[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 80.718656][ T26] audit: type=1400 audit(1598100081.306:8): avc: denied { execmem } for pid=6835 comm="syz-executor503" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 80.740738][ T6836] ------------[ cut here ]------------ [ 80.746325][ T6836] WARNING: CPU: 0 PID: 6836 at kernel/entry/common.c:338 irqentry_exit+0x47/0x90 [ 80.755524][ T6836] Kernel panic - not syncing: panic_on_warn set ... [ 80.762086][ T6836] CPU: 0 PID: 6836 Comm: syz-executor503 Not tainted 5.9.0-rc1-syzkaller #0 [ 80.770727][ T6836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.780772][ T6836] Call Trace: [ 80.784050][ T6836] dump_stack+0x18f/0x20d [ 80.788361][ T6836] panic+0x2e3/0x75c [ 80.792255][ T6836] ? __warn_printk+0xf3/0xf3 [ 80.796833][ T6836] ? printk+0xba/0xed [ 80.800808][ T6836] ? log_store.cold+0x16/0x16 [ 80.805462][ T6836] ? no_context+0x120/0x9f0 [ 80.809942][ T6836] ? __warn.cold+0x5/0x4a [ 80.814247][ T6836] ? __warn+0xd6/0x1f2 [ 80.818308][ T6836] ? irqentry_exit+0x47/0x90 [ 80.822874][ T6836] __warn.cold+0x20/0x4a [ 80.827123][ T6836] ? irqentry_exit+0x47/0x90 [ 80.831708][ T6836] report_bug+0x1bd/0x210 [ 80.836030][ T6836] handle_bug+0x38/0x90 [ 80.840167][ T6836] exc_invalid_op+0x14/0x40 [ 80.844654][ T6836] asm_exc_invalid_op+0x12/0x20 [ 80.849493][ T6836] RIP: 0010:irqentry_exit+0x47/0x90 [ 80.854672][ T6836] Code: 27 f6 87 91 00 00 00 02 74 18 40 84 f6 75 3b 65 8b 05 4d 74 0e 78 a9 ff ff ff 7f 74 11 e9 01 7c 86 f9 40 84 f6 75 3f c3 eb 89 <0f> 0b eb ca e8 40 6a 6e f9 65 48 8b 04 25 c0 fe 01 00 48 8b 00 a8 [ 80.874253][ T6836] RSP: 0000:ffffc900017472d0 EFLAGS: 00010002 [ 80.880298][ T6836] RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff817a0007 [ 80.888248][ T6836] RDX: ffff88809f95a480 RSI: 0000000000000000 RDI: ffffc90001747308 [ 80.897960][ T6836] RBP: ffffc90001747308 R08: 0000000000000000 R09: 0000000000000000 [ 80.905909][ T6836] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 80.913855][ T6836] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 80.921901][ T6836] ? trace_hardirqs_off+0x27/0x210 [ 80.927001][ T6836] exc_page_fault+0xc2/0x160 [ 80.931577][ T6836] asm_exc_page_fault+0x1e/0x30 [ 80.936515][ T6836] RIP: 0010:__softirqentry_text_end+0x39/0x55 [ 80.942574][ T6836] Code: de 04 e0 ff ba f2 ff ff ff 31 c9 e9 db 35 d3 ff 41 bf f2 ff ff ff 31 c0 e9 1a 34 e1 f8 41 bf f2 ff ff ff 31 ed e9 35 34 e1 f8 <41> be f2 ff ff ff 48 31 c0 e9 42 37 e1 f8 41 be f2 ff ff ff 48 31 [ 80.962262][ T6836] RSP: 0000:ffffc900017473b0 EFLAGS: 00010046 [ 80.968682][ T6836] RAX: 0000000000000000 RBX: ffffc90001747470 RCX: ffffffff81014192 [ 80.976669][ T6836] RDX: ffff88809f95a480 RSI: ffffffff810141a0 RDI: 0000000000000006 [ 80.984717][ T6836] RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88809f95a487 [ 80.992684][ T6836] R10: 0000000000000000 R11: 0000000000000001 R12: ffffc9000174747c [ 81.000631][ T6836] R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88809f95a480 [ 81.008626][ T6836] ? perf_callchain_user+0x7f2/0xba0 [ 81.013921][ T6836] ? perf_callchain_user+0x800/0xba0 [ 81.019201][ T6836] get_perf_callchain+0x321/0x620 [ 81.024207][ T6836] ? put_callchain_entry+0x90/0x90 [ 81.029292][ T6836] ? get_perf_callchain+0x3e0/0x620 [ 81.034465][ T6836] ? kvm_sched_clock_read+0x14/0x40 [ 81.039686][ T6836] ? sched_clock+0x2a/0x40 [ 81.044075][ T6836] ? sched_clock_cpu+0x18/0x1b0 [ 81.048924][ T6836] perf_callchain+0x165/0x1c0 [ 81.053575][ T6836] perf_prepare_sample+0x8fd/0x1d40 [ 81.058747][ T6836] ? perf_callchain+0x1c0/0x1c0 [ 81.063574][ T6836] ? lock_downgrade+0x830/0x830 [ 81.068400][ T6836] perf_event_output_forward+0xf3/0x270 [ 81.073921][ T6836] ? perf_prepare_sample+0x1d40/0x1d40 [ 81.079356][ T6836] ? perf_swevent_event+0x144/0x550 [ 81.084531][ T6836] ? tracing_generic_entry_update+0x1ed/0x270 [ 81.090622][ T6836] __perf_event_overflow+0x13c/0x370 [ 81.095897][ T6836] perf_swevent_event+0x4b9/0x550 [ 81.100897][ T6836] perf_tp_event+0x2e4/0xb50 [ 81.105464][ T6836] ? perf_event_mmap_output+0xa30/0xa30 [ 81.110984][ T6836] ? perf_tp_event+0x622/0xb50 [ 81.115740][ T6836] ? perf_event_mmap_output+0xa30/0xa30 [ 81.121263][ T6836] ? mark_lock+0xbc/0x1710 [ 81.125660][ T6836] ? __lock_acquire+0x16cb/0x5640 [ 81.130664][ T6836] ? perf_trace_run_bpf_submit+0x11c/0x200 [ 81.136455][ T6836] perf_trace_run_bpf_submit+0x11c/0x200 [ 81.142082][ T6836] perf_trace_lock_acquire+0x33f/0x520 [ 81.147517][ T6836] ? SOFTIRQ_verbose+0x10/0x10 [ 81.152257][ T6836] ? __lock_acquire+0xbb5/0x5640 [ 81.159182][ T6836] lock_acquire+0x382/0xad0 [ 81.163662][ T6836] ? clear_subpage+0x100/0x100 [ 81.168402][ T6836] ? lock_release+0x8e0/0x8e0 [ 81.173054][ T6836] ? lock_acquire+0x1f1/0xad0 [ 81.177746][ T6836] count_memcg_event_mm.part.0+0x39/0x3c0 [ 81.183461][ T6836] ? clear_subpage+0x100/0x100 [ 81.188265][ T6836] handle_mm_fault+0x11d/0x4590 [ 81.193111][ T6836] ? apply_to_existing_page_range+0x40/0x40 [ 81.199159][ T6836] ? down_read_trylock+0x193/0x350 [ 81.204247][ T6836] ? do_user_addr_fault+0x25e/0xbf0 [ 81.209508][ T6836] ? vmacache_find+0x62/0x310 [ 81.214301][ T6836] do_user_addr_fault+0x598/0xbf0 [ 81.219316][ T6836] ? rcu_read_lock_sched_held+0x3a/0xb0 [ 81.224845][ T6836] exc_page_fault+0xa8/0x160 [ 81.229523][ T6836] ? asm_exc_page_fault+0x8/0x30 [ 81.234442][ T6836] asm_exc_page_fault+0x1e/0x30 [ 81.239267][ T6836] RIP: 0033:0x49f4b0 [ 81.243272][ T6836] Code: Bad RIP value. [ 81.247314][ T6836] RSP: 002b:00007ffe497c1e28 EFLAGS: 00010202 [ 81.253351][ T6836] RAX: 000000000049f4b0 RBX: 0000000000000001 RCX: 00000000006d1190 [ 81.261297][ T6836] RDX: 0000000000402120 RSI: 0000000000000000 RDI: 00000000004bf828 [ 81.269254][ T6836] RBP: 00007ffe497c1e30 R08: 0000000000000000 R09: 00000000004002c8 [ 81.277201][ T6836] R10: 00000000ffffffff R11: 0000000000000246 R12: 0000000000000001 [ 81.285163][ T6836] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 81.294581][ T6836] Kernel Offset: disabled [ 81.298900][ T6836] Rebooting in 86400 seconds..