[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 38.824416] audit: type=1800 audit(1545752455.912:25): pid=7745 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 38.866458] audit: type=1800 audit(1545752455.912:26): pid=7745 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 38.889038] audit: type=1800 audit(1545752455.922:27): pid=7745 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?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 '10.128.0.125' (ECDSA) to the list of known hosts. executing program executing program executing program syzkaller login: [ 48.691449] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 48.716782] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 48.740579] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 48.764648] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 48.788820] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 48.813604] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 48.839051] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 48.862806] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program executing program executing program [ 48.888744] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 48.912740] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 51.349661] ================================================================== [ 51.357170] BUG: KASAN: use-after-free in generic_gcmaes_encrypt+0xc6/0x190 [ 51.364271] Read of size 12 at addr ffff8881d80ab380 by task kworker/1:2/3428 [ 51.371536] [ 51.373149] CPU: 1 PID: 3428 Comm: kworker/1:2 Not tainted 4.20.0-rc7+ #248 [ 51.380226] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.389573] Workqueue: pencrypt padata_parallel_worker [ 51.394863] Call Trace: [ 51.397435] dump_stack+0x1d3/0x2c6 [ 51.401048] ? dump_stack_print_info.cold.1+0x20/0x20 [ 51.406239] ? printk+0xa7/0xcf [ 51.409522] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 51.414269] print_address_description.cold.8+0x9/0x1ff [ 51.419620] kasan_report.cold.9+0x242/0x309 [ 51.424010] ? generic_gcmaes_encrypt+0xc6/0x190 [ 51.428755] check_memory_region+0x13e/0x1b0 [ 51.433148] memcpy+0x23/0x50 [ 51.436241] generic_gcmaes_encrypt+0xc6/0x190 [ 51.440808] ? helper_rfc4106_encrypt+0x4a0/0x4a0 [ 51.445638] ? kasan_check_read+0x11/0x20 [ 51.449771] ? do_raw_spin_unlock+0xa7/0x330 [ 51.454164] gcmaes_wrapper_encrypt+0x162/0x200 [ 51.458822] pcrypt_aead_enc+0xcb/0x190 [ 51.462783] padata_parallel_worker+0x49d/0x760 [ 51.467438] ? padata_do_parallel+0x8b0/0x8b0 [ 51.471919] ? graph_lock+0x270/0x270 [ 51.475730] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 51.481262] ? check_preemption_disabled+0x48/0x280 [ 51.486265] ? __lock_is_held+0xb5/0x140 [ 51.490321] process_one_work+0xc90/0x1c40 [ 51.494539] ? mark_held_locks+0x130/0x130 [ 51.498767] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 51.503418] ? __switch_to_asm+0x40/0x70 [ 51.507459] ? __switch_to_asm+0x40/0x70 [ 51.511532] ? __switch_to_asm+0x34/0x70 [ 51.515592] ? __switch_to_asm+0x40/0x70 [ 51.519665] ? __switch_to_asm+0x34/0x70 [ 51.523706] ? __switch_to_asm+0x40/0x70 [ 51.527781] ? __switch_to_asm+0x34/0x70 [ 51.531842] ? __switch_to_asm+0x40/0x70 [ 51.535892] ? __schedule+0x874/0x1ed0 [ 51.539764] ? __switch_to_asm+0x34/0x70 [ 51.543837] ? __switch_to_asm+0x40/0x70 [ 51.547889] ? graph_lock+0x270/0x270 [ 51.551675] ? __sched_text_start+0x8/0x8 [ 51.555814] ? lockdep_hardirqs_on+0x421/0x5c0 [ 51.560391] ? lock_acquire+0x1ed/0x520 [ 51.564362] ? worker_thread+0x3e0/0x1390 [ 51.568495] ? kasan_check_read+0x11/0x20 [ 