[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 12.980616] random: sshd: uninitialized urandom read (32 bytes read) [ 13.246537] audit: type=1400 audit(1573982778.485:6): avc: denied { map } for pid=1760 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 [ 13.295888] random: sshd: uninitialized urandom read (32 bytes read) Debian GNU/Linux 7 syzkaller ttyS0 [ 13.873190] random: sshd: uninitialized urandom read (32 bytes read) syzkaller login: [ 14.036061] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.53' (ECDSA) to the list of known hosts. [ 19.587843] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program [ 19.683197] audit: type=1400 audit(1573982784.925:7): avc: denied { map } for pid=1772 comm="syz-executor152" path="/root/syz-executor152623172" dev="sda1" ino=16483 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.313128] ================================================================== [ 30.320626] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x169f/0x1810 [ 30.327972] Read of size 8 at addr ffff8881cd127a00 by task syz-executor152/2035 [ 30.335489] [ 30.337101] CPU: 0 PID: 2035 Comm: syz-executor152 Not tainted 4.14.154+ #0 [ 30.344181] Call Trace: [ 30.346810] dump_stack+0xe5/0x154 [ 30.350334] ? unwind_next_frame+0x169f/0x1810 [ 30.354894] ? unwind_next_frame+0x169f/0x1810 [ 30.359454] print_address_description+0x60/0x226 [ 30.364286] ? unwind_next_frame+0x169f/0x1810 [ 30.368854] ? unwind_next_frame+0x169f/0x1810 [ 30.373473] __kasan_report.cold+0x1a/0x41 [ 30.377699] ? __do_page_fault+0x620/0xbb0 [ 30.381914] ? unwind_next_frame+0x169f/0x1810 [ 30.386480] unwind_next_frame+0x169f/0x1810 [ 30.390871] ? retint_kernel+0x2d/0x2d [ 30.394736] ? deref_stack_reg+0xe0/0xe0 [ 30.398978] ? retint_kernel+0x2d/0x2d [ 30.402841] perf_callchain_kernel+0x3a0/0x540 [ 30.407412] ? arch_perf_update_userpage+0x330/0x330 [ 30.412504] ? memory_events_show+0xf0/0xf0 [ 30.416806] ? perf_callchain_kernel+0x540/0x540 [ 30.421546] get_perf_callchain+0x2f5/0x770 [ 30.425847] ? put_callchain_buffers+0x60/0x60 [ 30.430412] ? kvm_clock_read+0x1f/0x30 [ 30.434371] ? kvm_sched_clock_read+0x5/0x10 [ 30.438756] ? sched_clock+0x5/0x10 [ 30.442357] ? sched_clock_cpu+0x31/0x1c0 [ 30.446481] perf_callchain+0x147/0x190 [ 30.450456] perf_prepare_sample+0x6a8/0x1360 [ 30.455027] ? perf_output_sample+0x1700/0x1700 [ 30.459672] ? perf_event_output_forward+0x12f/0x220 [ 30.464755] ? lock_downgrade+0x630/0x630 [ 30.468900] perf_event_output_forward+0xdc/0x220 [ 30.473721] ? perf_prepare_sample+0x1360/0x1360 [ 30.478451] ? perf_event_output_forward+0x156/0x220 [ 30.483528] ? perf_prepare_sample+0x1360/0x1360 [ 30.488275] ? check_preemption_disabled+0x35/0x1f0 [ 30.493271] __perf_event_overflow+0x12d/0x340 [ 30.497839] perf_swevent_overflow+0x7a/0xf0 [ 30.502228] perf_swevent_event+0x19c/0x270 [ 30.506527] perf_tp_event+0x633/0x7f0 [ 30.510392] ? perf_swevent_put_recursion_context+0xa0/0xa0 [ 30.516091] ? perf_tp_event+0x4c1/0x7f0 [ 30.520140] ? perf_event_output_forward+0x156/0x220 [ 30.525244] ? perf_prepare_sample+0x1360/0x1360 [ 30.529988] ? check_preemption_disabled+0x35/0x1f0 [ 30.535029] ? __perf_event_overflow+0x1cc/0x340 [ 