: ftp: loaded support on port[0] = 21 [ 46.353555][ T7775] IPVS: ftp: loaded support on port[0] = 21 [ 46.373034][ T7777] IPVS: ftp: loaded support on port[0] = 21 [ 46.377765][ T7776] IPVS: ftp: loaded support on port[0] = 21 [ 46.389974][ T7778] IPVS: ftp: loaded support on port[0] = 21 [ 46.400515][ T7774] IPVS: ftp: loaded support on port[0] = 21 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 [ 48.702027][ T8183] cgroup: fork rejected by pids controller in /syz0 executing program executing program executing program [ 48.977830][ T8196] cgroup: fork rejected by pids controller in /syz1 executing program [ 49.045739][ T8182] cgroup: fork rejected by pids controller in /syz3 [ 49.057723][ T8205] cgroup: fork rejected by pids controller in /syz5 executing program [ 49.184874][ T8181] ================================================================== [ 49.193071][ T8181] BUG: KASAN: use-after-free in uprobe_perf_close+0x39d/0x490 [ 49.200507][ T8181] Read of size 4 at addr ffff8880747e4324 by task syz-executor556/8181 [ 49.208729][ T8181] [ 49.211045][ T8181] CPU: 1 PID: 8181 Comm: syz-executor556 Not tainted 5.0.0-rc6-next-20190215 #36 [ 49.220275][ T8181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.230321][ T8181] Call Trace: [ 49.233607][ T8181] dump_stack+0x172/0x1f0 [ 49.237926][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.243064][ T8181] print_address_description.cold+0x7c/0x20d [ 49.249047][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.254159][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.259260][ T8181] kasan_report.cold+0x1b/0x40 [ 49.264001][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.269094][ T8181] __asan_report_load4_noabort+0x14/0x20 [ 49.274701][ T8181] uprobe_perf_close+0x39d/0x490 [ 49.279616][ T8181] ? perf_addr_filters_splice+0x11b/0x5a0 [ 49.285314][ T8181] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.291547][ T8181] trace_uprobe_register+0x246/0x960 [ 49.296846][ T8181] ? perf_uprobe_init+0x290/0x290 [ 49.301858][ T8181] perf_uprobe_destroy+0xa0/0x130 [ 49.306870][ T8181] ? perf_uprobe_init+0x290/0x290 [ 49.311875][ T8181] _free_event+0x356/0x13b0 [ 49.317603][ T8181] ? kasan_check_write+0x14/0x20 [ 49.322549][ T8181] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 49.328115][ T8181] ? ring_buffer_attach+0x650/0x650 executing program [ 49.333304][ T8181] ? wait_for_completion+0x440/0x440 [ 49.338571][ T8181] free_event+0x5f/0xd0 [ 49.342725][ T8181] perf_event_release_kernel+0x5b2/0xbe0 [ 49.347422][ T8214] cgroup: fork rejected by pids controller in /syz2 [ 49.348361][ T8181] ? put_event+0x60/0x60 [ 49.348388][ T8181] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 49.348406][ T8181] ? perf_event_release_kernel+0xbe0/0xbe0 [ 49.348420][ T8181] perf_release+0x37/0x50 [ 49.348438][ T8181] __fput+0x2e5/0x8d0 [ 49.379709][ T8181] ____fput+0x16/0x20 [ 49.383685][ T8181] task_work_run+0x14a/0x1c0 [ 49.388264][ T8181] exit_to_usermode_loop+0x273/0x2c0 [ 49.393541][ T8181] do_syscall_64+0x52d/0x610 [ 49.398145][ T8181] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.404040][ T8181] RIP: 0033:0x4060c1 [ 49.407957][ T8181] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 49.427592][ T8181] RSP: 002b:00007fffc71282c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 49.435987][ T8181] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004060c1 [ 49.443957][ T8181] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 49.451965][ T8181] RBP: 00000000006dcc2c R08: 0000000000000000 R09: 0000000000000000 [ 49.459927][ T8181] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dcc40 [ 49.467889][ T8181] R13: 0000000000000000 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 49.475885][ T8181] [ 49.478218][ T8181] Allocated by task 8182: [ 49.482544][ T8181] save_stack+0x45/0xd0 [ 49.486711][ T8181] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 49.492332][ T8181] kasan_slab_alloc+0xf/0x20 [ 49.496926][ T8181] kmem_cache_alloc_node+0x144/0x710 [ 49.502205][ T8181] copy_process.part.0+0x1d35/0x79e0 [ 49.507482][ T8181] _do_fork+0x257/0xfd0 [ 49.511627][ T8181] __x64_sys_clone+0xbf/0x150 [ 49.516302][ T8181] do_syscall_64+0x103/0x610 [ 49.520911][ T8181] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.526784][ T8181] [ 49.529105][ T8181] Freed by task 8182: [ 49.533087][ T8181] save_stack+0x45/0xd0 [ 49.537240][ T8181] __kasan_slab_free+0x102/0x150 [ 49.542173][ T8181] kasan_slab_free+0xe/0x10 [ 49.546681][ T8181] kmem_cache_free+0x86/0x260 [ 49.551349][ T8181] free_task+0xdd/0x120 [ 49.555501][ T8181] copy_process.part.0+0x1a67/0x79e0 [ 49.560776][ T8181] _do_fork+0x257/0xfd0 [ 49.564938][ T8181] __x64_sys_clone+0xbf/0x150 [ 49.569614][ T8181] do_syscall_64+0x103/0x610 [ 49.574199][ T8181] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.580081][ T8181] [ 49.582402][ T8181] The buggy address belongs to the object at ffff8880747e4300 [ 49.582402][ T8181] which belongs to the cache task_struct(23:syz3) of size 6080 [ 49.597312][ T8181] The buggy address is located 36 bytes inside of [ 49.597312][ T8181] 6080-byte region [ffff8880747e4300, ffff8880747e5ac0) [ 49.610565][ T8181] The buggy address belongs to the page: [ 49.616220][ T8181] page:ffffea0001d1f900 count:1 mapcount:0 mapping:ffff88808330ce40 index:0x0 compound_mapcount: 0 [ 49.626885][ T8181] flags: 0x1fffc0000010200(slab|head) [ 49.632260][ T8181] raw: 01fffc0000010200 ffffea0001c77488 ffff8880a32ba348 ffff88808330ce40 [ 49.640844][ T8181] raw: 0000000000000000 ffff8880747e4300 0000000100000001 ffff888031ed2300 [ 49.649418][ T8181] page dumped because: kasan: bad access detected [ 49.655927][ T8181] page->mem_cgroup:ffff888031ed2300 [ 49.661130][ T8181] [ 49.663445][ T8181] Memory state around the buggy address: [ 49.669090][ T8181] ffff8880747e4200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.677162][ T8181] ffff8880747e4280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.685219][ T8181] >ffff8880747e4300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.693284][ T8181] ^ [ 49.698390][ T8181] ffff8880747e4380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.706440][ T8181] ffff8880747e4400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.714491][ T8181] ================================================================== [ 49.722538][ T8181] Disabling lock debugging due to kernel taint [ 49.728970][ T8181] Kernel panic - not syncing: panic_on_warn set ... [ 49.732377][ T8223] cgroup: fork rejected by pids controller in /syz4 [ 49.735569][ T8181] CPU: 1 PID: 8181 Comm: syz-executor556 Tainted: G B 5.0.0-rc6-next-20190215 #36 [ 49.735583][ T8181] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.735588][ T8181] Call Trace: [ 49.735607][ T8181] dump_stack+0x172/0x1f0 [ 49.735626][ T8181] panic+0x2cb/0x65c [ 49.735640][ T8181] ? __warn_printk+0xf3/0xf3 [ 49.735658][ T8181] ? trace_hardirqs_on+0x5e/0x230 [ 49.735669][ T8181] ? trace_hardirqs_on+0x5e/0x230 [ 49.735685][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.735698][ T8181] end_report+0x47/0x4f [ 49.735711][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.735728][ T8181] kasan_report.cold+0xe/0x40 [ 49.807702][ T8181] ? uprobe_perf_close+0x39d/0x490 [ 49.812828][ T8181] __asan_report_load4_noabort+0x14/0x20 [ 49.818436][ T8181] uprobe_perf_close+0x39d/0x490 [ 49.823358][ T8181] ? perf_addr_filters_splice+0x11b/0x5a0 [ 49.829084][ T8181] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.835302][ T8181] trace_uprobe_register+0x246/0x960 [ 49.840566][ T8181] ? perf_uprobe_init+0x290/0x290 [ 49.845590][ T8181] perf_uprobe_destroy+0xa0/0x130 [ 49.850611][ T8181] ? perf_uprobe_init+0x290/0x290 [ 49.855635][ T8181] _free_event+0x356/0x13b0 [ 49.860144][ T8181] ? kasan_check_write+0x14/0x20 [ 49.865087][ T8181] ? __mutex_unlock_slowpath+0xf8/0x6b0 [ 49.870636][ T8181] ? ring_buffer_attach+0x650/0x650 [ 49.875899][ T8181] ? wait_for_completion+0x440/0x440 [ 49.881167][ T8181] free_event+0x5f/0xd0 [ 49.885306][ T8181] perf_event_release_kernel+0x5b2/0xbe0 [ 49.890918][ T8181] ? put_event+0x60/0x60 [ 49.895148][ T8181] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 49.901380][ T8181] ? perf_event_release_kernel+0xbe0/0xbe0 [ 49.907167][ T8181] perf_release+0x37/0x50 [ 49.911477][ T8181] __fput+0x2e5/0x8d0 [ 49.915469][ T8181] ____fput+0x16/0x20 [ 49.919438][ T8181] task_work_run+0x14a/0x1c0 [ 49.924029][ T8181] exit_to_usermode_loop+0x273/0x2c0 [ 49.929305][ T8181] do_syscall_64+0x52d/0x610 [ 49.933882][ T8181] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.939763][ T8181] RIP: 0033:0x4060c1 [ 49.943652][ T8181] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 b4 17 00 00 c3 48 83 ec 08 e8 6a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 b3 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 49.963275][ T8181] RSP: 002b:00007fffc71282c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 49.971668][ T8181] RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004060c1 [ 49.979624][ T8181] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 [ 49.987585][ T8181] RBP: 00000000006dcc2c R08: 0000000000000000 R09: 0000000000000000 [ 49.995545][ T8181] R10: 0000000000000000 R11: 0000000000000293 R12: 00000000006dcc40 [ 50.003542][ T8181] R13: 0000000000000000 R14: 000000000000002d R15: 20c49ba5e353f7cf [ 50.012680][ T8181] Kernel Offset: disabled [ 50.017087][ T8181] Rebooting in 86400 seconds..