Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [ 30.017449] audit: type=1800 audit(1540604428.866:33): pid=5538 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 30.038552] audit: type=1800 audit(1540604428.876:34): pid=5538 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 33.469979] audit: type=1400 audit(1540604432.316:35): avc: denied { map } for pid=5713 comm="bash" path="/bin/bash" dev="sda1" ino=1457 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.32' (ECDSA) to the list of known hosts. executing program [ 537.749187] audit: type=1400 audit(1540604936.596:36): avc: denied { map } for pid=5728 comm="syz-executor101" path="/root/syz-executor101654331" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 702.131422] INFO: task syz-executor101:6052 blocked for more than 140 seconds. [ 702.138975] Not tainted 4.19.0+ #84 [ 702.143686] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 702.151862] syz-executor101 D23160 6052 5728 0x00000004 [ 702.157545] Call Trace: [ 702.160212] __schedule+0x8cf/0x21d0 [ 702.166860] ? __sched_text_start+0x8/0x8 [ 702.171080] ? zap_class+0x640/0x640 [ 702.175189] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 702.180292] ? print_usage_bug+0xc0/0xc0 [ 702.184641] schedule+0xfe/0x460 [ 702.188008] ? __schedule+0x21d0/0x21d0 [ 702.192221] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 702.196834] ? trace_hardirqs_on+0xbd/0x310 [ 702.201215] ? kasan_check_read+0x11/0x20 [ 702.205709] ? rwsem_down_read_failed+0x342/0x710 [ 702.210549] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.216063] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 702.221845] rwsem_down_read_failed+0x371/0x710 [ 702.226523] ? rwsem_down_write_failed_killable+0x10/0x10 [ 702.232410] ? blkg_prfill_rwstat_field_recursive+0x170/0x170 [ 702.238310] ? lock_acquire+0x1ed/0x520 [ 702.242601] ? __do_page_fault+0xbc9/0xe60 [ 702.246843] ? lock_release+0xa00/0xa00 [ 702.250856] ? perf_trace_sched_process_exec+0x860/0x860 [ 702.256624] ? kasan_check_read+0x11/0x20 [ 702.260783] ? do_raw_spin_unlock+0xa7/0x330 [ 702.265526] call_rwsem_down_read_failed+0x18/0x30 [ 702.270463] down_read+0x9b/0x120 [ 702.274169] ? __do_page_fault+0xbc9/0xe60 [ 702.278396] ? __down_interruptible+0x700/0x700 [ 702.283511] ? __close_fd+0x24c/0x3a0 [ 702.287351] ? clock_was_set_work+0x30/0x30 [ 702.291945] __do_page_fault+0xbc9/0xe60 [ 702.296007] ? trace_hardirqs_off+0xb8/0x310 [ 702.300440] ? exit_to_usermode_loop+0x1f4/0x380 [ 702.305520] do_page_fault+0xf2/0x7e0 [ 702.309316] ? vmalloc_sync_all+0x30/0x30 [ 702.313699] ? error_entry+0x70/0xd0 [ 702.317410] ? trace_hardirqs_off_caller+0xbb/0x310 [ 702.322668] ? trace_hardirqs_on_caller+0xc0/0x310 [ 702.327602] ? syscall_return_slowpath+0x5e0/0x5e0 [ 702.332895] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 702.337849] ? trace_hardirqs_on_caller+0x310/0x310 [ 702.343138] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 702.348587] ? prepare_exit_to_usermode+0x291/0x3b0 [ 702.353949] ? page_fault+0x8/0x30 [ 702.357593] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 702.362703] ? page_fault+0x8/0x30 [ 702.366243] page_fault+0x1e/0x30 [ 702.369692] RIP: 0033:0x4ab5dd [ 702.373240] Code: Bad RIP value. [ 702.376597] RSP: 002b:00007ffd251b8d60 EFLAGS: 00010202 [ 702.382186] RAX: 00000000004ab700 RBX: 0000000000000001 RCX: 00000000006e0350 [ 702.389464] RDX: 00000000004073b0 RSI: 0000000000000000 RDI: 00000000004cc9d0 [ 702.397079] RBP: 00007ffd251b8d80 R08: 000000037ffffa00 R09: 