[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 84.676791][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 84.676806][ T27] audit: type=1400 audit(1565705436.481:35): avc: denied { map } for pid=10948 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 [ 469.983266][ T27] audit: type=1400 audit(1565705821.791:36): avc: denied { map } for pid=10956 comm="sh" path="/bin/dash" dev="sda1" ino=1473 scontext=system_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. [ 781.524642][ T27] audit: type=1400 audit(1565706133.331:37): avc: denied { map } for pid=10963 comm="syz-executor618" path="/root/syz-executor618496856" 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 [ 781.583881][T10970] IPVS: ftp: loaded support on port[0] = 21 [ 781.584025][T10973] IPVS: ftp: loaded support on port[0] = 21 [ 781.592816][T10974] IPVS: ftp: loaded support on port[0] = 21 [ 781.597703][T10971] IPVS: ftp: loaded support on port[0] = 21 [ 781.609292][T10972] IPVS: ftp: loaded support on port[0] = 21 [ 781.609973][T10975] IPVS: ftp: loaded support on port[0] = 21 [ 781.743740][ T27] audit: type=1400 audit(1565706133.551:38): avc: denied { associate } for pid=10975 comm="syz-executor618" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 935.180690][ T1056] INFO: task syz-executor618:11199 blocked for more than 143 seconds. [ 935.189106][ T1056] Not tainted 5.3.0-rc4 #100 [ 935.194276][ T1056] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 935.202993][ T1056] syz-executor618 D26368 11199 10972 0x80000000 [ 935.209336][ T1056] Call Trace: [ 935.212766][ T1056] __schedule+0x755/0x1580 [ 935.217261][ T1056] ? __sched_text_start+0x8/0x8 [ 935.222163][ T1056] schedule+0xa8/0x270 [ 935.226341][ T1056] schedule_timeout+0x717/0xc50 [ 935.231237][ T1056] ? percpu_ref_exit+0xd0/0xd0 [ 935.236022][ T1056] ? usleep_range+0x170/0x170 [ 935.240754][ T1056] ? __kasan_check_write+0x14/0x20 [ 935.245879][ T1056] ? lock_downgrade+0x920/0x920 [ 935.250763][ T1056] ? rwlock_bug.part.0+0x90/0x90 [ 935.255712][ T1056] ? wait_for_completion+0x9e/0x440 [ 935.260958][ T1056] ? trace_hardirqs_on+0x67/0x240 [ 935.266154][ T1056] ? __kasan_check_read+0x11/0x20 [ 935.271245][ T1056] wait_for_completion+0x29c/0x440 [ 935.276515][ T1056] ? wait_for_completion_interruptible+0x470/0x470 [ 935.283219][ T1056] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 935.289056][ T1056] ? wake_up_q+0xf0/0xf0 [ 935.293339][ T1056] ? kill_ioctx+0x1e4/0x2d0 [ 935.297852][ T1056] exit_aio+0x321/0x3a0 [ 935.302068][ T1056] ? ioctx_alloc+0x1dc0/0x1dc0 [ 935.307160][ T1056] ? mutex_unlock+0xd/0x10 [ 935.311623][ T1056] mmput+0xcf/0x4d0 [ 935.315460][ T1056] do_exit+0x84e/0x2e50 [ 935.319623][ T1056] ? mm_update_next_owner+0x640/0x640 [ 935.325035][ T1056] ? down_read_non_owner+0x450/0x450 [ 935.330343][ T1056] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 935.336671][ T1056] ? handle_mm_fault+0x1d3/0x6b0 [ 935.341649][ T1056] do_group_exit+0x135/0x360 [ 935.346429][ T1056] __x64_sys_exit_group+0x44/0x50 [ 935.351544][ T1056] do_syscall_64+0xfd/0x6a0 [ 935.356058][ T1056] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 935.362130][ T1056] RIP: 0033:0x440808 [ 935.366036][ T1056] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 935.385732][ T1056] RSP: 002b:00007ffd975ec598 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 935.394188][ T1056] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440808 [ 935.402204][ T1056] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 935.410286][ T1056] RBP: 00000000004c0f10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 935.418346][ T1056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 935.426439][ T1056] R13: 00000000006d3180 R14: 0000000000000000 R15: 0000000000000000 [ 935.434497][ T1056] INFO: task syz-executor618:11326 blocked for more than 143 seconds. [ 935.442802][ T1056] Not tainted 5.3.0-rc4 #100 [ 935.448015][ T1056] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 935.456718][ T1056] syz-executor618 D26704 11326 10973 0x80000000 [ 