[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.928777] 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: [ 20.172821] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.416785] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.215830] random: sshd: uninitialized urandom read (32 bytes read, 94 bits of entropy available) [ 21.378469] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) Warning: Permanently added '10.128.15.230' (ECDSA) to the list of known hosts. [ 26.805606] random: sshd: uninitialized urandom read (32 bytes read, 104 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 [ 27.547990] kasan: CONFIG_KASAN_INLINE enabled [ 27.572967] kasan: GPF could be caused by NULL-ptr deref or user memory accesskasan: CONFIG_KASAN_INLINE enabled [ 27.574085] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.574090] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.574094] Dumping ftrace buffer: [ 27.574097] (ftrace buffer empty) [ 27.574100] Modules linked in: [ 27.574107] CPU: 1 PID: 3325 Comm: syzkaller813429 Not tainted 4.4.107-g610c835 #4 [ 27.574110] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.574114] task: ffff8800b5094740 task.stack: ffff8801d12b0000 [ 27.574132] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 27.574136] RSP: 0018:ffff8801d12b7970 EFLAGS: 00010a07 [ 27.574139] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 27.574143] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 27.574146] RBP: ffff8801d12b7980 R08: 0000000000000001 R09: 0000000000000000 [ 27.574149] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 27.574153] R13: 0000000000000020 R14: ffff8801cc54a100 R15: dffffc0000000000 [ 27.574158] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000088e0840 [ 27.574162] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 27.574165] CR2: 0000000020a77fc0 CR3: 00000001d25c8000 CR4: 00000000001406e0 [ 27.574171] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.574174] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.574176] Stack: [ 27.574183] 0000000000000000 ffff8801cc54a258 ffff8801d12b79e0 ffffffff825b8cf1 [ 27.574190] ffff8801cc54a270 ffffed00398a944b ffffed00398a944e ffff8801cc54a268 [ 27.574197] dead4ead00000000 ffff8801cc54a240 0000000000000000 0000000000000000 [ 27.574199] Call Trace: [ 27.574209] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 27.574216] [] sg_finish_rem_req+0x2b5/0x340 [ 27.574222] [] sg_new_read.isra.18+0x39/0x3c0 [ 27.574228] [] ? sg_get_rq_mark+0x142/0x190 [ 27.574235] [] sg_read+0x8c2/0x1490 [ 27.574242] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.574247] [] ? fsnotify+0xee0/0xee0 [ 27.574257] [] ? avc_policy_seqno+0x9/0x20 [ 27.574266] [] do_loop_readv_writev+0x141/0x1e0 [ 27.574272] [] ? security_file_permission+0x89/0x1e0 [ 27.574279] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.574285] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.574291] [] compat_do_readv_writev+0x5df/0x6e0 [ 27.574298] [] ? vfs_writev+0xb0/0xb0 [ 27.574305] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.574313] [] ? handle_mm_fault+0x3f2/0x3190 [ 27.574319] [] ? rw_verify_area+0x100/0x2f0 [ 27.574326] [] compat_readv+0xd9/0x140 [ 27.574332] [] compat_SyS_readv+0xd8/0x1b0 [ 27.574337] [] ? SyS_pwritev+0x230/0x230 [ 27.574344] [] ? do_fast_syscall_32+0xd7/0x890 [ 27.574349] [] ? SyS_pwritev+0x230/0x230 [ 27.574354] [] do_fast_syscall_32+0x314/0x890 [ 27.574361] [] sysenter_flags_fixed+0xd/0x17 [ 27.574448] Code: 76 ae 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 [ 27.574454] RIP [] __free_pages+0x21/0x90 [ 27.574456] RSP [ 27.574461] ---[ end trace b976914515f939ad ]--- [ 27.574465] Kernel panic - not syncing: Fatal exception [ 27.581365] Dumping ftrace buffer: [ 27.581368] (ftrace buffer empty) [ 27.581370] Kernel Offset: disabled [ 27.943907] Rebooting in 86400 seconds..