[ 45.135651] audit: type=1800 audit(1563763900.395:30): pid=7667 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 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: [ 49.846990] kauditd_printk_skb: 4 callbacks suppressed [ 49.847010] audit: type=1400 audit(1563763905.145:35): avc: denied { map } for pid=7840 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 '10.128.0.7' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 56.517122] audit: type=1400 audit(1563763911.815:36): avc: denied { map } for pid=7852 comm="syz-executor552" path="/root/syz-executor552808857" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 56.544671] 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 [ 56.624815] audit: type=1400 audit(1563763911.925:37): avc: denied { map } for pid=7865 comm="syz-executor552" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=27980 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 [ 56.657698] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program executing program [ 56.744362] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 56.824079] 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 [ 56.896138] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program [ 56.974888] 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 [ 57.091639] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program [ 57.164564] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 57.279113] 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 [ 57.388256] 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 [ 61.569713] net_ratelimit: 50 callbacks suppressed [ 61.569724] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program [ 61.668737] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. executing program executing program executing program executing program [ 61.770491] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 61.843072] ================================================================== [ 61.850654] BUG: KASAN: use-after-free in tls_push_record+0x102a/0x13a0 [ 61.857401] Write of size 1 at addr ffff888079028000 by task syz-executor552/8577 [ 61.865005] [ 61.866658] CPU: 0 PID: 8577 Comm: syz-executor552 Not tainted 4.19.60 #33 [ 61.873680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.883060] Call Trace: [ 61.885679] dump_stack+0x172/0x1f0 [ 61.889302] ? tls_push_record+0x102a/0x13a0 [ 61.893728] print_address_description.cold+0x7c/0x20d [ 61.899007] ? tls_push_record+0x102a/0x13a0 [ 61.903456] kasan_report.cold+0x8c/0x2ba [ 61.907634] __asan_report_store1_noabort+0x17/0x20 [ 61.912664] tls_push_record+0x102a/0x13a0 [ 61.916931] ? __local_bh_enable_ip+0x15a/0x270 [ 61.921621] ? lock_sock_nested+0x9a/0x120 [ 61.925877] tls_sw_push_pending_record+0x23/0x30 [ 61.930710] tls_sk_proto_close+0x5bb/0xa20 [ 61.935053] ? debug_object_activate+0x2c1/0x4e0 [ 61.939818] ? tcp_check_oom+0x560/0x560 [ 61.943890] ? tls_write_space+0x310/0x310 [ 61.948141] ? ip_mc_drop_socket+0x20c/0x270 [ 61.952547] ? __sock_release+0x89/0x2a0 [ 61.956604] inet_release+0xff/0x1e0 [ 61.960322] inet6_release+0x53/0x80 [ 61.964026] __sock_release+0xce/0x2a0 [ 61.967917] ? __sock_release+0x2a0/0x2a0 [ 61.972067] sock_close+0x1b/0x30 [ 61.975522] __fput+0x2dd/0x8b0 [ 61.978825] ____fput+0x16/0x20 [ 61.982106] task_work_run+0x145/0x1c0 [ 61.985990] do_exit+0x933/0x2fa0 [ 61.989447] ? _raw_spin_unlock_bh+0x31/0x40 [ 61.993848] ? get_signal+0x384/0x1fc0 [ 61.997742] ? mm_update_next_owner+0x660/0x660 [ 62.002444] ? _raw_spin_unlock_irq+0x28/0x90 [ 62.006929] ? get_signal+0x384/0x1fc0 [ 62.010804] ? _raw_spin_unlock_irq+0x28/0x90 [ 62.015294] do_group_exit+0x135/0x370 [ 62.019185] get_signal+0x3ec/0x1fc0 [ 62.022922] do_signal+0x95/0x1960 [ 62.026471] ? __ia32_sys_getpeername+0xb0/0xb0 [ 62.031129] ? _raw_spin_unlock_bh+0x31/0x40 [ 62.035559] ? setup_sigcontext+0x7d0/0x7d0 [ 62.039877] ? sk_stream_wait_memory+0xe60/0xe60 [ 62.044641] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 62.050184] ? __x64_sys_futex+0x40d/0x590 [ 62.054418] ? exit_to_usermode_loop+0x43/0x2c0 [ 62.059098] ? do_syscall_64+0x53d/0x620 [ 62.063155] ? exit_to_usermode_loop+0x43/0x2c0 [ 62.067817] ? lockdep_hardirqs_on+0x415/0x5d0 [ 62.072417] ? trace_hardirqs_on+0x67/0x220 [ 62.076742] exit_to_usermode_loop+0x244/0x2c0 [ 62.081327] do_syscall_64+0x53d/0x620 [ 62.085238] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.090412] RIP: 0033:0x4469a9 [ 62.093592] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.112579] RSP: 002b:00007faf5e004da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 62.120302] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 00000000004469a9 [ 62.127754] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 62.135025] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 62.142317] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 62.149582] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 62.156872] [ 62.158497] The buggy address belongs to the page: [ 62.163413] page:ffffea0001e40a00 count:0 mapcount:-128 mapping:0000000000000000 index:0x0 [ 62.171818] flags: 0x1fffc0000000000() [ 62.175702] raw: 01fffc0000000000 ffffea0002065608 ffffea0002646408 0000000000000000 [ 62.183576] raw: 0000000000000000 0000000000000003 00000000ffffff7f 0000000000000000 [ 62.191468] page dumped because: kasan: bad access detected [ 62.197178] [ 62.198790] Memory state around the buggy address: [ 62.203702] ffff888079027f00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 62.211086] ffff888079027f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 62.218439] >ffff888079028000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 62.225782] ^ [ 62.229138] ffff888079028080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 62.236583] ffff888079028100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff executing program executing program [ 62.243938] ================================================================== [ 62.251317] Disabling lock debugging due to kernel taint [ 62.262765] Kernel panic - not syncing: panic_on_warn set ... [ 62.262765] [ 62.266095] TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. [ 62.270184] CPU: 0 PID: 8577 Comm: syz-executor552 Tainted: G B 4.19.60 #33 [ 62.270192] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 62.270197] Call Trace: [ 62.270217] dump_stack+0x172/0x1f0 [ 62.270233] ? tls_push_record+0x102a/0x13a0 [ 62.270252] panic+0x263/0x507 [ 62.318548] ? __warn_printk+0xf3/0xf3 [ 62.322444] ? tls_push_record+0x102a/0x13a0 [ 62.326849] ? preempt_schedule+0x4b/0x60 [ 62.330999] ? ___preempt_schedule+0x16/0x18 [ 62.335410] ? trace_hardirqs_on+0x5e/0x220 [ 62.339732] ? tls_push_record+0x102a/0x13a0 [ 62.344141] kasan_end_report+0x47/0x4f [ 62.348129] kasan_report.cold+0xa9/0x2ba [ 62.352283] __asan_report_store1_noabort+0x17/0x20 [ 62.357298] tls_push_record+0x102a/0x13a0 [ 62.361530] ? __local_bh_enable_ip+0x15a/0x270 [ 62.366201] ? lock_sock_nested+0x9a/0x120 [ 62.370455] tls_sw_push_pending_record+0x23/0x30 [ 62.375297] tls_sk_proto_close+0x5bb/0xa20 [ 62.379617] ? debug_object_activate+0x2c1/0x4e0 [ 62.384370] ? tcp_check_oom+0x560/0x560 [ 62.388427] ? tls_write_space+0x310/0x310 [ 62.392661] ? ip_mc_drop_socket+0x20c/0x270 [ 62.397090] ? __sock_release+0x89/0x2a0 [ 62.401158] inet_release+0xff/0x1e0 [ 62.404882] inet6_release+0x53/0x80 [ 62.408715] __sock_release+0xce/0x2a0 [ 62.412610] ? __sock_release+0x2a0/0x2a0 [ 62.416850] sock_close+0x1b/0x30 [ 62.420336] __fput+0x2dd/0x8b0 [ 62.423748] ____fput+0x16/0x20 [ 62.427044] task_work_run+0x145/0x1c0 [ 62.430954] do_exit+0x933/0x2fa0 [ 62.434420] ? _raw_spin_unlock_bh+0x31/0x40 [ 62.438825] ? get_signal+0x384/0x1fc0 [ 62.442711] ? mm_update_next_owner+0x660/0x660 [ 62.447388] ? _raw_spin_unlock_irq+0x28/0x90 [ 62.451882] ? get_signal+0x384/0x1fc0 [ 62.455770] ? _raw_spin_unlock_irq+0x28/0x90 [ 62.460267] do_group_exit+0x135/0x370 [ 62.464155] get_signal+0x3ec/0x1fc0 [ 62.467871] do_signal+0x95/0x1960 [ 62.471431] ? __ia32_sys_getpeername+0xb0/0xb0 [ 62.476101] ? _raw_spin_unlock_bh+0x31/0x40 [ 62.480509] ? setup_sigcontext+0x7d0/0x7d0 [ 62.484827] ? sk_stream_wait_memory+0xe60/0xe60 [ 62.489589] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 62.495130] ? __x64_sys_futex+0x40d/0x590 [ 62.499371] ? exit_to_usermode_loop+0x43/0x2c0 [ 62.504046] ? do_syscall_64+0x53d/0x620 [ 62.508105] ? exit_to_usermode_loop+0x43/0x2c0 [ 62.512775] ? lockdep_hardirqs_on+0x415/0x5d0 [ 62.517366] ? trace_hardirqs_on+0x67/0x220 [ 62.521688] exit_to_usermode_loop+0x244/0x2c0 [ 62.526273] do_syscall_64+0x53d/0x620 [ 62.530162] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 62.535352] RIP: 0033:0x4469a9 [ 62.538544] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 5b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 62.557447] RSP: 002b:00007faf5e004da8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 62.565162] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 00000000004469a9 [ 62.572431] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 62.579711] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 62.586995] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 62.594262] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 62.602738] Kernel Offset: disabled [ 62.606463] Rebooting in 86400 seconds..