[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.646772] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.954773] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.125884] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.007840] random: sshd: uninitialized urandom read (32 bytes read, 107 bits of entropy available) [ 36.619842] random: sshd: uninitialized urandom read (32 bytes read, 118 bits of entropy available) Warning: Permanently added '10.128.15.210' (ECDSA) to the list of known hosts. [ 41.997454] random: sshd: uninitialized urandom read (32 bytes read, 124 bits of entropy available) executing program [ 42.082527] kasan: CONFIG_KASAN_INLINE enabled [ 42.086949] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 42.099954] Dumping ftrace buffer: [ 42.103462] (ftrace buffer empty) [ 42.107139] Modules linked in: [ 42.110427] CPU: 0 PID: 3321 Comm: syzkaller632979 Not tainted 4.4.111-gc2f631b #27 [ 42.118184] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.127507] task: ffff8800b46baf80 task.stack: ffff8801d0880000 [ 42.133529] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 42.141757] RSP: 0018:ffff8801d08879f0 EFLAGS: 00010a07 [ 42.147172] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9f5b [ 42.154411] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 42.161648] RBP: ffff8801d0887a00 R08: 0000000000000001 R09: 0000000000000001 [ 42.168882] R10: 0000000000000000 R11: 1ffff1003a110f1c R12: 0000000000000004 [ 42.176119] R13: 0000000000000020 R14: ffff8801d008a100 R15: dffffc0000000000 [ 42.183356] FS: 0000000001fd2880(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 42.191548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.197395] CR2: 000000000043e5b0 CR3: 00000001d2346000 CR4: 0000000000160670 [ 42.204634] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.211870] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.219105] Stack: [ 42.221220] 0000000000000246 ffff8801d008a258 ffff8801d0887a60 ffffffff825b9f81 [ 42.229174] ffff8801d008a270 ffffed003a01144b ffffed003a01144e ffff8801d008a268 [ 42.237133] dead4ead00000000 ffff8801d008a240 0000000000000000 0000000000000000 [ 42.245087] Call Trace: [ 42.247643] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 42.254102] [] sg_finish_rem_req+0x2b5/0x340 [ 42.260128] [] sg_new_read.isra.18+0x336/0x3c0 [ 42.266325] [] sg_read+0x8c2/0x1490 [ 42.271569] [] ? __check_object_size+0x154/0x35b [ 42.277942] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 42.284577] [] ? fsnotify+0xee0/0xee0 [ 42.289995] [] ? avc_policy_seqno+0x9/0x20 [ 42.295857] [] do_loop_readv_writev+0x141/0x1e0 [ 42.302150] [] ? security_file_permission+0x89/0x1e0 [ 42.308867] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 42.315502] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 42.322132] [] do_readv_writev+0x5dd/0x6e0 [ 42.327989] [] ? vfs_write+0x530/0x530 [ 42.333495] [] ? sg_ioctl+0x2c20/0x2c20 [ 42.339083] [] ? __vfs_write+0x10b/0x450 [ 42.344760] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 42.351650] [] ? quarantine_put+0xab/0x180 [ 42.357500] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 42.364304] [] ? __fsnotify_parent+0xbc/0x340 [ 42.370416] [] ? avc_policy_seqno+0x9/0x20 [ 42.376270] [] ? fsnotify+0x5ad/0xee0 [ 42.381685] [] ? fsnotify+0xee0/0xee0 [ 42.387102] [] ? rw_verify_area+0x100/0x2f0 [ 42.393038] [] vfs_readv+0x78/0xb0 [ 42.398194] [] SyS_readv+0xd9/0x240 [ 42.403438] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 42.409985] [] ? lockdep_sys_exit_thunk+0x12/0x14 [ 42.416446] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 42.422987] 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 [ 42.449468] RIP [] __free_pages+0x21/0x90 [ 42.455348] RSP [ 42.459034] ---[ end trace c8a625293f2e02c2 ]--- [ 42.463762] Kernel panic - not syncing: Fatal exception [ 42.469443] Dumping ftrace buffer: [ 42.472956] (ftrace buffer empty) [ 42.476632] Kernel Offset: disabled [ 42.480225] Rebooting in 86400 seconds..