[....] Starting file context mai[ 16.477156] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) ntaining 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: [ 21.097201] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.474624] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.231591] random: sshd: uninitialized urandom read (32 bytes read, 87 bits of entropy available) [ 45.850198] random: sshd: uninitialized urandom read (32 bytes read, 103 bits of entropy available) Warning: Permanently added '10.128.15.212' (ECDSA) to the list of known hosts. [ 51.262969] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) 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 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 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 [ 52.629070] random: nonblocking pool is initialized [ 52.633072] kasan: CONFIG_KASAN_INLINE enabled [ 52.633079] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 52.633081] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 52.633084] Dumping ftrace buffer: [ 52.633087] (ftrace buffer empty) [ 52.633089] Modules linked in: [ 52.633094] CPU: 0 PID: 3332 Comm: syzkaller551916 Not tainted 4.4.111-g7902639 #18 [ 52.633096] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.633099] task: ffff8801d13c4740 task.stack: ffff8800b3c90000 [ 52.633109] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 52.633111] RSP: 0018:ffff8800b3c97970 EFLAGS: 00010a07 [ 52.633113] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 52.633116] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 52.633118] RBP: ffff8800b3c97980 R08: 0000000000000001 R09: 0000000000000000 [ 52.633120] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 52.633122] R13: 0000000000000020 R14: ffff8800b3dc8000 R15: dffffc0000000000 [ 52.633125] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000081c5900 [ 52.633127] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 52.633129] CR2: 00000000204e9fd0 CR3: 00000000b45e2000 CR4: 0000000000160670 [ 52.633134] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.633136] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.633136] Stack: [ 52.633141] 0000000000000000 ffff8800b3dc8158 ffff8800b3c979e0 ffffffff825b9ee1 [ 52.633145] ffff8800b3dc8170 ffffed00167b902b ffffed00167b902e ffff8800b3dc8168 [ 52.633149] dead4ead00000000 ffff8800b3dc8140 0000000000000000 0000000000000000 [ 52.633150] Call Trace: [ 52.633157] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 52.633160] [] sg_finish_rem_req+0x2b5/0x340 [ 52.633165] [] sg_new_read.isra.18+0x39/0x3c0 [ 52.633168] [] ? sg_get_rq_mark+0x142/0x190 [ 52.633172] [] sg_read+0x8c2/0x1490 [ 52.633176] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 52.633180] [] ? fsnotify+0xee0/0xee0 [ 52.633187] [] ? avc_policy_seqno+0x9/0x20 [ 52.633193] [] do_loop_readv_writev+0x141/0x1e0 [ 52.633197] [] ? security_file_permission+0x89/0x1e0 [ 52.633201] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 52.633204] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 52.633209] [] compat_do_readv_writev+0x5df/0x6e0 [ 52.633212] [] ? vfs_writev+0xb0/0xb0 [ 52.633217] [] ? _raw_spin_unlock+0x2c/0x50 [ 52.633223] [] ? handle_mm_fault+0x3f2/0x3190 [ 52.633226] [] ? rw_verify_area+0x100/0x2f0 [ 52.633230] [] compat_readv+0xd9/0x140 [ 52.633234] [] compat_SyS_readv+0xd8/0x1b0 [ 52.633237] [] ? SyS_pwritev+0x230/0x230 [ 52.633242] [] ? do_fast_syscall_32+0xd7/0x890 [ 52.633245] [] ? SyS_pwritev+0x230/0x230 [ 52.633248] [] do_fast_syscall_32+0x314/0x890 [ 52.633253] [] sysenter_flags_fixed+0xd/0x17 [ 52.633300] Code: 96 a4 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 52.633304] RIP [] __free_pages+0x21/0x90 [ 52.633305] RSP [ 52.633310] ---[ end trace 376568375a77baef ]--- [ 52.633313] Kernel panic - not syncing: Fatal exception [ 52.982084] Dumping ftrace buffer: [ 52.985678] (ftrace buffer empty) [ 52.989361] Kernel Offset: disabled [ 52.992957] Rebooting in 86400 seconds..