935.463145][ T1056] Call Trace: [ 935.466434][ T1056] __schedule+0x755/0x1580 [ 935.470882][ T1056] ? __sched_text_start+0x8/0x8 [ 935.475756][ T1056] schedule+0xa8/0x270 [ 935.479849][ T1056] schedule_timeout+0x717/0xc50 [ 935.484739][ T1056] ? percpu_ref_exit+0xd0/0xd0 [ 935.489591][ T1056] ? usleep_range+0x170/0x170 [ 935.494395][ T1056] ? __kasan_check_write+0x14/0x20 [ 935.499523][ T1056] ? lock_downgrade+0x920/0x920 [ 935.504409][ T1056] ? rwlock_bug.part.0+0x90/0x90 [ 935.509378][ T1056] ? wait_for_completion+0x9e/0x440 [ 935.514755][ T1056] ? trace_hardirqs_on+0x67/0x240 [ 935.519800][ T1056] ? __kasan_check_read+0x11/0x20 [ 935.524888][ T1056] wait_for_completion+0x29c/0x440 [ 935.530017][ T1056] ? wait_for_completion_interruptible+0x470/0x470 [ 935.536560][ T1056] ? _raw_spin_unlock_irqrestore+0xa4/0xe0 [ 935.542443][ T1056] ? wake_up_q+0xf0/0xf0 [ 935.546755][ T1056] ? kill_ioctx+0x1e4/0x2d0 [ 935.551286][ T1056] exit_aio+0x321/0x3a0 [ 935.555439][ T1056] ? ioctx_alloc+0x1dc0/0x1dc0 [ 935.560196][ T1056] ? mutex_unlock+0xd/0x10 [ 935.564767][ T1056] mmput+0xcf/0x4d0 [ 935.568589][ T1056] do_exit+0x84e/0x2e50 [ 935.572904][ T1056] ? mm_update_next_owner+0x640/0x640 [ 935.578336][ T1056] ? down_read_non_owner+0x450/0x450 [ 935.583692][ T1056] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 935.589945][ T1056] ? handle_mm_fault+0x1d3/0x6b0 [ 935.594950][ T1056] do_group_exit+0x135/0x360 [ 935.599551][ T1056] __x64_sys_exit_group+0x44/0x50 [ 935.604642][ T1056] do_syscall_64+0xfd/0x6a0 [ 935.609161][ T1056] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 935.615383][ T1056] RIP: 0033:0x440808 [ 935.619325][ T1056] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 935.638981][ T1056] RSP: 002b:00007ffd975ec598 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 935.647443][ T1056] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440808 [ 935.655815][ T1056] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 935.663896][ T1056] RBP: 00000000004c0f10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 935.671898][ T1056] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 935.679870][ T1056] R13: 00000000006d3180 R14: 0000000000000000 R15: 0000000000000000 [ 935.687943][ T1056] INFO: lockdep is turned off. [ 935.692913][ T1056] NMI backtrace for cpu 0 [ 935.697291][ T1056] CPU: 0 PID: 1056 Comm: khungtaskd Not tainted 5.3.0-rc4 #100 [ 935.704891][ T1056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 935.714942][ T1056] Call Trace: [ 935.718284][ T1056] dump_stack+0x172/0x1f0 [ 935.722605][ T1056] nmi_cpu_backtrace.cold+0x70/0xb2 [ 935.727792][ T1056] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 935.734204][ T1056] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 935.739918][ T1056] nmi_trigger_cpumask_backtrace+0x23b/0x28b [ 935.745901][ T1056] arch_trigger_cpumask_backtrace+0x14/0x20 [ 935.751802][ T1056] watchdog+0x9d0/0xef0 [ 935.755957][ T1056] kthread+0x361/0x430 [ 935.760019][ T1056] ? reset_hung_task_detector+0x30/0x30 [ 935.765550][ T1056] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 935.771778][ T1056] ret_from_fork+0x24/0x30 [ 935.776393][ T1056] Sending NMI from CPU 0 to CPUs 1: [ 935.782336][ C1] NMI backtrace for cpu 1 [ 935.782343][ C1] CPU: 1 PID: 14860 Comm: syz-executor618 Not tainted 5.3.0-rc4 #100 [ 935.782349][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 935.782353][ C1] RIP: 0010:check_memory_region+0x123/0x1a0 [ 935.782364][ C1] Code: 49 89 d9 49 29 c1 e9 68 ff ff ff 5b b8 01 00 00 00 41 5c 41 5d 5d c3 4d 85 c9 74 ef 4d 01 e1 eb 09 48 83 c0 01 4c 39 c8 74 e1 <80> 38 00 74 f2 eb 8c 4d 39 c2 74 4d e8 7c e4 ff ff 31 c0 5b 41 5c [ 935.782368][ C1] RSP: 0018:ffff8880a908f7a8 EFLAGS: 00000096 [ 935.782377][ C1] RAX: fffffbfff134ae4f RBX: fffffbfff134ae50 RCX: ffffffff8158b781 [ 935.782382][ C1] RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff89a57278 [ 935.782387][ C1] RBP: ffff8880a908f7c0 R08: 1ffffffff134ae4f R09: fffffbfff134ae50 [ 935.782392][ C1] R10: fffffbfff134ae4f R11: ffffffff89a5727f R12: fffffbfff134ae4f [ 935.782397][ C1] R13: ffffffff833e5b7a R14: ffff8880a908f888 R15: 0000000000000001 [ 935.782402][ C1] FS: 0000555557191880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 935.782407][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 935.782412][ C1] CR2: ffffffffff600400 CR3: 000000008ff1c000 CR4: 00000000001406e0 [ 935.782415][ C1] Call Trace: [ 935.782419][ C1] ? debug_check_no_obj_freed+0x20a/0x43f [ 935.782422][ C1] __kasan_check_read+0x11/0x20 [ 935.782426][ C1] lock_release+0x1a1/0x960 [ 935.782429][ C1] ? __kasan_check_write+0x14/0x20 [ 935.782433][ C1] ? lock_downgrade+0x920/0x920 [ 935.782436][ C1] ? rwlock_bug.part.0+0x90/0x90 [ 935.782440][ C1] ? lock_acquire+0x190/0x410 [ 935.782444][ C1] ? debug_check_no_obj_freed+0xc0/0x43f [ 935.782448][ C1] _raw_spin_unlock_irqrestore+0x1f/0xe0 [ 935.782452][ C1] debug_check_no_obj_freed+0x20a/0x43f [ 935.782455][ C1] __free_pages_ok+0x26c/0xf40 [ 935.782459][ C1] free_compound_page+0x92/0xd0 [ 935.782462][ C1] free_transhuge_page+0x230/0x310 [ 935.782466][ C1] __put_compound_page+0x90/0xd0 [ 935.782469][ C1] release_pages+0x5e5/0x1a50 [ 935.782473][ C1] ? lru_deactivate_file_fn+0x1b30/0x1b30 [ 935.782478][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 935.782481][ C1] ? lru_add_drain_cpu+0x1c4/0x520 [ 935.782485][ C1] free_pages_and_swap_cache+0x2c3/0x3f0 [ 935.782488][ C1] tlb_flush_mmu+0x89/0x630 [ 935.782492][ C1] tlb_finish_mmu+0x98/0x3b0 [ 935.782495][ C1] exit_mmap+0x2da/0x530 [ 935.782499][ C1] ? __ia32_sys_munmap+0x80/0x80 [ 935.782503][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 935.782507][ C1] ? __khugepaged_exit+0xcf/0x410 [ 935.782510][ C1] mmput+0x179/0x4d0 [ 935.782513][ C1] do_exit+0x84e/0x2e50 [ 935.782517][ C1] ? mm_update_next_owner+0x640/0x640 [ 935.782520][ C1] ? down_read_non_owner+0x450/0x450 [ 935.782525][ C1] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 935.782528][ C1] ? handle_mm_fault+0x1d3/0x6b0 [ 935.782532][ C1] do_group_exit+0x135/0x360 [ 935.782535][ C1] __x64_sys_exit_group+0x44/0x50 [ 935.782539][ C1] do_syscall_64+0xfd/0x6a0 [ 935.782543][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 935.782546][ C1] RIP: 0033:0x440808 [ 935.782557][ C1] Code: 00 00 be 3c 00 00 00 eb 19 66 0f 1f 84 00 00 00 00 00 48 89 d7 89 f0 0f 05 48 3d 00 f0 ff ff 77 21 f4 48 89 d7 44 89 c0 0f 05 <48> 3d 00 f0 ff ff 76 e0 f7 d8 64 41 89 01 eb d8 0f 1f 84 00 00 00 [ 935.782561][ C1] RSP: 002b:00007ffd975ec598 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 935.782570][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440808 [ 935.782575][ C1] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 935.782581][ C1] RBP: 00000000004c0f10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 935.782586][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 935.782591][ C1] R13: 00000000006d3180 R14: 0000000000000000 R15: 0000000000000000 [ 935.782827][ T1056] Kernel panic - not syncing: hung_task: blocked tasks [ 936.159590][ T1056] CPU: 0 PID: 1056 Comm: khungtaskd Not tainted 5.3.0-rc4 #100 [ 936.167128][ T1056] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 936.177184][ T1056] Call Trace: [ 936.180484][ T1056] dump_stack+0x172/0x1f0 [ 936.184817][ T1056] panic+0x2dc/0x755 [ 936.188710][ T1056] ? add_taint.cold+0x16/0x16 [ 936.193387][ T1056] ? lapic_can_unplug_cpu.cold+0x45/0x45 [ 936.199022][ T1056] ? ___preempt_schedule+0x16/0x20 [ 936.204132][ T1056] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 936.210292][ T1056] ? nmi_trigger_cpumask_backtrace+0x24c/0x28b [ 936.216467][ T1056] ? nmi_trigger_cpumask_backtrace+0x256/0x28b [ 936.222706][ T1056] ? nmi_trigger_cpumask_backtrace+0x21b/0x28b [ 936.228949][ T1056] watchdog+0x9e1/0xef0 [ 936.233115][ T1056] kthread+0x361/0x430 [ 936.237186][ T1056] ? reset_hung_task_detector+0x30/0x30 [ 936.242734][ T1056] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 936.248986][ T1056] ret_from_fork+0x24/0x30 [ 936.254460][ T1056] Kernel Offset: disabled [ 936.258793][ T1056] Rebooting in 86400 seconds..