Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.132' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 28.491579] WARNING: can't dereference registers at ffff88809c1e4928 for ip common_interrupt+0x93/0x93 executing program executing program executing program [ 28.543352] ================================================================== [ 28.550748] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1360/0x17d0 [ 28.558098] Read of size 8 at addr ffff8880ba407ca8 by task syz-executor959/8000 [ 28.565695] [ 28.567304] CPU: 0 PID: 8000 Comm: syz-executor959 Not tainted 4.14.229-syzkaller #0 [ 28.575158] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.584491] Call Trace: [ 28.587106] [ 28.589245] dump_stack+0x1b2/0x281 [ 28.592892] print_address_description.cold+0x54/0x1d3 [ 28.598146] kasan_report_error.cold+0x8a/0x191 [ 28.602793] ? unwind_next_frame+0x1360/0x17d0 [ 28.607350] __asan_report_load8_noabort+0x68/0x70 [ 28.612344] ? unwind_next_frame+0x1360/0x17d0 [ 28.617026] unwind_next_frame+0x1360/0x17d0 [ 28.621413] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.626762] ? deref_stack_reg+0x1a0/0x1a0 [ 28.630981] ? check_preemption_disabled+0x35/0x240 [ 28.636083] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.641426] perf_callchain_kernel+0x38c/0x520 [ 28.646006] ? arch_perf_update_userpage+0x300/0x300 [ 28.651085] ? check_preemption_disabled+0x35/0x240 [ 28.656078] get_perf_callchain+0x2de/0x740 [ 28.660376] ? put_callchain_buffers+0x60/0x60 [ 28.664934] ? __perf_event_overflow+0x1b6/0x310 [ 28.669769] ? perf_swevent_event+0x299/0x460 [ 28.674257] perf_callchain+0x147/0x190 [ 28.678224] perf_prepare_sample+0xd77/0x1380 [ 28.682698] ? perf_event_output_forward+0x143/0x1f0 [ 28.687791] ? perf_output_sample+0x16f0/0x16f0 [ 28.692439] ? perf_event_output_forward+0x143/0x1f0 [ 28.697541] perf_event_output_forward+0xc9/0x1f0 [ 28.702366] ? perf_prepare_sample+0x1380/0x1380 [ 28.707123] ? lock_acquire+0x2b8/0x3f0 [ 28.711088] ? __perf_event_overflow+0x1b6/0x310 [ 28.715926] ? check_preemption_disabled+0x35/0x240 [ 28.720917] __perf_event_overflow+0x113/0x310 [ 28.725477] perf_swevent_event+0x299/0x460 [ 28.729775] perf_tp_event+0x540/0x6e0 [ 28.733639] ? __lock_acquire+0x5fc/0x3f20 [ 28.737856] ? perf_swevent_event+0x460/0x460 [ 28.742343] ? perf_trace_run_bpf_submit+0x119/0x200 [ 28.747431] ? lock_acquire+0x2b8/0x3f0 [ 28.751399] ? HARDIRQ_verbose+0x10/0x10 [ 28.755437] ? __save_stack_trace+0x63/0x160 [ 28.759821] ? deref_stack_reg+0x124/0x1a0 [ 28.764051] ? is_bpf_text_address+0x91/0x150 [ 28.768526] ? lock_acquire+0x170/0x3f0 [ 28.772485] ? lock_downgrade+0x740/0x740 [ 28.776611] ? is_bpf_text_address+0xb8/0x150 [ 28.781118] ? kernel_text_address+0xbd/0xf0 [ 28.785503] ? __kernel_text_address+0x9/0x30 [ 28.789976] ? unwind_get_return_address+0x51/0x90 [ 28.794884] ? perf_trace_run_bpf_submit+0x119/0x200 [ 28.799979] ? check_preemption_disabled+0x35/0x240 [ 28.804971] perf_trace_run_bpf_submit+0x119/0x200 [ 28.809878] perf_trace_lock_acquire+0x332/0x510 [ 28.814611] ? __do_softirq+0x24d/0x9ff [ 28.818581] ? irq_exit+0x193/0x240 [ 28.822184] ? smp_apic_timer_interrupt+0x141/0x5e0 [ 28.827191] ? HARDIRQ_verbose+0x10/0x10 [ 