[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.741733] 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: [ 20.550017] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.785086] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.578817] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) [ 41.136259] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) Warning: Permanently added '10.128.15.239' (ECDSA) to the list of known hosts. [ 46.502752] random: sshd: uninitialized urandom read (32 bytes read, 114 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 [ 46.609330] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 47.302225] random: nonblocking pool is initialized [ 47.304738] kasan: CONFIG_KASAN_INLINE enabled [ 47.304745] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 47.304748] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 47.304752] Dumping ftrace buffer: [ 47.304755] (ftrace buffer empty) [ 47.304757] Modules linked in: [ 47.304762] CPU: 0 PID: 3343 Comm: syzkaller856581 Not tainted 4.4.111-gf851888 #16 [ 47.304765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.304768] task: ffff8801d0b98000 task.stack: ffff8801d5388000 [ 47.304781] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 47.304783] RSP: 0018:ffff8801d538f970 EFLAGS: 00010a07 [ 47.304786] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9e9b [ 47.304788] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 47.304790] RBP: ffff8801d538f980 R08: 0000000000000001 R09: 0000000000000000 [ 47.304792] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 47.304794] R13: 0000000000000020 R14: ffff8800b0b88000 R15: dffffc0000000000 [ 47.304798] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:000000000a0d4840 [ 47.304800] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 47.304802] CR2: 0000000020bb7000 CR3: 00000001d05fc000 CR4: 0000000000160670 [ 47.304807] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.304809] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 47.304810] Stack: [ 47.304814] 0000000000000000 ffff8800b0b88158 ffff8801d538f9e0 ffffffff825b9ec1 [ 47.304818] ffff8800b0b88170 ffffed001617102b ffffed001617102e ffff8800b0b88168 [ 47.304822] dead4ead00000000 ffff8800b0b88140 0000000000000000 0000000000000000 [ 47.304823] Call Trace: [ 47.304833] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 47.304837] [] sg_finish_rem_req+0x2b5/0x340 [ 47.304841] [] sg_new_read.isra.18+0x39/0x3c0 [ 47.304845] [] ? sg_get_rq_mark+0x142/0x190 [ 47.304849] [] sg_read+0x8c2/0x1490 [ 47.304853] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 47.304857] [] ? fsnotify+0xee0/0xee0 [ 47.304865] [] ? avc_policy_seqno+0x9/0x20 [ 47.304872] [] do_loop_readv_writev+0x141/0x1e0 [ 47.304876] [] ? security_file_permission+0x89/0x1e0 [ 47.304880] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 47.304884] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 47.304888] [] compat_do_readv_writev+0x5df/0x6e0 [ 47.304891] [] ? vfs_writev+0xb0/0xb0 [ 47.304897] [] ? _raw_spin_unlock+0x2c/0x50 [ 47.304904] [] ? handle_mm_fault+0x3f2/0x3190 [ 47.304907] [] ? rw_verify_area+0x100/0x2f0 [ 47.304911] [] compat_readv+0xd9/0x140 [ 47.304915] [] compat_SyS_readv+0xd8/0x1b0 [ 47.304918] [] ? SyS_pwritev+0x230/0x230 [ 47.304924] [] ? do_fast_syscall_32+0xd7/0x890 [ 47.304927] [] ? SyS_pwritev+0x230/0x230 [ 47.304930] [] do_fast_syscall_32+0x314/0x890 [ 47.304935] [] sysenter_flags_fixed+0xd/0x17 [ 47.304983] 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 [ 47.304986] RIP [] __free_pages+0x21/0x90 [ 47.304988] RSP [ 47.304992] ---[ end trace af70e00fbe33f756 ]--- [ 47.304995] Kernel panic - not syncing: Fatal exception [ 47.654905] Dumping ftrace buffer: [ 47.658445] (ftrace buffer empty) [ 47.662130] Kernel Offset: disabled [ 47.665731] Rebooting in 86400 seconds..