30.539794] ? perf_trace_run_bpf_submit+0x113/0x170 [ 30.544909] perf_trace_run_bpf_submit+0x113/0x170 [ 30.549825] perf_trace_lock_acquire+0x341/0x4e0 [ 30.554561] ? HARDIRQ_verbose+0x10/0x10 [ 30.558602] ? retint_kernel+0x2d/0x2d [ 30.562466] ? trace_hardirqs_on_caller+0x37b/0x540 [ 30.567462] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 30.572199] lock_acquire+0x279/0x360 [ 30.575983] ? memory_events_show+0xf0/0xf0 [ 30.580280] lock_page_memcg+0x36/0x290 [ 30.584230] ? memory_events_show+0xf0/0xf0 [ 30.588538] page_add_file_rmap+0x25/0x260 [ 30.592758] alloc_set_pte+0x42d/0xec0 [ 30.596626] filemap_map_pages+0x8e4/0xc00 [ 30.600835] ? generic_file_readonly_mmap+0x190/0x190 [ 30.606001] ? generic_file_readonly_mmap+0x190/0x190 [ 30.611166] __handle_mm_fault+0x17fc/0x2700 [ 30.615984] ? perf_trace_lock_acquire+0x341/0x4e0 [ 30.620901] ? vm_insert_mixed_mkwrite+0x30/0x30 [ 30.625688] ? HARDIRQ_verbose+0x10/0x10 [ 30.629776] ? HARDIRQ_verbose+0x10/0x10 [ 30.633820] ? check_preemption_disabled+0x35/0x1f0 [ 30.638923] ? check_preemption_disabled+0x35/0x1f0 [ 30.643967] handle_mm_fault+0x2f1/0x6da [ 30.648056] __do_page_fault+0x477/0xbb0 [ 30.652095] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 30.657434] ? bad_area_access_error+0x340/0x340 [ 30.662170] ? page_fault+0x2c/0x50 [ 30.665770] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.670589] ? page_fault+0x2c/0x50 [ 30.674206] page_fault+0x42/0x50 [ 30.677637] RIP: 6d2180: (null) [ 30.681678] RSP: 0001:00007ffcc52e2850 EFLAGS: 00000001 [ 30.681684] [ 30.688644] The buggy address belongs to the page: [ 30.693548] page:ffffea00073449c0 count:0 mapcount:0 mapping: (null) index:0x0 [ 30.701706] flags: 0x4000000000000000() [ 30.705683] raw: 4000000000000000 0000000000000000 0000000000000000 00000000ffffffff [ 30.713544] raw: 0000000000000000 ffffea00073449e0 0000000000000000 0000000000000000 [ 30.721403] page dumped because: kasan: bad access detected [ 30.727121] [ 30.728725] Memory state around the buggy address: [ 30.733633] ffff8881cd127900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.740975] ffff8881cd127980: 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 f1 04 f2 00 [ 30.748309] >ffff8881cd127a00: f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.755642] ^ [ 30.758984] ffff8881cd127a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.766315] ffff8881cd127b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.773647] ================================================================== [ 30.780980] Disabling lock debugging due to kernel taint [ 30.786402] Kernel panic - not syncing: panic_on_warn set ... [ 30.786402] [ 30.793738] CPU: 0 PID: 2035 Comm: syz-executor152 Tainted: G B 4.14.154+ #0 [ 30.802025] Call Trace: [ 30.804599] dump_stack+0xe5/0x154 [ 30.808120] panic+0x1f1/0x3da [ 30.811303] ? add_taint.cold+0x16/0x16 [ 30.815257] ? lock_downgrade+0x630/0x630 [ 30.819380] ? unwind_next_frame+0x169f/0x1810 [ 30.823950] end_report+0x43/0x49 [ 30.827378] ? unwind_next_frame+0x169f/0x1810 [ 30.831934] __kasan_report.cold+0xd/0x41 [ 30.836057] ? __do_page_fault+0x620/0xbb0 [ 30.840262] ? unwind_next_frame+0x169f/0x1810 [ 30.844820] unwind_next_frame+0x169f/0x1810 [ 30.849226] ? retint_kernel+0x2d/0x2d [ 30.853089] ? deref_stack_reg+0xe0/0xe0 [ 30.857136] ? retint_kernel+0x2d/0x2d [ 30.861019] perf_callchain_kernel+0x3a0/0x540 [ 30.865589] ? arch_perf_update_userpage+0x330/0x330 [ 30.870668] ? memory_events_show+0xf0/0xf0 [ 30.874980] ? perf_callchain_kernel+0x540/0x540 [ 30.879712] get_perf_callchain+0x2f5/0x770 [ 30.884014] ? put_callchain_buffers+0x60/0x60 [ 30.888575] ? kvm_clock_read+0x1f/0x30 [ 30.892526] ? kvm_sched_clock_read+0x5/0x10 [ 30.896927] ? sched_clock+0x5/0x10 [ 30.900541] ? sched_clock_cpu+0x31/0x1c0 [ 30.904663] perf_callchain+0x147/0x190 [ 30.908615] perf_prepare_sample+0x6a8/0x1360 [ 30.913088] ? perf_output_sample+0x1700/0x1700 [ 30.917731] ? perf_event_output_forward+0x12f/0x220 [ 30.923080] ? lock_downgrade+0x630/0x630 [ 30.927205] perf_event_output_forward+0xdc/0x220 [ 30.932035] ? perf_prepare_sample+0x1360/0x1360 [ 30.936773] ? perf_event_output_forward+0x156/0x220 [ 30.941958] ? perf_prepare_sample+0x1360/0x1360 [ 30.946691] ? check_preemption_disabled+0x35/0x1f0 [ 30.951682] __perf_event_overflow+0x12d/0x340 [ 30.956244] perf_swevent_overflow+0x7a/0xf0 [ 30.960626] perf_swevent_event+0x19c/0x270 [ 30.964924] perf_tp_event+0x633/0x7f0 [ 30.968795] ? perf_swevent_put_recursion_context+0xa0/0xa0 [ 30.974489] ? perf_tp_event+0x4c1/0x7f0 [ 30.978531] ? perf_event_output_forward+0x156/0x220 [ 30.983626] ? perf_prepare_sample+0x1360/0x1360 [ 30.988387] ? check_preemption_disabled+0x35/0x1f0 [ 30.993389] ? __perf_event_overflow+0x1cc/0x340 [ 30.998126] ? perf_trace_run_bpf_submit+0x113/0x170 [ 31.003222] perf_trace_run_bpf_submit+0x113/0x170 [ 31.008137] perf_trace_lock_acquire+0x341/0x4e0 [ 31.012902] ? HARDIRQ_verbose+0x10/0x10 [ 31.016944] ? retint_kernel+0x2d/0x2d [ 31.021000] ? trace_hardirqs_on_caller+0x37b/0x540 [ 31.025996] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.030734] lock_acquire+0x279/0x360 [ 31.034513] ? memory_events_show+0xf0/0xf0 [ 31.038810] lock_page_memcg+0x36/0x290 [ 31.042764] ? memory_events_show+0xf0/0xf0 [ 31.047062] page_add_file_rmap+0x25/0x260 [ 31.051276] alloc_set_pte+0x42d/0xec0 [ 31.055147] filemap_map_pages+0x8e4/0xc00 [ 31.059366] ? generic_file_readonly_mmap+0x190/0x190 [ 31.064530] ? generic_file_readonly_mmap+0x190/0x190 [ 31.069695] __handle_mm_fault+0x17fc/0x2700 [ 31.074082] ? perf_trace_lock_acquire+0x341/0x4e0 [ 31.078996] ? vm_insert_mixed_mkwrite+0x30/0x30 [ 31.083726] ? HARDIRQ_verbose+0x10/0x10 [ 31.087765] ? HARDIRQ_verbose+0x10/0x10 [ 31.091803] ? check_preemption_disabled+0x35/0x1f0 [ 31.096796] ? check_preemption_disabled+0x35/0x1f0 [ 31.101790] handle_mm_fault+0x2f1/0x6da [ 31.105829] __do_page_fault+0x477/0xbb0 [ 31.109870] ? entry_SYSCALL_64_after_hwframe+0x52/0xb7 [ 31.115223] ? bad_area_access_error+0x340/0x340 [ 31.119965] ? page_fault+0x2c/0x50 [ 31.123579] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.129094] ? page_fault+0x2c/0x50 [ 31.132708] page_fault+0x42/0x50 [ 31.136135] RIP: 6d2180: (null) [ 31.140185] RSP: 0001:00007ffcc52e2850 EFLAGS: 00000001 [ 31.140859] Kernel Offset: 0x28200000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 31.157146] Rebooting in 86400 seconds..