[ 16.977618] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [....] Starting file context maintaining 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: [ 22.217779] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 22.667642] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 23.517392] random: sshd: uninitialized urandom read (32 bytes read, 100 bits of entropy available) [ 23.768803] random: sshd: uninitialized urandom read (32 bytes read, 104 bits of entropy available) Warning: Permanently added '10.128.15.241' (ECDSA) to the list of known hosts. [ 29.231510] random: sshd: uninitialized urandom read (32 bytes read, 112 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 [ 30.379218] random: nonblocking pool is initialized executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.711731] kasan: CONFIG_KASAN_INLINE enabled [ 30.716146] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.728943] Dumping ftrace buffer: [ 30.732445] (ftrace buffer empty) [ 30.736121] Modules linked in: [ 30.739390] CPU: 0 PID: 3318 Comm: syzkaller319567 Not tainted 4.4.111-g7902639 #18 [ 30.747145] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.756476] task: ffff8801d0e1c740 task.stack: ffff8800b4730000 [ 30.762498] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.770724] RSP: 0018:ffff8800b4737970 EFLAGS: 00010a07 [ 30.776146] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 30.783387] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 30.790625] RBP: ffff8800b4737980 R08: 0000000000000001 R09: 0000000000000001 [ 30.797860] R10: 0000000000000000 R11: 1ffff100168e6f0c R12: 0000000000000004 [ 30.805102] R13: 0000000000000020 R14: ffff8800b0f6c200 R15: dffffc0000000000 [ 30.813380] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000009519840 [ 30.821571] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.827417] CR2: 0000000020dc8000 CR3: 00000000b632c000 CR4: 0000000000160670 [ 30.834652] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.841898] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.849132] Stack: [ 30.851244] ffffffff837764a9 ffff8800b0f6c358 ffff8800b47379e0 ffffffff825b9ee1 [ 30.859188] ffff8800b0f6c370 ffffed00161ed86b ffffed00161ed86e ffff8800b0f6c368 [ 30.867129] dead4ead00000000 ffff8800b0f6c340 0000000000000000 0000000000000000 [ 30.875070] Call Trace: [ 30.877625] [] ? retint_kernel+0x2d/0x2d [ 30.883302] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.889757] [] sg_finish_rem_req+0x2b5/0x340 [ 30.895783] [] sg_new_read.isra.18+0x336/0x3c0 [ 30.901977] [] sg_read+0x8c2/0x1490 [ 30.907216] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.913845] [] ? fsnotify+0xee0/0xee0 [ 30.919261] [] ? avc_policy_seqno+0x9/0x20 [ 30.925110] [] do_loop_readv_writev+0x141/0x1e0 [ 30.931390] [] ? security_file_permission+0x89/0x1e0 [ 30.938105] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.944733] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.951376] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.957830] [] ? vfs_writev+0xb0/0xb0 [ 30.963243] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.969177] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.975284] [] ? rw_verify_area+0x100/0x2f0 [ 30.981224] [] compat_readv+0xd9/0x140 [ 30.986725] [] compat_SyS_readv+0xd8/0x1b0 [ 30.992571] [] ? SyS_pwritev+0x230/0x230 [ 30.998246] [] ? do_fast_syscall_32+0xd7/0x890 [ 31.004440] [] ? SyS_pwritev+0x230/0x230 [ 31.010120] [] do_fast_syscall_32+0x314/0x890 [ 31.016229] [] sysenter_flags_fixed+0xd/0x17 [ 31.022253] 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 [ 31.048518] RIP [] __free_pages+0x21/0x90 [ 31.054396] RSP [ 31.058090] ---[ end trace 57d3afae8ff3cb2d ]--- [ 31.062829] Kernel panic - not syncing: Fatal exception [ 31.068858] Dumping ftrace buffer: [ 31.072375] (ftrace buffer empty) [ 31.076052] Kernel Offset: disabled [ 31.079654] Rebooting in 86400 seconds..