[ 108.726057][ T27] audit: type=1800 audit(1579709519.750:36): pid=10501 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. Starting mcstransd: [....] 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 syzkaller login: [ 113.535066][ T27] kauditd_printk_skb: 4 callbacks suppressed [ 113.535083][ T27] audit: type=1400 audit(1579709524.680:41): avc: denied { map } for pid=10676 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 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 [ 120.416398][ T27] audit: type=1400 audit(1579709531.560:42): avc: denied { map } for pid=10688 comm="syz-executor981" path="/root/syz-executor981474751" dev="sda1" ino=2339 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 [ 120.443957][ T27] audit: type=1400 audit(1579709531.560:43): avc: denied { create } for pid=10689 comm="syz-executor981" 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 [ 120.470210][ T27] audit: type=1400 audit(1579709531.560:44): avc: denied { write } for pid=10689 comm="syz-executor981" 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 [ 121.437675][ C0] ================================================================== [ 121.446051][ C0] BUG: KASAN: slab-out-of-bounds in bitmap_ipmac_gc+0x119/0x590 [ 121.454233][ C0] Read of size 8 at addr ffff88809e4fcd40 by task swapper/0/0 [ 121.461756][ C0] [ 121.464104][ C0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.5.0-rc7-syzkaller #0 [ 121.472224][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 121.482286][ C0] Call Trace: [ 121.485576][ C0] [ 121.488476][ C0] dump_stack+0x197/0x210 [ 121.492818][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 121.497781][ C0] print_address_description.constprop.0.cold+0xd4/0x30b [ 121.504844][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 121.509841][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 121.514848][ C0] __kasan_report.cold+0x1b/0x41 [ 121.519819][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 121.524784][ C0] kasan_report+0x12/0x20 [ 121.529111][ C0] check_memory_region+0x134/0x1a0 [ 121.534245][ C0] __kasan_check_read+0x11/0x20 [ 121.539108][ C0] bitmap_ipmac_gc+0x119/0x590 [ 121.543889][ C0] call_timer_fn+0x1ac/0x780 [ 121.548535][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 121.553842][ C0] ? msleep_interruptible+0x150/0x150 [ 121.559229][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 121.564446][ C0] ? trace_hardirqs_on+0x67/0x240 [ 121.569485][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 121.574817][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 121.580231][ C0] run_timer_softirq+0x6c3/0x1790 [ 121.585281][ C0] ? add_timer+0x930/0x930 [ 121.589746][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 121.595997][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 121.601577][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 121.608236][ C0] ? trace_hardirqs_on+0x67/0x240 [ 121.613276][ C0] __do_softirq+0x262/0x98c [ 121.617791][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 121.622659][ C0] irq_exit+0x19b/0x1e0 [ 121.626830][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 121.632394][ C0] apic_timer_interrupt+0xf/0x20 [ 121.637442][ C0] [ 121.640376][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 121.646903][ 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 [ 121.666766][ C0] RSP: 0018:ffffffff89807ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 121.675193][ C0] RAX: 1ffffffff1326676 RBX: ffffffff8987a140 RCX: 0000000000000000 [ 121.683526][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8987a9d4 [ 121.691502][ C0] RBP: ffffffff89807d18 R08: ffffffff8987a140 R09: 0000000000000000 [ 121.699538][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 121.707623][ C0] R13: ffffffff8a7b4e80 