28.831234] ? SyS_exit_group+0x19/0x20 [ 28.835194] ? do_syscall_64+0x1d5/0x640 [ 28.839235] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 28.844584] ? lock_downgrade+0x740/0x740 [ 28.848722] lock_acquire+0x2b8/0x3f0 [ 28.852508] ? debug_object_active_state+0xe7/0x330 [ 28.857517] _raw_spin_lock_irqsave+0x8c/0xc0 [ 28.862041] ? debug_object_active_state+0xe7/0x330 [ 28.867076] debug_object_active_state+0xe7/0x330 [ 28.871910] ? debug_object_free+0x320/0x320 [ 28.876409] ? lock_downgrade+0x740/0x740 [ 28.880540] ? rcu_process_callbacks+0x780/0x1180 [ 28.885367] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 28.890368] ? get_max_files+0x10/0x10 [ 28.894320] rcu_process_callbacks+0x82d/0x1180 [ 28.898976] ? note_gp_changes+0x2f0/0x2f0 [ 28.903205] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 28.908645] __do_softirq+0x24d/0x9ff [ 28.912432] ? check_preemption_disabled+0x35/0x240 [ 28.917426] irq_exit+0x193/0x240 [ 28.921123] smp_apic_timer_interrupt+0x141/0x5e0 [ 28.926055] apic_timer_interrupt+0x93/0xa0 [ 28.930349] [ 28.932565] RIP: 0010:kmem_cache_free+0x173/0x2b0 [ 28.937394] RSP: 0018:ffff8880a2fbfb80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 28.945881] RAX: 0000000000000007 RBX: ffff8880b5364a80 RCX: 1ffff1101677d93d [ 28.953129] RDX: 0000000000000000 RSI: ffff8880b3bec9c8 RDI: 0000000000000286 [ 28.960396] RBP: ffff88823f8301c0 R08: 0000000000000000 R09: 0000000000000000 [ 28.967642] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 [ 28.974891] R13: ffffffff81783069 R14: ffff8880b55a7ec0 R15: ffff8880b5364a90 [ 28.982150] ? unlink_anon_vmas+0x289/0x7e0 [ 28.986467] unlink_anon_vmas+0x289/0x7e0 [ 28.990605] ? up_write+0x17/0x60 [ 28.994043] free_pgtables+0x178/0x2b0 [ 28.997906] exit_mmap+0x27f/0x4d0 [ 29.001422] ? SyS_remap_file_pages+0x6a0/0x6a0 [ 29.006073] ? kmem_cache_free+0x23a/0x2b0 [ 29.010298] ? __khugepaged_exit+0x29b/0x3c0 [ 29.014773] mmput+0xfa/0x420 [ 29.017865] do_exit+0x984/0x2850 [ 29.021314] ? __do_page_fault+0x571/0xad0 [ 29.025531] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.030187] ? lock_downgrade+0x740/0x740 [ 29.034338] do_group_exit+0x100/0x2e0 [ 29.038212] SyS_exit_group+0x19/0x20 [ 29.041987] ? do_group_exit+0x2e0/0x2e0 [ 29.046026] do_syscall_64+0x1d5/0x640 [ 29.049897] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.055069] RIP: 0033:0x43eac9 [ 29.058233] RSP: 002b:00007ffd41b8eb08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.065913] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eac9 [ 29.073165] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 29.080434] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 29.087684] R10: 00000000ffffffff R11: 0000000000000246 R12: 00000000004b02f0 [ 29.094935] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.102184] [ 29.103796] The buggy address belongs to the page: [ 29.108705] page:ffffea0002e901c0 count:1 mapcount:0 mapping: (null) index:0x0 [ 29.116829] flags: 0xfff00000000800(reserved) [ 29.121303] raw: 00fff00000000800 0000000000000000 0000000000000000 00000001ffffffff [ 29.129161] raw: ffffea0002e901e0 ffffea0002e901e0 0000000000000000 0000000000000000 [ 29.137031] page dumped because: kasan: bad access