51.572633] ? do_raw_spin_lock+0x14f/0x350 [ 51.576936] ? kasan_check_read+0x11/0x20 [ 51.581084] ? rwlock_bug.part.2+0x90/0x90 [ 51.585303] ? trace_hardirqs_on+0x310/0x310 [ 51.589701] worker_thread+0x17f/0x1390 [ 51.593662] ? __switch_to_asm+0x34/0x70 [ 51.597706] ? __switch_to_asm+0x40/0x70 [ 51.601756] ? __switch_to_asm+0x34/0x70 [ 51.605821] ? process_one_work+0x1c40/0x1c40 [ 51.610307] ? graph_lock+0x270/0x270 [ 51.614090] ? find_held_lock+0x36/0x1c0 [ 51.618149] ? __kthread_parkme+0xce/0x1a0 [ 51.622369] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 51.627469] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 51.632561] ? lockdep_hardirqs_on+0x421/0x5c0 [ 51.637127] ? trace_hardirqs_on+0xbd/0x310 [ 51.641432] ? kasan_check_read+0x11/0x20 [ 51.645564] ? __kthread_parkme+0xce/0x1a0 [ 51.649789] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 51.655221] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 51.660695] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 51.665806] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 51.671331] ? __kthread_parkme+0xfb/0x1a0 [ 51.675550] ? process_one_work+0x1c40/0x1c40 [ 51.680028] kthread+0x35a/0x440 [ 51.683375] ? kthread_bind+0x40/0x40 [ 51.687160] ret_from_fork+0x3a/0x50 [ 51.690860] [ 51.692483] Allocated by task 8105: [ 51.696091] save_stack+0x43/0xd0 [ 51.699534] kasan_kmalloc+0xc7/0xe0 [ 51.703265] kmem_cache_alloc_trace+0x152/0x750 [ 51.707933] tls_set_sw_offload+0xcb3/0x1390 [ 51.712340] tls_setsockopt+0x689/0x770 [ 51.716306] sock_common_setsockopt+0x9a/0xe0 [ 51.720804] __sys_setsockopt+0x1ba/0x3c0 [ 51.724932] __x64_sys_setsockopt+0xbe/0x150 [ 51.729343] do_syscall_64+0x1b9/0x820 [ 51.733216] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.738383] [ 51.740014] Freed by task 8105: [ 51.743276] save_stack+0x43/0xd0 [ 51.746709] __kasan_slab_free+0x102/0x150 [ 51.750937] kasan_slab_free+0xe/0x10 [ 51.754715] kfree+0xcf/0x230 [ 51.757845] tls_sk_proto_close+0x5fa/0x750 [ 51.762166] inet_release+0x104/0x1f0 [ 51.765951] inet6_release+0x50/0x70 [ 51.769646] __sock_release+0xd7/0x250 [ 51.773517] sock_close+0x19/0x20 [ 51.776953] __fput+0x385/0xa30 [ 51.780212] ____fput+0x15/0x20 [ 51.783476] task_work_run+0x1e8/0x2a0 [ 51.787363] exit_to_usermode_loop+0x318/0x380 [ 51.791930] do_syscall_64+0x6be/0x820 [ 51.795800] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 51.800967] [ 51.802576] The buggy address belongs to the object at ffff8881d80ab380 [ 51.802576] which belongs to the cache kmalloc-32 of size 32 [ 51.815073] The buggy address is located 0 bytes inside of [ 51.815073] 32-byte region [ffff8881d80ab380, ffff8881d80ab3a0) [ 51.826664] The buggy address belongs to the page: [ 51.831576] page:ffffea0007602ac0 count:1 mapcount:0 mapping:ffff8881da8001c0 index:0xffff8881d80abfc1 [ 51.841015] flags: 0x2fffc0000000200(slab) [ 51.845239] raw: 02fffc0000000200 ffffea0007302408 ffffea00073506c8 ffff8881da8001c0 [ 51.853105] raw: ffff8881d80abfc1 ffff8881d80ab000 0000000100000021 0000000000000000 [ 51.860963] page dumped because: kasan: bad access detected [ 51.866649] [ 51.868254] Memory state around the buggy address: [ 51.873163] ffff8881d80ab280: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 51.880504] ffff8881d80ab300: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 51.887845] >ffff8881d80ab380: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 51.895185] ^ [ 51.898553] ffff8881d80ab400: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 51.905901] ffff8881d80ab480: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc [ 51.913239] ================================================================== [ 51.920575] Disabling lock debugging due to kernel taint [ 51.926089] Kernel panic - not syncing: panic_on_warn set ... [ 51.931999] CPU: 1 PID: 3428 Comm: kworker/1:2 Tainted: G B 4.20.0-rc7+ #248 [ 51.940497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 51.949870] Workqueue: pencrypt padata_parallel_worker [ 51.955126] Call Trace: [ 51.957699] dump_stack+0x1d3/0x2c6 [ 51.961319] ? dump_stack_print_info.cold.1+0x20/0x20 [ 51.966508] panic+0x2ad/0x55c [ 51.969729] ? add_taint.cold.5+0x16/0x16 [ 51.973878] ? trace_hardirqs_on+0xb4/0x310 [ 51.978188] kasan_end_report+0x47/0x4f [ 51.982147] kasan_report.cold.9+0x76/0x309 [ 51.986453] ? generic_gcmaes_encrypt+0xc6/0x190 [ 51.991208] check_memory_region+0x13e/0x1b0 [ 51.995635] memcpy+0x23/0x50 [ 51.998731] generic_gcmaes_encrypt+0xc6/0x190 [ 52.003313] ? helper_rfc4106_encrypt+0x4a0/0x4a0 [ 52.008138] ? kasan_check_read+0x11/0x20 [ 52.012285] ? do_raw_spin_unlock+0xa7/0x330 [ 52.016681] gcmaes_wrapper_encrypt+0x162/0x200 [ 52.021351] pcrypt_aead_enc+0xcb/0x190 [ 52.025307] padata_parallel_worker+0x49d/0x760 [ 52.029982] ? padata_do_parallel+0x8b0/0x8b0 [ 52.034461] ? graph_lock+0x270/0x270 [ 52.038257] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.043788] ? check_preemption_disabled+0x48/0x280 [ 52.048792] ? __lock_is_held+0xb5/0x140 [ 52.052842] process_one_work+0xc90/0x1c40 [ 52.057060] ? mark_held_locks+0x130/0x130 [ 52.061283] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 52.065936] ? __switch_to_asm+0x40/0x70 [ 52.069982] ? __switch_to_asm+0x40/0x70 [ 52.074043] ? __switch_to_asm+0x34/0x70 [ 52.078088] ? __switch_to_asm+0x40/0x70 [ 52.082129] ? __switch_to_asm+0x34/0x70 [ 52.086170] ? __switch_to_asm+0x40/0x70 [ 52.090216] ? __switch_to_asm+0x34/0x70 [ 52.094280] ? __switch_to_asm+0x40/0x70 [ 52.098327] ? __schedule+0x874/0x1ed0 [ 52.102205] ? __switch_to_asm+0x34/0x70 [ 52.106250] ? __switch_to_asm+0x40/0x70 [ 52.110301] ? graph_lock+0x270/0x270 [ 52.114121] ? __sched_text_start+0x8/0x8 [ 52.118260] ? lockdep_hardirqs_on+0x421/0x5c0 [ 52.122848] ? lock_acquire+0x1ed/0x520 [ 52.126809] ? worker_thread+0x3e0/0x1390 [ 52.130945] ? kasan_check_read+0x11/0x20 [ 52.135078] ? do_raw_spin_lock+0x14f/0x350 [ 52.139420] ? kasan_check_read+0x11/0x20 [ 52.143552] ? rwlock_bug.part.2+0x90/0x90 [ 52.147769] ? trace_hardirqs_on+0x310/0x310 [ 52.152165] worker_thread+0x17f/0x1390 [ 52.156121] ? __switch_to_asm+0x34/0x70 [ 52.160181] ? __switch_to_asm+0x40/0x70 [ 52.164247] ? __switch_to_asm+0x34/0x70 [ 52.168313] ? process_one_work+0x1c40/0x1c40 [ 52.172798] ? graph_lock+0x270/0x270 [ 52.176662] ? find_held_lock+0x36/0x1c0 [ 52.180763] ? __kthread_parkme+0xce/0x1a0 [ 52.184988] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 52.190073] ? _raw_spin_unlock_irqrestore+0x82/0xd0 [ 52.195160] ? lockdep_hardirqs_on+0x421/0x5c0 [ 52.199739] ? trace_hardirqs_on+0xbd/0x310 [ 52.204047] ? kasan_check_read+0x11/0x20 [ 52.208194] ? __kthread_parkme+0xce/0x1a0 [ 52.212412] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 52.217867] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 52.223324] ? _raw_spin_unlock_irqrestore+0x6d/0xd0 [ 52.228415] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 52.233936] ? __kthread_parkme+0xfb/0x1a0 [ 52.238156] ? process_one_work+0x1c40/0x1c40 [ 52.242633] kthread+0x35a/0x440 [ 52.245982] ? kthread_bind+0x40/0x40 [ 52.249766] ret_from_fork+0x3a/0x50 [ 52.254416] Kernel Offset: disabled [ 52.258041] Rebooting in 86400 seconds..