000000037ffffa00 [ 702.404591] R10: 00007ffd251b8df0 R11: 0000000000000000 R12: 0000000000000001 [ 702.412114] R13: 00000000006e0340 R14: 0000000000000008 R15: 00000000006dbd4c [ 702.419396] INFO: task syz-executor101:6053 blocked for more than 140 seconds. [ 702.427151] Not tainted 4.19.0+ #84 [ 702.431484] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 702.439563] syz-executor101 D23336 6053 5728 0x80000004 [ 702.445556] Call Trace: [ 702.448147] __schedule+0x8cf/0x21d0 [ 702.452137] ? __sched_text_start+0x8/0x8 [ 702.456284] ? zap_class+0x640/0x640 [ 702.459988] ? print_usage_bug+0xc0/0xc0 [ 702.464371] ? mark_held_locks+0x130/0x130 [ 702.468616] schedule+0xfe/0x460 [ 702.472241] ? __schedule+0x21d0/0x21d0 [ 702.476331] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 702.480904] ? trace_hardirqs_on+0xbd/0x310 [ 702.485573] ? kasan_check_read+0x11/0x20 [ 702.489718] ? rwsem_down_read_failed+0x342/0x710 [ 702.494828] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.499972] ? zap_class+0x640/0x640 [ 702.504040] rwsem_down_read_failed+0x371/0x710 [ 702.508712] ? rwsem_down_write_failed_killable+0x10/0x10 [ 702.514546] ? find_held_lock+0x36/0x1c0 [ 702.518662] ? __might_fault+0x12b/0x1e0 [ 702.523014] ? lock_acquire+0x1ed/0x520 [ 702.527052] ? do_exit+0x59c/0x26d0 [ 702.530801] ? lock_release+0xa00/0xa00 [ 702.535353] ? perf_trace_sched_process_exec+0x860/0x860 [ 702.540807] call_rwsem_down_read_failed+0x18/0x30 [ 702.546017] down_read+0x9b/0x120 [ 702.549616] ? do_exit+0x59c/0x26d0 [ 702.553505] ? __down_interruptible+0x700/0x700 [ 702.558175] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 702.563992] ? sync_mm_rss+0x9a/0x1c0 [ 702.567794] do_exit+0x59c/0x26d0 [ 702.571572] ? do_raw_spin_unlock+0xa0/0x330 [ 702.575979] ? mm_update_next_owner+0x990/0x990 [ 702.580637] ? print_usage_bug+0xc0/0xc0 [ 702.584963] ? zap_class+0x640/0x640 [ 702.588670] ? find_held_lock+0x36/0x1c0 [ 702.592962] ? __lock_acquire+0x62f/0x4c20 [ 702.597195] ? lock_downgrade+0x900/0x900 [ 702.601689] ? mark_held_locks+0x130/0x130 [ 702.605922] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 702.611174] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 702.616676] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 702.622568] ? futex_wait+0x5ec/0xa50 [ 702.626376] ? futex_wait_setup+0x3e0/0x3e0 [ 702.630689] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 702.636232] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 702.641660] ? futex_wake+0x304/0x760 [ 702.645468] ? kasan_check_read+0x11/0x20 [ 702.649608] ? zap_class+0x640/0x640 [ 702.653618] ? memset+0x31/0x40 [ 702.656901] ? find_held_lock+0x36/0x1c0 [ 702.661063] ? get_signal+0x95b/0x1980 [ 702.665319] ? _raw_spin_unlock_irq+0x27/0x80 [ 702.669859] ? _raw_spin_unlock_irq+0x27/0x80 [ 702.674628] do_group_exit+0x177/0x440 [ 702.678520] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.683852] ? __ia32_sys_exit+0x50/0x50 [ 702.687913] get_signal+0x8b0/0x1980 [ 702.691854] ? ptrace_notify+0x130/0x130 [ 702.695914] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 702.701727] ? check_preemption_disabled+0x48/0x280 [ 702.706799] ? rcu_lockdep_current_cpu_online+0x1a4/0x210 [ 702.712610] ? rcu_pm_notify+0xc0/0xc0 [ 702.716499] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 702.721792] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 702.727382] do_signal+0x9c/0x21c0 [ 702.730923] ? setup_sigcontext+0x7d0/0x7d0 [ 702.735543] ? cap_mmap_addr+0x130/0x130 [ 702.739683] ? exit_to_usermode_loop+0x8c/0x380 [ 702.744604] ? exit_to_usermode_loop+0x8c/0x380 [ 702.749276] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 702.754074] ? trace_hardirqs_on+0xbd/0x310 [ 702.758397] ? cap_capable+0x1f9/0x260 [ 702.762525] ? do_syscall_64+0x6be/0x820 [ 702.766593] ? __x64_sys_futex+0x47f/0x6a0 [ 702.770830] exit_to_usermode_loop+0x2e5/0x380 [ 702.775666] ? __bpf_trace_sys_exit+0x30/0x30 [ 702.780209] ? __sys_setresuid+0x6f3/0x820 [ 702.784653] do_syscall_64+0x6be/0x820 [ 702.788536] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 702.794178] ? syscall_return_slowpath+0x5e0/0x5e0 [ 702.799107] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 702.804335] ? trace_hardirqs_on_caller+0x310/0x310 [ 702.809355] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 702.814606] ? prepare_exit_to_usermode+0x291/0x3b0 [ 702.819623] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 702.824772] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 702.829965] RIP: 0033:0x446569 [ 702.833377] Code: 63 65 20 69 73 20 65 6d 70 74 79 2c 20 79 6f 75 20 6d 61 79 20 77 61 6e 74 20 74 6f 20 2e 2f 63 6f 6e 66 69 67 75 72 65 20 2d <2d> 65 6e 61 62 6c 65 2d 72 74 69 6e 73 74 0a 00 00 00 00 00 00 00 [ 702.852581] RSP: 002b:00007f317eab4db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 702.860296] RAX: fffffffffffffe00 RBX: 00000000006dbc48 RCX: 0000000000446569 [ 702.867877] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc48 [ 702.875372] RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 [ 702.882892] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 702.890157] R13: 00007ffd251b8d5f R14: 00007f317eab59c0 R15: 00000000006dbd4c [ 702.897685] INFO: task syz-executor101:6054 blocked for more than 140 seconds. [ 702.905253] Not tainted 4.19.0+ #84 [ 702.909394] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 702.917599] syz-executor101 D23472 6054 5728 0x80000004 [ 702.923456] Call Trace: [ 702.926046] __schedule+0x8cf/0x21d0 [ 702.929755] ? __sched_text_start+0x8/0x8 [ 702.934241] ? zap_class+0x640/0x640 [ 702.937967] ? print_usage_bug+0xc0/0xc0 [ 702.942250] ? mark_held_locks+0x130/0x130 [ 702.946497] schedule+0xfe/0x460 [ 702.949858] ? __schedule+0x21d0/0x21d0 [ 702.954105] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 702.958688] ? trace_hardirqs_on+0xbd/0x310 [ 702.963224] ? kasan_check_read+0x11/0x20 [ 702.967374] ? rwsem_down_read_failed+0x342/0x710 [ 702.972451] ? trace_hardirqs_off_caller+0x310/0x310 [ 702.977559] ? zap_class+0x640/0x640 [ 702.981563] rwsem_down_read_failed+0x371/0x710 [ 702.986231] ? rwsem_down_write_failed_killable+0x10/0x10 [ 702.992109] ? find_held_lock+0x36/0x1c0 [ 702.996180] ? __might_fault+0x12b/0x1e0 [ 703.000236] ? lock_acquire+0x1ed/0x520 [ 703.004561] ? do_exit+0x59c/0x26d0 [ 703.008189] ? lock_release+0xa00/0xa00 [ 703.012464] ? perf_trace_sched_process_exec+0x860/0x860 [ 703.017927] call_rwsem_down_read_failed+0x18/0x30 [ 703.023208] down_read+0x9b/0x120 [ 703.026660] ? do_exit+0x59c/0x26d0 [ 703.030277] ? __down_interruptible+0x700/0x700 [ 703.035412] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.040960] ? sync_mm_rss+0x9a/0x1c0 [ 703.045082] do_exit+0x59c/0x26d0 [ 703.048535] ? do_raw_spin_unlock+0xa0/0x330 [ 703.053230] ? mm_update_next_owner+0x990/0x990 [ 703.058008] ? print_usage_bug+0xc0/0xc0 [ 703.062391] ? zap_class+0x640/0x640 [ 703.066105] ? find_held_lock+0x36/0x1c0 [ 703.070162] ? __lock_acquire+0x62f/0x4c20 [ 703.074782] ? lock_downgrade+0x900/0x900 [ 703.078944] ? mark_held_locks+0x130/0x130 [ 703.083502] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 703.088693] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 703.094054] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 703.099587] ? futex_wait+0x5ec/0xa50 [ 703.103689] ? futex_wait_setup+0x3e0/0x3e0 [ 703.108082] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 703.113631] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 703.118914] ? futex_wake+0x304/0x760 [ 703.123017] ? zap_class+0x640/0x640 [ 703.126742] ? memset+0x31/0x40 [ 703.130015] ? find_held_lock+0x36/0x1c0 [ 703.134348] ? get_signal+0x95b/0x1980 [ 703.138237] ? _raw_spin_unlock_irq+0x27/0x80 [ 703.142949] ? _raw_spin_unlock_irq+0x27/0x80 [ 703.147442] do_group_exit+0x177/0x440 [ 703.151533] ? trace_hardirqs_off_caller+0x310/0x310 [ 703.156634] ? __ia32_sys_exit+0x50/0x50 [ 703.160688] get_signal+0x8b0/0x1980 [ 703.164630] ? ptrace_notify+0x130/0x130 [ 703.168699] ? ksys_dup3+0x680/0x680 [ 703.172623] do_signal+0x9c/0x21c0 [ 703.176269] ? perf_ioctl+0x6d/0x80 [ 703.179895] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.185706] ? do_vfs_ioctl+0x201/0x1720 [ 703.189770] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 703.195240] ? setup_sigcontext+0x7d0/0x7d0 [ 703.199566] ? ioctl_preallocate+0x300/0x300 [ 703.204202] ? exit_to_usermode_loop+0x8c/0x380 [ 703.208874] ? exit_to_usermode_loop+0x8c/0x380 [ 703.213813] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 703.218398] ? trace_hardirqs_on+0xbd/0x310 [ 703.222959] ? do_syscall_64+0x6be/0x820 [ 703.227067] ? __x64_sys_futex+0x47f/0x6a0 [ 703.231530] exit_to_usermode_loop+0x2e5/0x380 [ 703.236129] ? __bpf_trace_sys_exit+0x30/0x30 [ 703.240622] ? ksys_ioctl+0x81/0xd0 [ 703.244525] do_syscall_64+0x6be/0x820 [ 703.248410] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 703.253997] ? syscall_return_slowpath+0x5e0/0x5e0 [ 703.258923] ? trace_hardirqs_on_caller+0x310/0x310 [ 703.264268] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 703.269282] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 703.276206] ? __switch_to_asm+0x40/0x70 [ 703.280267] ? __switch_to_asm+0x34/0x70 [ 703.284527] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 703.289418] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 703.294897] RIP: 0033:0x446569 [ 703.298100] Code: 63 65 20 69 73 20 65 6d 70 74 79 2c 20 79 6f 75 20 6d 61 79 20 77 61 6e 74 20 74 6f 20 2e 2f 63 6f 6e 66 69 67 75 72 65 20 2d <2d> 65 6e 61 62 6c 65 2d 72 74 69 6e 73 74 0a 00 00 00 00 00 00 00 [ 703.317455] RSP: 002b:00007f317ea93db8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 703.325411] RAX: fffffffffffffe00 RBX: 00000000006dbc58 RCX: 0000000000446569 [ 703.332888] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc58 [ 703.340154] RBP: 00000000006dbc50 R08: 0000000000000000 R09: 0000000000000000 [ 703.347642] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc5c [ 703.355111] R13: 00007ffd251b8d5f R14: 00007f317ea949c0 R15: 00000000006dbd4c [ 703.362580] [ 703.362580] Showing all locks held in the system: [ 703.368901] 1 lock held by khungtaskd/982: [ 703.373352] #0: 00000000af474ed2 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 [ 703.382207] 1 lock held by rsyslogd/5576: [ 703.386344] #0: 0000000070f108bf (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 [ 703.394657] 2 locks held by getty/5698: [ 703.398624] #0: 0000000002d4342d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.407096] #1: 