detected [ 29.142720] [ 29.144326] Memory state around the buggy address: [ 29.149231] ffff8880ba407b80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.156753] ffff8880ba407c00: 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 f1 [ 29.164094] >ffff8880ba407c80: f1 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 00 00 [ 29.171428] ^ [ 29.176079] ffff8880ba407d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.183431] ffff8880ba407d80: 00 00 00 f1 f1 f1 f1 f1 f1 00 00 00 00 00 f3 f3 [ 29.190856] ================================================================== [ 29.198226] Disabling lock debugging due to kernel taint [ 29.203651] Kernel panic - not syncing: panic_on_warn set ... [ 29.203651] [ 29.211005] CPU: 0 PID: 8000 Comm: syz-executor959 Tainted: G B 4.14.229-syzkaller #0 [ 29.220078] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.229412] Call Trace: [ 29.231977] [ 29.234116] dump_stack+0x1b2/0x281 [ 29.237726] panic+0x1f9/0x42d [ 29.240895] ? add_taint.cold+0x16/0x16 [ 29.244862] ? lock_downgrade+0x740/0x740 [ 29.248988] kasan_end_report+0x43/0x49 [ 29.252957] kasan_report_error.cold+0xa7/0x191 [ 29.257604] ? unwind_next_frame+0x1360/0x17d0 [ 29.262174] __asan_report_load8_noabort+0x68/0x70 [ 29.267085] ? unwind_next_frame+0x1360/0x17d0 [ 29.271663] unwind_next_frame+0x1360/0x17d0 [ 29.276063] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.281406] ? deref_stack_reg+0x1a0/0x1a0 [ 29.285645] ? check_preemption_disabled+0x35/0x240 [ 29.290635] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.295976] perf_callchain_kernel+0x38c/0x520 [ 29.300535] ? arch_perf_update_userpage+0x300/0x300 [ 29.305621] ? check_preemption_disabled+0x35/0x240 [ 29.310617] get_perf_callchain+0x2de/0x740 [ 29.314915] ? put_callchain_buffers+0x60/0x60 [ 29.319471] ? __perf_event_overflow+0x1b6/0x310 [ 29.324201] ? perf_swevent_event+0x299/0x460 [ 29.328683] perf_callchain+0x147/0x190 [ 29.332641] perf_prepare_sample+0xd77/0x1380 [ 29.337112] ? perf_event_output_forward+0x143/0x1f0 [ 29.342191] ? perf_output_sample+0x16f0/0x16f0 [ 29.346834] ? perf_event_output_forward+0x143/0x1f0 [ 29.351912] perf_event_output_forward+0xc9/0x1f0 [ 29.356729] ? perf_prepare_sample+0x1380/0x1380 [ 29.361459] ? lock_acquire+0x2b8/0x3f0 [ 29.365408] ? __perf_event_overflow+0x1b6/0x310 [ 29.370139] ? check_preemption_disabled+0x35/0x240 [ 29.375133] __perf_event_overflow+0x113/0x310 [ 29.379691] perf_swevent_event+0x299/0x460 [ 29.383991] perf_tp_event+0x540/0x6e0 [ 29.387854] ? __lock_acquire+0x5fc/0x3f20 [ 29.392064] ? perf_swevent_event+0x460/0x460 [ 29.396548] ? perf_trace_run_bpf_submit+0x119/0x200 [ 29.401628] ? lock_acquire+0x2b8/0x3f0 [ 29.405582] ? HARDIRQ_verbose+0x10/0x10 [ 29.409640] ? __save_stack_trace+0x63/0x160 [ 29.414121] ? deref_stack_reg+0x124/0x1a0 [ 29.418330] ? is_bpf_text_address+0x91/0x150 [ 29.422801] ? lock_acquire+0x170/0x3f0 [ 29.426751] ? lock_downgrade+0x740/0x740 [ 29.430881] ? is_bpf_text_address+0xb8/0x150 [ 29.435378] ? kernel_text_address+0xbd/0xf0 [ 29.439779] ? __kernel_text_address+0x9/0x30 [ 29.444255] ? unwind_get_return_address+0x51/0x90 [ 29.449159] ? perf_trace_run_bpf_submit+0x119/0x200 [ 