[ 15.329721] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.700084] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 21.904464] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.688723] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 38.390663] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.15.245' (ECDSA) to the list of known hosts. [ 43.773550] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) executing program [ 43.887010] kasan: CONFIG_KASAN_INLINE enabled [ 43.891693] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.904514] Dumping ftrace buffer: [ 43.908026] (ftrace buffer empty) [ 43.911703] Modules linked in: [ 43.914977] CPU: 0 PID: 3324 Comm: syzkaller648676 Not tainted 4.4.107-g610c835 #4 [ 43.922649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.931972] task: ffff8800b66a0000 task.stack: ffff8800b41a0000 [ 43.937989] RIP: 0010:[] [] sg_read+0xd1d/0x1490 [ 43.946050] RSP: 0018:ffff8800b41a7a80 EFLAGS: 00010246 [ 43.951465] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff825bb194 [ 43.958699] RDX: 0000000000000000 RSI: 00000000200c1024 RDI: ffff8801d10ac370 [ 43.965935] RBP: ffff8800b41a7b88 R08: 8551c99c2a45b4bd R09: 0000000000000001 [ 43.973173] R10: 0000000000000000 R11: 1ffff10016834f16 R12: 00000000000000a8 [ 43.980409] R13: 0000000000000000 R14: ffff8800b46e35a0 R15: ffff8801d10ac340 [ 43.987647] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008259840 [ 43.995838] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 44.001695] CR2: 00000000205f2f80 CR3: 00000000b5684000 CR4: 00000000001406f0 [ 44.008934] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.016169] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.023410] Stack: [ 44.025527] 0000000000000002 0000000000000002 ffff8800b41a7c40 ffff8801d10ac358 [ 44.033475] 66d2c04410a0ba7d ffff8801d10ac368 00000000000000cc 00000000c454cd53 [ 44.041427] ffff8801d56bd680 0000000000001000 1ffff10016834f5c 00000000200c1024 [ 44.049370] Call Trace: [ 44.051930] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 44.058561] [] ? fsnotify+0xee0/0xee0 [ 44.063980] [] ? avc_policy_seqno+0x9/0x20 [ 44.069833] [] do_loop_readv_writev+0x141/0x1e0 [ 44.076116] [] ? security_file_permission+0x89/0x1e0 [ 44.082832] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 44.089461] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 44.096092] [] compat_do_readv_writev+0x5df/0x6e0 [ 44.102548] [] ? vfs_writev+0xb0/0xb0 [ 44.107963] [] ? _raw_spin_unlock+0x2c/0x50 [ 44.113898] [] ? rw_verify_area+0x100/0x2f0 [ 44.119832] [] compat_readv+0xd9/0x140 [ 44.125331] [] compat_SyS_readv+0xd8/0x1b0 [ 44.131187] [] ? SyS_pwritev+0x230/0x230 [ 44.136861] [] ? do_fast_syscall_32+0xd7/0x890 [ 44.143055] [] ? SyS_pwritev+0x230/0x230 [ 44.148735] [] do_fast_syscall_32+0x314/0x890 [ 44.154845] [] sysenter_flags_fixed+0xd/0x17 [ 44.160869] 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 [ 44.187142] RIP [] sg_read+0xd1d/0x1490 [ 44.192857] RSP [ 44.198872] ---[ end trace ed2b78e838992f6d ]--- [ 44.203615] Kernel panic - not syncing: Fatal exception [ 44.208986] Dumping ftrace buffer: [ 44.212496] (ftrace buffer empty) [ 44.216177] Kernel Offset: disabled [ 44.219770] Rebooting in 86400 seconds..