[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [ 91.178094][T10414] sshd (10414) used greatest stack depth: 22936 bytes left [ 91.374781][ T27] audit: type=1400 audit(1579714846.971:37): avc: denied { watch } for pid=10439 comm="restorecond" path="/root/.ssh" dev="sda1" ino=16179 scontext=system_u:system_r:kernel_t:s0 tcontext=unconfined_u:object_r:ssh_home_t:s0 tclass=dir permissive=1 [....] 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 Warning: Permanently added '10.128.0.89' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program executing program executing program syzkaller login: [ 107.153339][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 107.153356][ T27] audit: type=1400 audit(1579714862.751:42): avc: denied { map } for pid=10540 comm="syz-executor465" path="/root/syz-executor465380545" 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 107.187275][ T27] audit: type=1400 audit(1579714862.751:43): avc: denied { create } for pid=10541 comm="syz-executor465" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 [ 107.212784][ T27] audit: type=1400 audit(1579714862.761:44): avc: denied { write } for pid=10541 comm="syz-executor465" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket 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 [ 109.216890][ C0] ================================================================== [ 109.225164][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 [ 109.233033][ C0] Read of size 8 at addr ffff88809e2d8980 by task swapper/0/0 [ 109.240467][ C0] [ 109.242794][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc7-syzkaller #0 [ 109.250816][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 109.260879][ C0] Call Trace: [ 109.264157][ C0] [ 109.267178][ C0] dump_stack+0x197/0x210 [ 109.271610][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.276559][ C0] print_address_description.constprop.0.cold+0xd4/0x30b [ 109.283585][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.288632][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.293575][ C0] __kasan_report.cold+0x1b/0x41 [ 109.298500][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.303438][ C0] kasan_report+0x12/0x20 [ 109.307763][ C0] check_memory_region+0x134/0x1a0 [ 109.313572][ C0] __kasan_check_read+0x11/0x20 [ 109.318437][ C0] bitmap_ipmac_gc+0x119/0x590 [ 109.324075][ C0] call_timer_fn+0x1ac/0x780 [ 109.328661][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 109.333961][ C0] ? msleep_interruptible+0x150/0x150 [ 109.339328][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 109.344534][ C0] ? trace_hardirqs_on+0x67/0x240 [ 109.349550][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 109.354836][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 109.360126][ C0] run_timer_softirq+0x6c3/0x1790 [ 109.365150][ C0] ? add_timer+0x930/0x930 [ 109.369562][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 109.375720][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 109.381350][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 109.387487][ C0] ? trace_hardirqs_on+0x67/0x240 [ 109.392860][ C0] __do_softirq+0x262/0x98c [ 109.397588][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 109.402443][ C0] irq_exit+0x19b/0x1e0 [ 109.406610][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 109.412660][ C0] apic_timer_interrupt+0xf/0x20 [ 109.417593][ C0] [ 109.420526][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 109.425893][ C0] Code: b8 80 de f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d c4 41 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d b4 41 54 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be 4d 8e f9 e8 49 [ 109.445490][ C0] RSP: 0018:ffffffff89807ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 109.453894][ C0] RAX: 1ffffffff1326676 RBX: ffffffff8987a140 RCX: 0000000000000000 [ 109.461955][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8987a9d4 [ 109.470309][ C0] RBP: ffffffff89807d18 R08: ffffffff8987a140 R09: 0000000000000000 [ 109.478744][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 109.486709][ C0] R13: