[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 6.015222] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.436887] random: sshd: uninitialized urandom read (32 bytes read) [ 19.892079] random: sshd: uninitialized urandom read (32 bytes read) [ 20.166433] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.6' (ECDSA) to the list of known hosts. [ 25.669069] urandom_read: 1 callbacks suppressed [ 25.669070] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 25.736348] FAULT_INJECTION: forcing a failure. [ 25.736348] name failslab, interval 1, probability 0, space 0, times 1 [ 25.747567] CPU: 1 PID: 4068 Comm: syz-executor107 Not tainted 4.18.0-rc8+ #32 [ 25.754920] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.764250] Call Trace: [ 25.766819] dump_stack+0xae/0xf0 [ 25.770258] should_fail+0x144/0x230 [ 25.773953] ? __should_failslab+0x67/0x90 [ 25.778201] __should_failslab+0x7e/0x90 [ 25.782245] should_failslab+0x9/0x20 [ 25.786033] __kmalloc+0x61/0x250 [ 25.789465] tls_push_record+0x48/0x470 [ 25.793587] tls_sw_sendmsg+0x53c/0x6e0 [ 25.797542] inet_sendmsg+0xf5/0x170 [ 25.801242] __sys_sendto+0x176/0x1f0 [ 25.805023] ? __vfs_write+0x49/0x1e0 [ 25.808799] ? fsnotify+0x1be/0x620 [ 25.812399] ? prepare_exit_to_usermode+0x68/0x170 [ 25.817306] __x64_sys_sendto+0x28/0x30 [ 25.821267] do_syscall_64+0x61/0x90 [ 25.824966] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 25.830128] RIP: 0033:0x440589 [ 25.833288] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 25.852287] RSP: 002b:00007fffa9248ef8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c [ 25.860069] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000440589 [ 25.867311] RDX: 00000000fffffdef RSI: 00000000200005c0 RDI: 0000000000000004 [ 25.874555] RBP: 00000000006cb018 R08: 0000000020000000 R09: 000000000000001c [ 25.881799] R10: 0000000000000040 R11: 0000000000000212 R12: 0000000000000005 [ 25.889172] R13: ffffffffffffffff R14: 0000000000000000 R15: 0000000000000000 [ 25.896794] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008 [ 25.904756] PGD 800000021226e067 P4D 800000021226e067 PUD 21226c067 PMD 0 [ 25.911748] Oops: 0000 [#1] SMP PTI [ 25.915385] CPU: 1 PID: 4068 Comm: syz-executor107 Not tainted 4.18.0-rc8+ #32 [ 25.922721] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.932053] RIP: 0010:tls_push_sg+0xfa/0x220 [ 25.936431] Code: ee 49 29 df 48 8b 7d c0 4c 89 e6 44 89 f2 4c 89 f9 44 8b 45 d0 e8 e6 10 f6 ff 49 89 c5 49 63 dd 49 39 df 75 cb e8 f6 ac c1 fe <49> 8b 44 24 08 a8 01 4c 8b 75 c0 0f 85 80 00 00 00 c6 45 d7 00 f0 [ 25.955433] RSP: 0018:ffff8802030bfc30 EFLAGS: 00010293 [ 25.960808] RAX: ffffffff825500ff RBX: 0000000000000000 RCX: ffff880203255280 [ 25.968176] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880212228200 [ 25.975422] RBP: ffff8802030bfc80 R08: 0000000000020000 R09: ffff8802152c9600 [ 25.982773] R10: ffff88021237c400 R11: ffffffff825a3b40 R12: 0000000000000000 [ 25.990134] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 25.997380] FS: 00000000022ac880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 26.005591] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.011509] CR2: 0000000000000008 CR3: 0000000212242000 CR4: 00000000001406e0 [ 26.018761] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.026018] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.033275] Call Trace: [ 26.035839] tls_push_record+0x390/0x470 [ 26.039889] ? _cond_resched+0x17/0x60 [ 26.043763] ? lock_sock_nested+0xd4/0xf0 [ 26.047893] ? tcp_check_oom+0x130/0x130 [ 26.051928] tls_sw_push_pending_record+0x22/0x30 [ 26.056748] tls_sk_proto_close+0x117/0x310 [ 26.061057] inet_release+0x7e/0x90 [ 26.064746] inet6_release+0x35/0x50 [ 26.068672] sock_close+0x48/0xd0 [ 26.072103] ? sock_mmap+0x40/0x40 [ 26.075621] __fput+0x110/0x280 [ 26.078877] ____fput+0x15/0x20 [ 26.082175] task_work_run+0xb4/0xe0 [ 26.086060] do_exit+0x3a7/0xd70 [ 26.089465] ? syscall_return_slowpath+0x3f/0x270 [ 26.094340] do_group_exit+0x68/0xf0 [ 26.098036] __do_sys_exit_group+0xf/0x10 [ 26.102163] __se_sys_exit_group+0x9/0x10 [ 26.106323] __x64_sys_exit_group+0xd/0x10 [ 26.110543] do_syscall_64+0x61/0x90 [ 26.114282] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 26.119447] RIP: 0033:0x43f248 [ 26.122610] Code: 14 24 89 5d 00 41 8d 4c 48 d0 74 13 44 0f b6 02 4c 8b 08 45 0f b6 d0 43 f6 44 51 01 08 75 d3 5b 5d 89 c8 41 5c c3 31 c9 eb f5 <0f> 1f 84 00 00 00 00 00 48 89 6c 24 d8 4c 89 64 24 e0 48 89 d5 48 [ 26.141607] RSP: 002b:00007fffa9248f18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 26.149289] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000043f248 [ 26.156533] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 26.163776] RBP: 00000000004befa8 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 26.171031] R10: 0000000000000040 R11: 0000000000000246 R12: 0000000000000001 [ 26.178282] R13: 00000000006d1180 R14: 0000000000000000 R15: 0000000000000000 [ 26.185594] Modules linked in: [ 26.188787] Dumping ftrace buffer: [ 26.192303] (ftrace buffer empty) [ 26.196058] CR2: 0000000000000008 [ 26.199487] ---[ end trace fa8a8d710ea4aa07 ]--- [ 26.204218] RIP: 0010:tls_push_sg+0xfa/0x220 [ 26.208596] Code: ee 49 29 df 48 8b 7d c0 4c 89 e6 44 89 f2 4c 89 f9 44 8b 45 d0 e8 e6 10 f6 ff 49 89 c5 49 63 dd 49 39 df 75 cb e8 f6 ac c1 fe <49> 8b 44 24 08 a8 01 4c 8b 75 c0 0f 85 80 00 00 00 c6 45 d7 00 f0 [ 26.227688] RSP: 0018:ffff8802030bfc30 EFLAGS: 00010293 [ 26.233039] RAX: ffffffff825500ff RBX: 0000000000000000 RCX: ffff880203255280 [ 26.240461] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff880212228200 [ 26.247705] RBP: ffff8802030bfc80 R08: 0000000000020000 R09: ffff8802152c9600 [ 26.254956] R10: ffff88021237c400 R11: ffffffff825a3b40 R12: 0000000000000000 [ 26.262241] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 26.269492] FS: 00000000022ac880(0000) GS:ffff88021fd00000(0000) knlGS:0000000000000000 [ 26.277782] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 26.283647] CR2: 0000000000000008 CR3: 0000000212242000 CR4: 00000000001406e0 [ 26.290944] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 26.298196] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 26.305442] Kernel panic - not syncing: Fatal exception [ 26.311216] Dumping ftrace buffer: [ 26.314738] (ftrace buffer empty) [ 26.318419] Kernel Offset: disabled [ 26.322018] Rebooting in 86400 seconds..