[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.243' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 61.705393][ T6826] IPVS: ftp: loaded support on port[0] = 21 [ 61.812761][ C0] general protection fault, probably for non-canonical address 0xf33bb70012bc003b: 0000 [#1] PREEMPT SMP KASAN [ 61.824769][ C0] KASAN: maybe wild-memory-access in range [0x99ddd80095e001d8-0x99ddd80095e001df] [ 61.834045][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.8.0-rc4-next-20200710-syzkaller #0 [ 61.843534][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.853799][ C0] RIP: 0010:htab_elem_free_rcu+0x4a/0x110 [ 61.859585][ C0] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bc 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b f8 48 8d 7d 18 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 82 00 00 00 44 8b 65 18 bf 05 [ 61.879261][ C0] RSP: 0018:ffffc90000007e48 EFLAGS: 00010a03 [ 61.885310][ C0] RAX: dffffc0000000000 RBX: ffff888084800010 RCX: 0000000000000001 [ 61.893279][ C0] RDX: 133bbb0012bc003b RSI: ffffffff8186891e RDI: 99ddd80095e001de [ 61.901240][ C0] RBP: 99ddd80095e001c6 R08: 0000000000000000 R09: ffffffff8c5b09f7 [ 61.909203][ C0] R10: fffffbfff18b613e R11: 0000000000000000 R12: ffffc90000007ed8 [ 61.917221][ C0] R13: ffff888084800000 R14: 0000000000000000 R15: ffffffff89a86580 [ 61.925178][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 61.934114][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 61.940673][ C0] CR2: 00000000004c6368 CR3: 0000000009a79000 CR4: 00000000001506f0 [ 61.949333][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 61.957469][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 61.965414][ C0] Call Trace: [ 61.968689][ C0] [ 61.971525][ C0] rcu_core+0x5dc/0x11d0 [ 61.975745][ C0] ? __rcu_read_unlock+0x560/0x560 [ 61.980945][ C0] ? trace_hardirqs_on+0x5f/0x220 [ 61.986099][ C0] ? lock_is_held_type+0xb0/0xe0 [ 61.991023][ C0] __do_softirq+0x34c/0xa60 [ 61.995513][ C0] asm_call_on_stack+0xf/0x20 [ 62.000159][ C0] [ 62.003074][ C0] do_softirq_own_stack+0x111/0x170 [ 62.008252][ C0] irq_exit_rcu+0x229/0x270 [ 62.012732][ C0] sysvec_apic_timer_interrupt+0x54/0x120 [ 62.018423][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 62.024565][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 62.029917][ C0] Code: ff 4c 89 ef e8 93 66 c6 f9 e9 8e fe ff ff 48 89 df e8 86 66 c6 f9 eb 8a cc cc cc cc e9 07 00 00 00 0f 00 2d 34 9b 5b 00 fb f4 90 e9 07 00 00 00 0f 00 2d 24 9b 5b 00 f4 c3 cc cc 55 53 e8 09 [ 62.049510][ C0] RSP: 0018:ffffffff89a07c70 EFLAGS: 00000293 [ 62.055571][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 62.063523][ C0] RDX: ffffffff89a86580 RSI: ffffffff87ed2968 RDI: ffffffff87ed293e [ 62.071495][ C0] RBP: ffff8880a6a93064 R08: 0000000000000000 R09: 0000000000000000 [ 62.079446][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a6a93064 [ 62.087402][ C0] R13: 1ffffffff1340f98 R14: ffff8880a6a93065 R15: 0000000000000001 [ 62.095367][ C0] ? acpi_safe_halt+0x88/0x110 [ 62.100125][ C0] ? acpi_safe_halt+0x5e/0x110 [ 62.104869][ C0] acpi_safe_halt+0x8d/0x110 [ 62.109431][ C0] acpi_idle_do_entry+0x15c/0x1b0 [ 62.114444][ C0] acpi_idle_enter+0x3f9/0xab0 [ 62.119183][ C0] ? acpi_idle_enter_bm+0x2d0/0x2d0 [ 62.124361][ C0] ? kvm_sched_clock_read+0x14/0x40 [ 62.129529][ C0] ? sched_clock+0x2a/0x40 [ 62.133917][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 62.139264][ C0] cpuidle_enter_state+0xff/0x960 [ 62.144265][ C0] ? tick_nohz_idle_enter+0x238/0x360 [ 62.149608][ C0] cpuidle_enter+0x4a/0xa0 [ 62.153998][ C0] do_idle+0x431/0x6d0 [ 62.158045][ C0] ? arch_cpu_idle_exit+0x70/0x70 [ 62.163044][ C0] ? trace_init_perf_perm_irq_work_exit+0xe/0xe [ 62.169469][ C0] cpu_startup_entry+0x14/0x20 [ 62.174218][ C0] start_kernel+0x9cb/0xa06 [ 62.178701][ C0] ? mem_encrypt_init+0x5/0x5 [ 62.183358][ C0] ? x86_cpuid_vendor+0x84/0x90 [ 62.188190][ C0] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 62.194164][ C0] ? load_ucode_bsp+0x1b7/0x1f7 [ 62.199006][ C0] secondary_startup_64+0xa4/0xb0 [ 62.204001][ C0] Modules linked in: [ 62.207941][ C0] ---[ end trace 5ce7b44eaacf6c96 ]--- [ 62.213416][ C0] RIP: 0010:htab_elem_free_rcu+0x4a/0x110 [ 62.219131][ C0] Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bc 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 6b f8 48 8d 7d 18 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 82 00 00 00 44 8b 65 18 bf 05 [ 62.238799][ C0] RSP: 0018:ffffc90000007e48 EFLAGS: 00010a03 [ 62.244915][ C0] RAX: dffffc0000000000 RBX: ffff888084800010 RCX: 0000000000000001 [ 62.252927][ C0] RDX: 133bbb0012bc003b RSI: ffffffff8186891e RDI: 99ddd80095e001de [ 62.260898][ C0] RBP: 99ddd80095e001c6 R08: 0000000000000000 R09: ffffffff8c5b09f7 [ 62.268928][ C0] R10: fffffbfff18b613e R11: 0000000000000000 R12: ffffc90000007ed8 [ 62.277675][ C0] R13: ffff888084800000 R14: 0000000000000000 R15: ffffffff89a86580 [ 62.285671][ C0] FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 62.294623][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 62.301199][ C0] CR2: 00000000004c6368 CR3: 0000000009a79000 CR4: 00000000001506f0 [ 62.309179][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 62.317198][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 62.325224][ C0] Kernel panic - not syncing: Fatal exception in interrupt [ 62.334169][ C0] Kernel Offset: disabled [ 62.338487][ C0] Rebooting in 86400 seconds..