[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.431430] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.948185] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.267187] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.090326] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) [ 21.261739] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 26.661060] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 [ 26.775340] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.178876] kasan: CONFIG_KASAN_INLINE enabled [ 30.183398] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.196319] Dumping ftrace buffer: [ 30.199824] (ftrace buffer empty) [ 30.203500] Modules linked in: [ 30.206773] CPU: 0 PID: 3908 Comm: syzkaller162258 Not tainted 4.4.107-g610c835 #4 [ 30.214442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.223765] task: ffff8800b30d2f80 task.stack: ffff8800b3000000 [ 30.229783] RIP: 0010:[] [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 30.239060] RSP: 0018:ffff8800b30079e0 EFLAGS: 00010206 [ 30.244474] RAX: 1ffff1001663944d RBX: ffff8800b31ca258 RCX: 0000000000000003 [ 30.251711] RDX: 0000000000000018 RSI: 0000000000000000 RDI: ffff8800b7f2b91c [ 30.258953] RBP: ffff8800b3007a30 R08: 0000000000000000 R09: 0000000000000001 [ 30.266187] R10: 0000000000000000 R11: 1ffff10016600f16 R12: 0000000000000003 [ 30.273421] R13: 0000000000000018 R14: 0000000000000000 R15: dffffc0000000000 [ 30.280657] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7793b40 [ 30.288845] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.294692] CR2: 0000000020cb8fd0 CR3: 00000000b310f000 CR4: 00000000001406f0 [ 30.301935] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.309170] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.316404] Stack: [ 30.318517] ffff8800b31ca270 ffffed001663944b ffffed001663944e ffff8800b31ca268 [ 30.326469] ffff8800b7f2b900 ffff8800b31ca240 0000000000000000 0000000000000000 [ 30.334412] 0000000000000000 ffff8800b31ca338 ffff8800b3007a70 ffffffff825b90b5 [ 30.342365] Call Trace: [ 30.344918] [] sg_finish_rem_req+0x2b5/0x340 [ 30.350947] [] sg_read+0xa21/0x1490 [ 30.356197] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.362836] [] ? fsnotify+0xee0/0xee0 [ 30.368255] [] ? avc_policy_seqno+0x9/0x20 [ 30.374111] [] do_loop_readv_writev+0x141/0x1e0 [ 30.380394] [] ? security_file_permission+0x89/0x1e0 [ 30.387110] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.393743] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.400375] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.406832] [] ? vfs_writev+0xb0/0xb0 [ 30.412248] [] ? __fget+0x20b/0x3b0 [ 30.417504] [] ? __fget+0x232/0x3b0 [ 30.422746] [] ? __fget+0x47/0x3b0 [ 30.427913] [] compat_readv+0xd9/0x140 [ 30.433414] [] compat_SyS_readv+0xd8/0x1b0 [ 30.439263] [] ? SyS_pwritev+0x230/0x230 [ 30.444938] [] ? do_fast_syscall_32+0xd7/0x890 [ 30.451133] [] ? SyS_pwritev+0x230/0x230 [ 30.456807] [] do_fast_syscall_32+0x314/0x890 [ 30.462930] [] sysenter_flags_fixed+0xd/0x17 [ 30.468958] Code: 45 b8 eb 3e e8 a7 4e 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 [ 30.495839] RIP [] sg_remove_scat.isra.17+0x17b/0x2d0 [ 30.502776] RSP [ 30.506521] ---[ end trace 3ebde35bfbd051bb ]--- [ 30.511289] Kernel panic - not syncing: Fatal exception [ 30.516992] Dumping ftrace buffer: [ 30.520503] (ftrace buffer empty) [ 30.524179] Kernel Offset: disabled [ 30.527771] Rebooting in 86400 seconds..