R14: 0000000000000000 R15: 0000000000000000 [ 121.715764][ C0] ? default_idle+0x4e/0x360 [ 121.720424][ C0] arch_cpu_idle+0xa/0x10 [ 121.724763][ C0] default_idle_call+0x84/0xb0 [ 121.729647][ C0] do_idle+0x3c8/0x6e0 [ 121.734648][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 121.739745][ C0] ? trace_hardirqs_on+0x67/0x240 [ 121.744803][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.751097][ C0] ? debug_smp_processor_id+0x33/0x18a [ 121.756568][ C0] cpu_startup_entry+0x1b/0x20 [ 121.761396][ C0] rest_init+0x23b/0x371 [ 121.765776][ C0] arch_call_rest_init+0xe/0x1b [ 121.770640][ C0] start_kernel+0x904/0x943 [ 121.775140][ C0] ? mem_encrypt_init+0xb/0xb [ 121.779820][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 121.786077][ C0] ? x86_family+0x41/0x50 [ 121.790423][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 121.796875][ C0] x86_64_start_reservations+0x29/0x2b [ 121.802456][ C0] x86_64_start_kernel+0x77/0x7b [ 121.807642][ C0] secondary_startup_64+0xa4/0xb0 [ 121.812671][ C0] [ 121.815136][ C0] Allocated by task 10689: [ 121.819564][ C0] save_stack+0x23/0x90 [ 121.823727][ C0] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 121.829488][ C0] kasan_kmalloc+0x9/0x10 [ 121.833874][ C0] __kmalloc+0x163/0x770 [ 121.838116][ C0] ip_set_alloc+0x38/0x5e [ 121.842541][ C0] bitmap_ipmac_create+0x4e8/0xa00 [ 121.847665][ C0] ip_set_create+0x6f1/0x1500 [ 121.852444][ C0] nfnetlink_rcv_msg+0xcf2/0xfb0 [ 121.857403][ C0] netlink_rcv_skb+0x177/0x450 [ 121.862244][ C0] nfnetlink_rcv+0x1ba/0x460 [ 121.866910][ C0] netlink_unicast+0x58c/0x7d0 [ 121.871687][ C0] netlink_sendmsg+0x91c/0xea0 [ 121.876805][ C0] sock_sendmsg+0xd7/0x130 [ 121.881399][ C0] ____sys_sendmsg+0x753/0x880 [ 121.886285][ C0] ___sys_sendmsg+0x100/0x170 [ 121.891013][ C0] __sys_sendmsg+0x105/0x1d0 [ 121.895615][ C0] __x64_sys_sendmsg+0x78/0xb0 [ 121.900499][ C0] do_syscall_64+0xfa/0x790 [ 121.905176][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.911221][ C0] [ 121.913811][ C0] Freed by task 10464: [ 121.917880][ C0] save_stack+0x23/0x90 [ 121.922074][ C0] __kasan_slab_free+0x102/0x150 [ 121.927002][ C0] kasan_slab_free+0xe/0x10 [ 121.931514][ C0] kfree+0x10a/0x2c0 [ 121.935412][ C0] security_cred_free+0xa9/0x110 [ 121.940350][ C0] put_cred_rcu+0x129/0x4b0 [ 121.945121][ C0] __put_cred+0x1ef/0x270 [ 121.949443][ C0] do_faccessat+0x693/0x7f0 [ 121.953951][ C0] __x64_sys_access+0x59/0x80 [ 121.958632][ C0] do_syscall_64+0xfa/0x790 [ 121.963141][ C0] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 121.969018][ C0] [ 121.971340][ C0] The buggy address belongs to the object at ffff88809e4fcd40 [ 121.971340][ C0] which belongs to the cache kmalloc-32 of size 32 [ 121.985383][ C0] The buggy address is located 0 bytes inside of [ 121.985383][ C0] 32-byte region [ffff88809e4fcd40, ffff88809e4fcd60) [ 121.998391][ C0] The buggy address belongs to the page: [ 122.004083][ C0] page:ffffea0002793f00 refcount:1 mapcount:0 mapping:ffff8880aa4001c0 index:0xffff88809e4fcfc1 [ 122.014503][ C0] raw: 00fffe0000000200 ffffea0002805648 ffffea0002774d08 ffff8880aa4001c0 [ 122.023103][ C0] raw: ffff88809e4fcfc1 ffff88809e4fc000 0000000100000023 0000000000000000 [ 122.031683][ C0] page dumped because: kasan: bad access detected [ 122.038523][ C0] [ 122.040841][ C0] Memory state around the buggy address: [ 122.046472][ C0] ffff88809e4fcc00: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 122.054543][ C0] ffff88809e4fcc80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 122.062764][ C0] >ffff88809e4fcd00: fb fb fb fb fc fc fc fc 04 fc fc fc fc fc fc fc [ 122.070829][ C0] ^ [ 122.076993][ C0] ffff88809e4fcd80: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 122.085058][ C0] ffff88809e4fce00: 04 fc fc fc fc fc fc fc 05 fc fc fc