[ 15.515247] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.060888] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.386497] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.191672] random: sshd: uninitialized urandom read (32 bytes read, 93 bits of entropy available) [ 37.166026] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) Warning: Permanently added '10.128.15.208' (ECDSA) to the list of known hosts. [ 42.561027] random: sshd: uninitialized urandom read (32 bytes read, 111 bits of entropy available) executing program [ 42.653811] kasan: CONFIG_KASAN_INLINE enabled [ 42.658446] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.671231] Dumping ftrace buffer: [ 42.674734] (ftrace buffer empty) [ 42.678408] Modules linked in: [ 42.681675] CPU: 1 PID: 3326 Comm: syzkaller207642 Not tainted 4.4.107-g610c835 #12 [ 42.689442] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.698761] task: ffff8801cd682f80 task.stack: ffff8801d0168000 [ 42.704782] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 42.712843] RSP: 0018:ffff8801d016fbc0 EFLAGS: 00010246 [ 42.718259] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bb194 [ 42.725493] RDX: 0000000000000000 RSI: 0000000020185f5a RDI: ffff8801ccdcc370 [ 42.732731] RBP: ffff8801d016fcd0 R08: 53054a2135708f0e R09: 0000000000000001 [ 42.740055] R10: 0000000000000000 R11: 1ffff1003a02df3e R12: 00000000000000a6 [ 42.747296] R13: 0000000000000000 R14: ffff8800b4501ba0 R15: ffff8801ccdcc340 [ 42.754534] FS: 0000000001351880(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 42.762725] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.768573] CR2: 00000000209f0000 CR3: 00000000b52ef000 CR4: 00000000001406e0 [ 42.775809] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.783043] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.790289] Stack: [ 42.792408] ffff8800b3ca7a00 ffff8801d016fc08 ffffffff81d63d8b ffff8801ccdcc358 [ 42.800354] ffffffff84411e40 ffff8801ccdcc368 00000000000000ca ffff8801cd682f80 [ 42.808293] ffff8801d5745180 0000000000001000 1ffff1003a02df84 0000000020185f5a [ 42.816238] Call Trace: [ 42.818789] [] ? check_preemption_disabled+0x3b/0x200 [ 42.825601] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 42.832232] [] ? do_readv_writev+0x34d/0x6e0 [ 42.838271] [] ? rcu_read_lock_sched_held+0x103/0x120 [ 42.845075] [] ? kfree+0x1a4/0x300 [ 42.850230] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 42.856872] [] __vfs_read+0x103/0x440 [ 42.862286] [] ? vfs_iter_write+0x2d0/0x2d0 [ 42.868223] [] ? fsnotify+0x5ad/0xee0 [ 42.873636] [] ? fsnotify+0xee0/0xee0 [ 42.879049] [] ? avc_policy_seqno+0x9/0x20 [ 42.884898] [] ? selinux_file_permission+0x348/0x460 [ 42.891623] [] ? security_file_permission+0x89/0x1e0 [ 42.898347] [] ? rw_verify_area+0x100/0x2f0 [ 42.904282] [] vfs_read+0x123/0x3a0 [ 42.909523] [] SyS_read+0xd9/0x1b0 [ 42.914678] [] ? do_sendfile+0xd30/0xd30 [ 42.920352] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 42.926808] [] entry_SYSCALL_64_fastpath+0x16/0x76 [ 42.933348] Code: 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 97 06 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 5f 28 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 6b 06 00 00 48 8b 1b 48 85 db 0f 84 3b 03 00 [ 42.959609] RIP [] sg_read+0xd1d/0x1490 [ 42.965307] RSP [ 42.972452] ---[ end trace 05b319ea0152e8fa ]--- [ 42.977688] Kernel panic - not syncing: Fatal exception [ 42.983399] Dumping ftrace buffer: [ 42.986906] (ftrace buffer empty) [ 42.990583] Kernel Offset: disabled [ 42.994176] Rebooting in 86400 seconds..