00000000f04525d3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.416286] 2 locks held by getty/5699: [ 703.420247] #0: 000000005f62adb0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.428688] #1: 000000003da5b534 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.437776] 2 locks held by getty/5700: [ 703.441987] #0: 000000002ed48914 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.450228] #1: 00000000c13c7a11 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.459356] 2 locks held by getty/5701: [ 703.463526] #0: 00000000d7c9e47a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.472015] #1: 00000000493c2373 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.480867] 2 locks held by getty/5702: [ 703.485087] #0: 0000000049d332d8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.493813] #1: 00000000e4cf0101 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.502899] 2 locks held by getty/5703: [ 703.506872] #0: 0000000009032093 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.515398] #1: 00000000c0758610 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.524600] 2 locks held by getty/5704: [ 703.528613] #0: 000000004c73f434 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 [ 703.537167] #1: 000000004ab0eb3b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 [ 703.546257] 1 lock held by syz-executor101/6052: [ 703.551000] #0: 00000000e10cae85 (&mm->mmap_sem){++++}, at: __do_page_fault+0xbc9/0xe60 [ 703.559498] 1 lock held by syz-executor101/6053: [ 703.564517] #0: 00000000e10cae85 (&mm->mmap_sem){++++}, at: do_exit+0x59c/0x26d0 [ 703.572432] 1 lock held by syz-executor101/6054: [ 703.577177] #0: 00000000e10cae85 (&mm->mmap_sem){++++}, at: do_exit+0x59c/0x26d0 [ 703.585210] 1 lock held by syz-executor101/6055: [ 703.589964] [ 703.591817] ============================================= [ 703.591817] [ 703.598824] NMI backtrace for cpu 1 [ 703.602503] CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0+ #84 [ 703.609390] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 703.618734] Call Trace: [ 703.621425] dump_stack+0x244/0x39d [ 703.625052] ? dump_stack_print_info.cold.1+0x20/0x20 [ 703.630242] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.635819] nmi_cpu_backtrace.cold.1+0x5c/0xa1 [ 703.640586] ? lapic_can_unplug_cpu.cold.26+0x3f/0x3f [ 703.645774] nmi_trigger_cpumask_backtrace+0x1b3/0x1ed [ 703.651054] arch_trigger_cpumask_backtrace+0x14/0x20 [ 703.656232] watchdog+0xb3e/0x1050 [ 703.659913] ? reset_hung_task_detector+0xd0/0xd0 [ 703.664809] ? __kthread_parkme+0xce/0x1a0 [ 703.669042] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 703.674137] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 703.679231] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 703.683805] ? trace_hardirqs_on+0xbd/0x310 [ 703.688123] ? kasan_check_read+0x11/0x20 [ 703.692262] ? __kthread_parkme+0xce/0x1a0 [ 703.696485] ? trace_hardirqs_off_caller+0x310/0x310 [ 703.701576] ? trace_hardirqs_off_caller+0x310/0x310 [ 703.706752] ? lockdep_init_map+0x9/0x10 [ 703.710819] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 703.715912] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 703.721441] ? __kthread_parkme+0xfb/0x1a0 [ 703.725666] kthread+0x35a/0x420 [ 703.729021] ? reset_hung_task_detector+0xd0/0xd0 [ 703.733849] ? kthread_stop+0x900/0x900 [ 703.737819] ret_from_fork+0x3a/0x50 [ 703.741602] Sending NMI from CPU 1 to CPUs 0: [ 703.746914] NMI backtrace for cpu 0 [ 703.746920] CPU: 0 PID: 6055 Comm: syz-executor101 Not tainted 4.19.0+ #84 [ 