[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.759894] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.180726] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.437472] random: sshd: uninitialized urandom read (32 bytes read, 39 bits of entropy available) [ 23.261471] random: sshd: uninitialized urandom read (32 bytes read, 101 bits of entropy available) [ 23.421829] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.15.232' (ECDSA) to the list of known hosts. [ 28.787811] random: sshd: uninitialized urandom read (32 bytes read, 111 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 [ 28.894702] IPVS: Creating netns size=2552 id=1 [ 28.914679] sg_write: data in/out 36090/1 bytes for SCSI command 0x5e-- guessing data in; [ 28.914679] program syzkaller303191 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.646002] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.099330] kasan: CONFIG_KASAN_INLINE enabled [ 30.103768] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.116586] