[....] 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[ 10.566313] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 11.197790] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.134' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 30.033702] kasan: CONFIG_KASAN_INLINE enabled [ 30.034591] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 30.035719] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.037055] Modules linked in: [ 30.037590] CPU: 0 PID: 2044 Comm: syz-executor533 Not tainted 4.9.141+ #1 [ 30.038574] task: ffff8801d00cc740 task.stack: ffff8801cea68000 [ 30.039418] RIP: 0010:[] [] tcp_sendpage+0x35d/0x1910 [ 30.040612] RSP: 0018:ffff8801cea6f930 EFLAGS: 00010206 [ 30.041356] RAX: 000000000000000f RBX: 0000000000000000 RCX: 1ffff1003a27c2eb [ 30.042448] RDX: 0000000000000000 RSI: ffffffff824e0eab RDI: 0000000000000078 [ 30.043463] RBP: ffff8801cea6fa98 R08: ffff8801d00ccff0 R09: 0000000000000000 [ 30.044564] R10: 0000000000000000 R11: 0000000000000000 R12: 000000000000fd58 [ 30.045702] R13: ffff8801d42ec880 R14: ffff8801d13e1500 R15: dffffc0000000000 [ 30.046753] FS: 00007f58bb9e7700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000 [ 30.048016] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.048899] CR2: 0000000020020000 CR3: 00000001d10ba000 CR4: 00000000001606b0 [ 30.050000] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.051058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.052109] Stack: [ 30.052441] ffff8801cea6f940 ffffffff81243c87 0000000000000246 ffff8801d00cc740 [ 30.053680] ffffffff830cc2e0 fffffbfff067d37c 0000000000000000 ffff8801d00ccff0 [ 30.060986] ffffed003a0199fd 0000000000000000 ffff8801d13e18e8 ffff8801cea6f9f0 [ 30.068998] Call Trace: [ 30.071582] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 30.078314] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.084699] [] ? check_preemption_disabled+0x3b/0x200 [ 30.091531] [] ? inet_sendpage+0x14b/0x510 [ 30.097399] [] ? sk_stream_alloc_skb+0x5d0/0x5d0 [ 30.103784] [] inet_sendpage+0x221/0x510 [ 30.109472] [] ? inet_sendpage+0x7b/0x510 [ 30.115251] [] kernel_sendpage+0x93/0xf0 [ 30.120944] [] ? inet_getname+0x3b0/0x3b0 [ 30.126721] [] sock_sendpage+0x8c/0xc0 [ 30.132253] [] ? kernel_sendpage+0xf0/0xf0 [ 30.138130] [] pipe_to_sendpage+0x266/0x330 [ 30.144103] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.150772] [] ? splice_from_pipe_next.part.2+0x226/0x2e0 [ 30.157938] [] __splice_from_pipe+0x316/0x710 [ 30.164067] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.170719] [] splice_from_pipe+0xf9/0x170 [ 30.176587] [] ? generic_pipe_buf_nosteal+0x10/0x10 [ 30.183232] [] ? splice_shrink_spd+0xb0/0xb0 [ 30.189272] [] ? security_file_permission+0x8f/0x1e0 [ 30.196020] [] generic_splice_sendpage+0x3c/0x50 [ 30.202411] [] ? splice_from_pipe+0x170/0x170 [ 30.208536] [] SyS_splice+0xe4d/0x14d0 [ 30.214054] [] ? check_preemption_disabled+0x3b/0x200 [ 30.220871] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 30.227604] [] ? compat_SyS_vmsplice+0x160/0x160 [ 30.233989] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.240806] [] ? do_syscall_64+0x48/0x550 [ 30.246583] [] ? compat_SyS_vmsplice+0x160/0x160 [ 30.252973] [] do_syscall_64+0x19f/0x550 [ 30.258672] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 30.265573] Code: ff ff 48 0f 44 d8 e8 c3 ab e3 fe 4d 85 e4 0f 84 f0 04 00 00 e8 b5 ab e3 fe 48 8d 7b 78 44 8b a5 58 ff ff ff 48 89 f8 48 c1 e8 03 <42> 0f b6 04 38 84 c0 74 08 3c 03 0f 8e 06 11 00 00 44 2b 63 78 [ 30.292696] RIP [] tcp_sendpage+0x35d/0x1910 [ 30.298893] RSP [ 30.302561] ---[ end trace cbb814e2a57e6682 ]--- [ 30.307338] Kernel panic - not syncing: Fatal exception [ 30.313022] Kernel Offset: disabled [ 30.316642] Rebooting in 86400 seconds..