29.454239] ? check_preemption_disabled+0x35/0x240 [ 29.459229] perf_trace_run_bpf_submit+0x119/0x200 [ 29.464139] perf_trace_lock_acquire+0x332/0x510 [ 29.468871] ? __do_softirq+0x24d/0x9ff [ 29.472845] ? irq_exit+0x193/0x240 [ 29.476466] ? smp_apic_timer_interrupt+0x141/0x5e0 [ 29.481466] ? HARDIRQ_verbose+0x10/0x10 [ 29.485520] ? SyS_exit_group+0x19/0x20 [ 29.489469] ? do_syscall_64+0x1d5/0x640 [ 29.493508] ? entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.498852] ? lock_downgrade+0x740/0x740 [ 29.503003] lock_acquire+0x2b8/0x3f0 [ 29.506779] ? debug_object_active_state+0xe7/0x330 [ 29.511769] _raw_spin_lock_irqsave+0x8c/0xc0 [ 29.516243] ? debug_object_active_state+0xe7/0x330 [ 29.521243] debug_object_active_state+0xe7/0x330 [ 29.526076] ? debug_object_free+0x320/0x320 [ 29.530458] ? lock_downgrade+0x740/0x740 [ 29.534580] ? rcu_process_callbacks+0x780/0x1180 [ 29.539410] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 29.544410] ? get_max_files+0x10/0x10 [ 29.548632] rcu_process_callbacks+0x82d/0x1180 [ 29.553282] ? note_gp_changes+0x2f0/0x2f0 [ 29.557495] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 29.562933] __do_softirq+0x24d/0x9ff [ 29.566719] ? check_preemption_disabled+0x35/0x240 [ 29.571716] irq_exit+0x193/0x240 [ 29.575158] smp_apic_timer_interrupt+0x141/0x5e0 [ 29.579982] apic_timer_interrupt+0x93/0xa0 [ 29.584278] [ 29.586521] RIP: 0010:kmem_cache_free+0x173/0x2b0 [ 29.591334] RSP: 0018:ffff8880a2fbfb80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 [ 29.599016] RAX: 0000000000000007 RBX: ffff8880b5364a80 RCX: 1ffff1101677d93d [ 29.606262] RDX: 0000000000000000 RSI: ffff8880b3bec9c8 RDI: 0000000000000286 [ 29.613507] RBP: ffff88823f8301c0 R08: 0000000000000000 R09: 0000000000000000 [ 29.620752] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000286 [ 29.627997] R13: ffffffff81783069 R14: ffff8880b55a7ec0 R15: ffff8880b5364a90 [ 29.635253] ? unlink_anon_vmas+0x289/0x7e0 [ 29.639555] unlink_anon_vmas+0x289/0x7e0 [ 29.643678] ? up_write+0x17/0x60 [ 29.647107] free_pgtables+0x178/0x2b0 [ 29.651026] exit_mmap+0x27f/0x4d0 [ 29.654552] ? SyS_remap_file_pages+0x6a0/0x6a0 [ 29.659259] ? kmem_cache_free+0x23a/0x2b0 [ 29.663471] ? __khugepaged_exit+0x29b/0x3c0 [ 29.667853] mmput+0xfa/0x420 [ 29.670935] do_exit+0x984/0x2850 [ 29.674367] ? __do_page_fault+0x571/0xad0 [ 29.678582] ? mm_update_next_owner+0x5b0/0x5b0 [ 29.683233] ? lock_downgrade+0x740/0x740 [ 29.687369] do_group_exit+0x100/0x2e0 [ 29.691238] SyS_exit_group+0x19/0x20 [ 29.695018] ? do_group_exit+0x2e0/0x2e0 [ 29.699059] do_syscall_64+0x1d5/0x640 [ 29.702942] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 29.708106] RIP: 0033:0x43eac9 [ 29.711268] RSP: 002b:00007ffd41b8eb08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 29.718964] RAX: ffffffffffffffda RBX: 00000000004b02f0 RCX: 000000000043eac9 [ 29.726207] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 29.733459] RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 0000000000000001 [ 29.740710] R10: 00000000ffffffff R11: 0000000000000246 R12: 00000000004b02f0 [ 29.747956] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 29.755748] Kernel Offset: disabled [ 29.759357] Rebooting in 86400 seconds..