703.746948] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 703.746951] RIP: 0010:___might_sleep+0x2bc/0x340 [ 703.746975] Code: 00 48 c7 c7 80 d4 0a 88 c6 05 fd 81 99 08 01 e8 1e f1 0b 00 e9 d4 fd ff ff be ff ff ff ff 48 c7 c7 80 ae 39 89 e8 64 bf 0a 00 <85> c0 0f 84 d1 fd ff ff 48 c7 c2 00 dd 0a 88 be dd 17 00 00 48 c7 [ 703.746977] RSP: 0018:ffff8801c34b7070 EFLAGS: 00000286 [ 703.746983] RAX: 0000000000000000 RBX: ffff8801c2ea42c0 RCX: 0000000000000000 [ 703.746987] RDX: 1ffffffff1263f8e RSI: 0000000000000000 RDI: 0000000000000282 [ 703.746990] RBP: ffff8801c34b7100 R08: ffffffff819846fb R09: ffffed00385171fe [ 703.746994] R10: ffff8801c34b7500 R11: ffff8801c28b8ff7 R12: 1ffff10038696e0f [ 703.746997] R13: 0000000000000000 R14: ffffffff880b1c00 R15: 000000000000038c [ 703.747001] FS: 00007f317ea73700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 703.747004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 703.747008] CR2: ffffffffff600400 CR3: 00000001d773e000 CR4: 00000000001406f0 [ 703.747011] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 703.747015] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 703.747016] Call Trace: [ 703.747019] ? perf_trace_sched_process_exec+0x860/0x860 [ 703.747022] ? preempt_schedule_common+0x1f/0xe0 [ 703.747024] __might_sleep+0x95/0x190 [ 703.747026] ? perf_mmap+0x86b/0x1cb0 [ 703.747028] __mutex_lock+0x138/0x16f0 [ 703.747031] ? perf_mmap+0x86b/0x1cb0 [ 703.747033] ? mutex_trylock+0x2b0/0x2b0 [ 703.747035] ? find_held_lock+0x36/0x1c0 [ 703.747037] ? perf_mmap+0x858/0x1cb0 [ 703.747040] ? lock_downgrade+0x900/0x900 [ 703.747042] ? retint_kernel+0x2d/0x2d [ 703.747044] ? perf_mmap+0x858/0x1cb0 [ 703.747046] ? kasan_check_write+0x14/0x20 [ 703.747049] ? __mutex_unlock_slowpath+0x197/0x8c0 [ 703.747051] ? trace_hardirqs_on+0x310/0x310 [ 703.747054] ? wait_for_completion+0x8a0/0x8a0 [ 703.747057] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 703.747059] ? retint_kernel+0x2d/0x2d [ 703.747061] ? perf_mmap+0x97f/0x1cb0 [ 703.747063] mutex_lock_nested+0x16/0x20 [ 703.747066] ? mutex_lock_nested+0x16/0x20 [ 703.747068] perf_mmap+0x86b/0x1cb0 [ 703.747070] ? perf_release+0x50/0x50 [ 703.747072] ? find_held_lock+0x36/0x1c0 [ 703.747075] ? zap_class+0x640/0x640 [ 703.747077] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.747080] ? check_preemption_disabled+0x48/0x280 [ 703.747083] ? __lock_is_held+0xb5/0x140 [ 703.747085] ? rcu_read_lock_sched_held+0x14f/0x180 [ 703.747088] ? kmem_cache_alloc+0x33a/0x730 [ 703.747090] ? memset+0x31/0x40 [ 703.747092] ? vm_area_alloc+0x15a/0x1d0 [ 703.747095] ? arch_release_thread_stack+0x10/0x10 [ 703.747097] ? do_munmap+0x8a1/0xf50 [ 703.747099] mmap_region+0xe82/0x1cd0 [ 703.747102] ? __x64_sys_brk+0x7d0/0x7d0 [ 703.747105] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.747108] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.747110] ? creds_are_invalid+0x58/0x140 [ 703.747113] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.747116] ? inode_has_perm.isra.58+0x17a/0x210 [ 703.747118] ? mpx_unmapped_area_check+0xd8/0x108 [ 703.747121] ? selinux_file_open+0x5c0/0x5c0 [ 703.747123] ? arch_get_unmapped_area+0x750/0x750 [ 703.747126] ? lock_acquire+0x1ed/0x520 [ 703.747129] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 703.747131] ? selinux_mmap_addr+0x2d/0x110 [ 703.747134] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 703.747136] ? security_mmap_addr+0x80/0xa0 [ 703.747139] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 