[ 16.155331] 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: [ 21.045099] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.408162] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.081063] random: sshd: uninitialized urandom read (32 bytes read, 73 bits of entropy available) [ 54.679957] random: sshd: uninitialized urandom read (32 bytes read, 92 bits of entropy available) Warning: Permanently added '10.128.0.18' (ECDSA) to the list of known hosts. [ 60.084622] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) [ 60.209735] 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 [ 60.235152] IPVS: Creating netns size=2552 id=2 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.294384] IPVS: Creating netns size=2552 id=3 [ 60.295964] kasan: CONFIG_KASAN_INLINE enabled [ 60.295970] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 60.295973] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 60.295977] Dumping ftrace buffer: [ 60.295979] (ftrace buffer empty) [ 60.295982] Modules linked in: [ 60.295988] CPU: 0 PID: 3355 Comm: syzkaller025694 Not tainted 4.4.111-g7902639 #25 [ 60.295990] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.295992] task: ffff8800b4a317c0 task.stack: ffff8800b41e8000 [ 60.296003] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 60.296005] RSP: 0018:ffff8800b41ef9f0 EFLAGS: 00010a07 [ 60.296008] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 60.296010] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 60.296012] RBP: ffff8800b41efa00 R08: 0000000000000001 R09: 0000000000000000 [ 60.296014] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 60.296016] R13: 0000000000000020 R14: ffff8800b3d58000 R15: dffffc0000000000 [ 60.296019] FS: 00000000017bb880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 60.296021] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.296023] CR2: 0000000020977000 CR3: 00000000b5374000 CR4: 0000000000160670 [ 60.296028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.296030] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.296031] Stack: [ 60.296035] 0000000000000000 ffff8800b3d58158 ffff8800b41efa60 ffffffff825b9ee1 [ 60.296039] ffff8800b3d58170 ffffed00167ab02b ffffed00167ab02e ffff8800b3d58168 [ 60.296043] dead4ead00000000 ffff8800b3d58140 0000000000000000 0000000000000000 [ 60.296044] Call Trace: [ 60.296051] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 60.296055] [] sg_finish_rem_req+0x2b5/0x340 [ 60.296059] [] sg_new_read.isra.18+0x39/0x3c0 [ 60.296063] [] ? sg_get_rq_mark+0x142/0x190 [ 60.296066] [] sg_read+0x8c2/0x1490 [ 60.296072] [] ? __check_object_size+0x154/0x35b [ 60.296076] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 60.296080] [] ? fsnotify+0xee0/0xee0 [ 60.296087] [] ? avc_policy_seqno+0x9/0x20 [ 60.296091] [] do_loop_readv_writev+0x141/0x1e0 [ 60.296095] [] ? security_file_permission+0x89/0x1e0 [ 60.296099] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 60.296103] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 60.296107] [] do_readv_writev+0x5dd/0x6e0 [ 60.296111] [] ? vfs_write+0x530/0x530 [ 60.296115] [] ? _raw_spin_unlock+0x2c/0x50 [ 60.296119] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 60.296125] [] ? handle_mm_fault+0x3f2/0x3190 [ 60.296130] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 60.296134] [] vfs_readv+0x78/0xb0 [ 60.296138] [] SyS_readv+0xd9/0x240 [ 60.296141] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 60.296145] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 60.296149] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 60.296197] 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 [ 60.296200] RIP [] __free_pages+0x21/0x90 [ 60.296202] RSP [ 60.296207] ---[ end trace 1093fa71bd5a345c ]--- [ 60.296209] Kernel panic - not syncing: Fatal exception [ 60.299436] Dumping ftrace buffer: [ 60.299437] (ftrace buffer empty) [ 60.299439] Kernel Offset: disabled [ 60.660487] Rebooting in 86400 seconds..