ffffffff8a7b4e80 R14: 0000000000000000 R15: 0000000000000000 [ 109.494696][ C0] ? default_idle+0x4e/0x360 [ 109.499286][ C0] arch_cpu_idle+0xa/0x10 [ 109.503612][ C0] default_idle_call+0x84/0xb0 [ 109.508439][ C0] do_idle+0x3c8/0x6e0 [ 109.512518][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 109.517530][ C0] ? trace_hardirqs_on+0x67/0x240 [ 109.522553][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 109.528793][ C0] ? debug_smp_processor_id+0x33/0x18a [ 109.534346][ C0] cpu_startup_entry+0x1b/0x20 [ 109.539109][ C0] rest_init+0x23b/0x371 [ 109.543363][ C0] arch_call_rest_init+0xe/0x1b [ 109.548209][ C0] start_kernel+0x904/0x943 [ 109.552758][ C0] ? mem_encrypt_init+0xb/0xb [ 109.557472][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 109.563715][ C0] ? x86_family+0x41/0x50 [ 109.568037][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 109.574280][ C0] x86_64_start_reservations+0x29/0x2b [ 109.579739][ C0] x86_64_start_kernel+0x77/0x7b [ 109.584719][ C0] secondary_startup_64+0xa4/0xb0 [ 109.589736][ C0] [ 109.592054][ C0] Allocated by task 10541: [ 109.596529][ C0] save_stack+0x23/0x90 [ 109.600679][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 109.606313][ C0] kasan_kmalloc+0x9/0x10 [ 109.610760][ C0] __kmalloc+0x163/0x770 [ 109.614992][ C0] ip_set_alloc+0x38/0x5e [ 109.619312][ C0] bitmap_ipmac_create+0x4e8/0xa00 [ 109.624758][ C0] ip_set_create+0x6f1/0x1500 [ 109.629424][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 109.634347][ C0] netlink_rcv_skb+0x177/0x450 [ 109.639103][ C0] nfnetlink_rcv+0x1ba/0x460 [ 109.643717][ C0] netlink_unicast+0x58c/0x7d0 [ 109.648572][ C0] netlink_sendmsg+0x91c/0xea0 [ 109.653335][ C0] sock_sendmsg+0xd7/0x130 [ 109.657950][ C0] ____sys_sendmsg+0x753/0x880 [ 109.662713][ C0] ___sys_sendmsg+0x100/0x170 [ 109.667385][ C0] __sys_sendmsg+0x105/0x1d0 [ 109.671973][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 109.676729][ C0] do_syscall_64+0xfa/0x790 [ 109.681227][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 109.687098][ C0] [ 109.689410][ C0] Freed by task 4107: [ 109.693428][ C0] save_stack+0x23/0x90 [ 109.697582][ C0] __kasan_slab_free+0x102/0x150 [ 109.702653][ C0] kasan_slab_free+0xe/0x10 [ 109.707157][ C0] kfree+0x10a/0x2c0 [ 109.711056][ C0] tomoyo_path_number_perm+0x454/0x520 [ 109.716499][ C0] tomoyo_file_ioctl+0x23/0x30 [ 109.721357][ C0] security_file_ioctl+0x77/0xc0 [ 109.726618][ C0] ksys_ioctl+0x57/0xd0 [ 109.731470][ C0] __x64_sys_ioctl+0x73/0xb0 [ 109.736046][ C0] do_syscall_64+0xfa/0x790 [ 109.740538][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 109.746412][ C0] [ 109.748738][ C0] The buggy address belongs to the object at ffff88809e2d8980 [ 109.748738][ C0] which belongs to the cache kmalloc-32 of size 32 [ 109.762605][ C0] The buggy address is located 0 bytes inside of [ 109.762605][ C0] 32-byte region [ffff88809e2d8980, ffff88809e2d89a0) [ 109.775722][ C0] The buggy address belongs to the page: [ 109.781354][ C0] page:ffffea000278b600 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e2d8fc1 [ 109.791755][ C0] raw: 00fffe0000000200 ffffea000268b1c8 ffffea000277fd08 ffff8880aa4001c0 [ 109.800416][ C0] raw: ffff88809e2d8fc1 ffff88809e2d8000 0000000100000030 0000000000000000 [ 109.809336][ C0] page dumped because: kasan: bad access detected [ 109.815790][ C0] [ 109.818129][ C0] Memory state around the buggy address: [ 109.824110][ C0] ffff88809e2d8880: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 109.832177][ C0] ffff88809e2d8900: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 109.840234][ C0] >ffff88809e2d8980: 04 fc fc fc fc fc fc fc fb fb fb fb fc fc fc fc [ 109.848286][ C0] ^ [ 109.852348][ C0] ffff88809e2d8a00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 109.860415][ C0] ffff88809e2d8a80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 109.868460][ C0] ================================================================== [ 109.876720][ C0] Disabling lock debugging due to kernel taint [ 109.882894][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 109.889488][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 