703.747141] ? get_unmapped_area+0x292/0x3b0 [ 703.747143] do_mmap+0xa22/0x1230 [ 703.747146] ? mmap_region+0x1cd0/0x1cd0 [ 703.747148] ? vm_mmap_pgoff+0x1b5/0x2c0 [ 703.747151] ? down_read_killable+0x150/0x150 [ 703.747153] ? security_mmap_file+0x174/0x1b0 [ 703.747155] vm_mmap_pgoff+0x213/0x2c0 [ 703.747158] ? vma_is_stack_for_current+0xd0/0xd0 [ 703.747160] ? fput+0x130/0x1a0 [ 703.747162] ksys_mmap_pgoff+0x4da/0x660 [ 703.747164] ? do_syscall_64+0x9a/0x820 [ 703.747167] ? find_mergeable_anon_vma+0xd0/0xd0 [ 703.747169] ? trace_hardirqs_on+0xbd/0x310 [ 703.747172] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 703.747175] ? trace_hardirqs_off_caller+0x310/0x310 [ 703.747177] __x64_sys_mmap+0xe9/0x1b0 [ 703.747179] do_syscall_64+0x1b9/0x820 [ 703.747182] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 703.747185] ? syscall_return_slowpath+0x5e0/0x5e0 [ 703.747187] ? trace_hardirqs_on_caller+0x310/0x310 [ 703.747190] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 703.747193] ? post_copy_siginfo_from_user.isra.25.part.26+0x250/0x250 [ 703.747195] ? __switch_to_asm+0x40/0x70 [ 703.747198] ? __switch_to_asm+0x34/0x70 [ 703.747200] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 703.747203] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 703.747205] RIP: 0033:0x446569 [ 703.747213] Code: e8 2c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 703.747215] RSP: 002b:00007f317ea72da8 EFLAGS: 00000216 ORIG_RAX: 0000000000000009 [ 703.747221] RAX: ffffffffffffffda RBX: 00000000006dbc68 RCX: 0000000000446569 [ 703.747225] RDX: 0000000000000000 RSI: 0000000000003000 RDI: 0000000020ffd000 [ 703.747233] RBP: 00000000006dbc60 R08: 0000000000000003 R09: 0000000000000000 [ 703.747237] R10: 0000000000000011 R11: 0000000000000216 R12: 00000000006dbc6c [ 703.747240] R13: 00007ffd251b8d5f R14: 00007f317ea739c0 R15: 00000000006dbd4c [ 703.755688] Kernel panic - not syncing: hung_task: blocked tasks [ 704.280663] CPU: 1 PID: 982 Comm: khungtaskd Not tainted 4.19.0+ #84 [ 704.287156] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 704.296510] Call Trace: [ 704.299118] dump_stack+0x244/0x39d [ 704.302765] ? dump_stack_print_info.cold.1+0x20/0x20 [ 704.307985] panic+0x238/0x4e7 [ 704.311188] ? add_taint.cold.5+0x16/0x16 [ 704.315356] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 704.320823] ? nmi_trigger_cpumask_backtrace+0x1c4/0x1ed [ 704.326283] ? nmi_trigger_cpumask_backtrace+0x173/0x1ed [ 704.331742] ? nmi_trigger_cpumask_backtrace+0x16a/0x1ed [ 704.337210] watchdog+0xb4f/0x1050 [ 704.340773] ? reset_hung_task_detector+0xd0/0xd0 [ 704.345634] ? __kthread_parkme+0xce/0x1a0 [ 704.349885] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 704.354997] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 704.360113] ? lockdep_hardirqs_on+0x3bb/0x5b0 [ 704.364711] ? trace_hardirqs_on+0xbd/0x310 [ 704.369041] ? kasan_check_read+0x11/0x20 [ 704.373198] ? __kthread_parkme+0xce/0x1a0 [ 704.377439] ? trace_hardirqs_off_caller+0x310/0x310 [ 704.382563] ? trace_hardirqs_off_caller+0x310/0x310 [ 704.387675] ? lockdep_init_map+0x9/0x10 [ 704.391752] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 704.396862] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 704.402409] ? __kthread_parkme+0xfb/0x1a0 [ 704.406659] kthread+0x35a/0x420 [ 704.410036] ? reset_hung_task_detector+0xd0/0xd0 [ 704.414883] ? kthread_stop+0x900/0x900 [ 704.418872] ret_from_fork+0x3a/0x50 [ 704.423899] Kernel Offset: disabled [ 704.427542] Rebooting in 86400 seconds..