fc fc fc fc [ 122.093161][ C0] ================================================================== [ 122.101258][ C0] Disabling lock debugging due to kernel taint [ 122.107494][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 122.114181][ C0] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G B 5.5.0-rc7-syzkaller #0 [ 122.123523][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 122.133823][ C0] Call Trace: [ 122.137094][ C0] [ 122.140095][ C0] dump_stack+0x197/0x210 [ 122.144487][ C0] panic+0x2e3/0x75c [ 122.148379][ C0] ? add_taint.cold+0x16/0x16 [ 122.153040][ C0] ? retint_kernel+0x2b/0x2b [ 122.157631][ C0] ? trace_hardirqs_on+0x5e/0x240 [ 122.162755][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 122.167806][ C0] end_report+0x47/0x4f [ 122.171970][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 122.177088][ C0] __kasan_report.cold+0xe/0x41 [ 122.181937][ C0] ? bitmap_ipmac_gc+0x119/0x590 [ 122.187021][ C0] kasan_report+0x12/0x20 [ 122.191354][ C0] check_memory_region+0x134/0x1a0 [ 122.196462][ C0] __kasan_check_read+0x11/0x20 [ 122.201313][ C0] bitmap_ipmac_gc+0x119/0x590 [ 122.206067][ C0] call_timer_fn+0x1ac/0x780 [ 122.210653][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 122.215952][ C0] ? msleep_interruptible+0x150/0x150 [ 122.221326][ C0] ? run_timer_softirq+0x6b1/0x1790 [ 122.226519][ C0] ? trace_hardirqs_on+0x67/0x240 [ 122.231598][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 122.236896][ C0] ? bitmap_ipmac_list+0x1080/0x1080 [ 122.242185][ C0] run_timer_softirq+0x6c3/0x1790 [ 122.247938][ C0] ? add_timer+0x930/0x930 [ 122.252415][ C0] ? rcu_lockdep_current_cpu_online+0xe3/0x130 [ 122.258634][ C0] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 122.264203][ C0] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 122.271976][ C0] ? trace_hardirqs_on+0x67/0x240 [ 122.277274][ C0] __do_softirq+0x262/0x98c [ 122.282072][ C0] ? sched_clock_cpu+0x1b/0x1b0 [ 122.287183][ C0] irq_exit+0x19b/0x1e0 [ 122.291355][ C0] smp_apic_timer_interrupt+0x1a3/0x610 [ 122.297132][ C0] apic_timer_interrupt+0xf/0x20 [ 122.302065][ C0] [ 122.305176][ C0] RIP: 0010:native_safe_halt+0xe/0x10 [ 122.310544][ 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 [ 122.330140][ C0] RSP: 0018:ffffffff89807ce8 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 122.339065][ C0] RAX: 1ffffffff1326676 RBX: ffffffff8987a140 RCX: 0000000000000000 [ 122.347069][ C0] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: ffffffff8987a9d4 [ 122.355129][ C0] RBP: ffffffff89807d18 R08: ffffffff8987a140 R09: 0000000000000000 [ 122.363246][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 122.371228][ C0] R13: ffffffff8a7b4e80 R14: 0000000000000000 R15: 0000000000000000 [ 122.379225][ C0] ? default_idle+0x4e/0x360 [ 122.384061][ C0] arch_cpu_idle+0xa/0x10 [ 122.388412][ C0] default_idle_call+0x84/0xb0 [ 122.393333][ C0] do_idle+0x3c8/0x6e0 [ 122.397522][ C0] ? arch_cpu_idle_exit+0x80/0x80 [ 122.402607][ C0] ? trace_hardirqs_on+0x67/0x240 [ 122.408021][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.414272][ C0] ? debug_smp_processor_id+0x33/0x18a [ 122.419727][ C0] cpu_startup_entry+0x1b/0x20 [ 122.424479][ C0] rest_init+0x23b/0x371 [ 122.429104][ C0] arch_call_rest_init+0xe/0x1b [ 122.433964][ C0] start_kernel+0x904/0x943 [ 122.438466][ C0] ? mem_encrypt_init+0xb/0xb [ 122.443144][ C0] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 122.449486][ C0] ? x86_family+0x41/0x50 [ 122.453926][ C0] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 122.460284][ C0] x86_64_start_reservations+0x29/0x2b [ 122.465854][ C0] x86_64_start_kernel+0x77/0x7b [ 122.470789][ C0] secondary_startup_64+0xa4/0xb0 [ 122.477342][ C0] Kernel Offset: disabled [ 122.481822][ C0] Rebooting in 86400 seconds..