5.5.0-rc7-syzkaller #0 [ 109.898771][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 109.908857][ C0] Call Trace: [ 109.912142][ C0] [ 109.915017][ C0] dump_stack+0x197/0x210 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 109.919362][ C0] panic+0x2e3/0x75c [ 109.923270][ C0] ? add_taint.cold+0x16/0x16 [ 109.927945][ C0] ? retint_kernel+0x2b/0x2b [ 109.932630][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 109.937671][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.942618][ C0] end_report+0x47/0x4f [ 109.946843][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.951796][ C0] __kasan_report.cold+0xe/0x41 [ 109.956764][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 109.961720][ C0] kasan_report+0x12/0x20 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 109.966048][ C0] check_memory_region+0x134/0x1a0 [ 109.971167][ C0] __kasan_check_read+0x11/0x20 [ 109.976021][ C0] bitmap_ipmac_gc+0x119/0x590 [ 109.980798][ C0] call_timer_fn+0x1ac/0x780 [ 109.985400][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 109.990690][ C0] ? msleep_interruptible+0x150/0x150 [ 109.996074][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 110.001285][ C0] ? trace_hardirqs_on+0x67/0x240 [ 110.006839][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 110.012143][ C0] ? bitmap_ipmac_list+0x1080/0x1080 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.017534][ C0] run_timer_softirq+0x6c3/0x1790 [ 110.022560][ C0] ? add_timer+0x930/0x930 [ 110.026982][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 110.033259][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 110.038819][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 110.044932][ C0] ? trace_hardirqs_on+0x67/0x240 [ 110.049972][ C0] __do_softirq+0x262/0x98c [ 110.054497][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 110.059346][ C0] irq_exit+0x19b/0x1e0 [ 110.063613][ C0] smp_apic_timer_interrupt+0x1a3/0x610 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.069170][ C0] apic_timer_interrupt+0xf/0x20 [ 110.074249][ C0] [ 110.077251][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 110.082624][ C0] Code: b8 80 de f9 eb 8a cc cc cc cc cc cc e9 07 00 00 00 0f 00 2d c4 41 54 00 f4 c3 66 90 e9 07 00 00 00 0f 00 2d b4 41 54 00 fb f4 cc 55 48 89 e5 41 57 41 56 41 55 41 54 53 e8 be 4d 8e f9 e8 49 [ 110.102458][ C0] RSP: 0018:ffffffff89807ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 110.110867][ C0] RAX: 1ffffffff1326676 RBX: ffffffff8987a140 RCX: 0000000000000000 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.118928][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8987a9d4 [ 110.126905][ C0] RBP: ffffffff89807d18 R08: ffffffff8987a140 R09: 0000000000000000 [ 110.134881][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 110.142862][ C0] R13: ffffffff8a7b4e80 R14: 0000000000000000 R15: 0000000000000000 [ 110.150986][ C0] ? default_idle+0x4e/0x360 [ 110.155581][ C0] arch_cpu_idle+0xa/0x10 [ 110.159912][ C0] default_idle_call+0x84/0xb0 [ 110.164686][ C0] do_idle+0x3c8/0x6e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 110.168760][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 110.173792][ C0] ? trace_hardirqs_on+0x67/0x240 [ 110.178827][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 110.185084][ C0] ? debug_smp_processor_id+0x33/0x18a [ 110.190552][ C0] cpu_startup_entry+0x1b/0x20 [ 110.195324][ C0] rest_init+0x23b/0x371 [ 110.199574][ C0] arch_call_rest_init+0xe/0x1b [ 110.204431][ C0] start_kernel+0x904/0x943 [ 110.208942][ C0] ? mem_encrypt_init+0xb/0xb [ 110.213771][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 executing program executing program executing program executing program executing program executing program [ 110.220027][ C0] ? x86_family+0x41/0x50 [ 110.224366][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 110.230713][ C0] x86_64_start_reservations+0x29/0x2b [ 110.236181][ C0] x86_64_start_kernel+0x77/0x7b [ 110.241220][ C0] secondary_startup_64+0xa4/0xb0 [ 110.247639][ C0] Kernel Offset: disabled [ 110.251968][ C0] Rebooting in 86400 seconds..