[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.833722] random: sshd: uninitialized urandom read (32 bytes read, 35 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.774419] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 27.201065] random: sshd: uninitialized urandom read (32 bytes read, 42 bits of entropy available) [ 28.234544] random: sshd: uninitialized urandom read (32 bytes read, 127 bits of entropy available) [ 28.339340] random: nonblocking pool is initialized Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. 2018/03/23 06:19:35 parsed 1 programs 2018/03/23 06:19:35 executed programs: 0 [ 34.128510] IPVS: Creating netns size=2552 id=1 2018/03/23 06:19:40 executed programs: 281 2018/03/23 06:19:45 executed programs: 577 [ 44.494333] kasan: CONFIG_KASAN_INLINE enabled [ 44.498847] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 44.511651] Dumping ftrace buffer: [ 44.515156] (ftrace buffer empty) [ 44.518832] Modules linked in: [ 44.522110] CPU: 1 PID: 5619 Comm: syz-executor0 Not tainted 4.4.120-gd63fdf6 #28 [ 44.529696] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.539020] task: ffff8800b7769800 task.stack: ffff8800b95e0000 [ 44.545044] RIP: 0010:[] [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 44.554314] RSP: 0018:ffff8800b95e7b20 EFLAGS: 00010202 [ 44.559731] RAX: 1ffff1003acd344d RBX: ffff8801d669a258 RCX: 0000000000000001 [ 44.566966] RDX: 0000000000000008 RSI: 0000000000000000 RDI: ffff8801d4a914f4 [ 44.574204] RBP: ffff8800b95e7b70 R08: 0000000000000000 R09: 0000000000000001 [ 44.581439] R10: 0000000000000000 R11: 1ffff100172bcf3e R12: 0000000000000001 [ 44.588687] R13: 0000000000000008 R14: 0000000000000000 R15: dffffc0000000000 [ 44.595925] FS: 00007f9748d1b700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 44.604116] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.609966] CR2: 000000000072c000 CR3: 00000001d882e000 CR4: 0000000000160670 [ 44.617204] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.624442] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.631676] Stack: [ 44.633791] ffff8801d669a270 ffffed003acd344b ffffed003acd344e ffff8801d669a268 [ 44.641758] ffff8801d4a914d8 ffff8801d669a240 0000000000000000 0000000000000000 [ 44.649722] 0000000000000000 ffff8801d669a338 ffff8800b95e7bb0 ffffffff825b89d5 [ 44.657680] Call Trace: [ 44.660233] [] sg_finish_rem_req+0x2b5/0x340 [ 44.666257] [] sg_read+0xa1b/0x1490 [ 44.671499] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 44.678134] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 44.685112] [] ? sg_proc_seq_show_debug+0xda0/0xda0 [ 44.691749] [] __vfs_read+0x103/0x440 [ 44.697163] [] ? vfs_iter_write+0x2d0/0x2d0 [ 44.703102] [] ? fsnotify+0x5ad/0xee0 [ 44.708519] [] ? fsnotify+0xee0/0xee0 [ 44.713936] [] ? avc_policy_seqno+0x9/0x20 [ 44.719786] [] ? selinux_file_permission+0x348/0x460 [ 44.726506] [] ? security_file_permission+0x89/0x1e0 [ 44.733223] [] ? rw_verify_area+0x100/0x2f0 [ 44.739159] [] vfs_read+0x123/0x3a0 [ 44.744400] [] SyS_read+0xd9/0x1b0 [ 44.749557] [] ? do_sendfile+0xd30/0xd30 [ 44.755233] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 44.761692] [] entry_SYSCALL_64_fastpath+0x1c/0x98 [ 44.768233] Code: 45 b8 eb 3e e8 a7 87 da fe 48 8b 45 c8 48 c1 e8 03 42 80 3c 38 00 0f 85 3a 01 00 00 4c 8b 73 10 4b 8d 14 2e 48 89 d1 48 c1 e9 03 <42> 80 3c 39 00 0f 85 0b 01 00 00 48 8b 12 49 83 c5 08 48 85 d2 [ 44.794714] RIP [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 44.801639] RSP [ 44.805359] ---[ end trace 6d78a7308f6fff87 ]--- [ 44.810102] Kernel panic - not syncing: Fatal exception [ 44.815776] Dumping ftrace buffer: [ 44.819286] (ftrace buffer empty) [ 44.822963] Kernel Offset: disabled [ 44.826556] Rebooting in 86400 seconds..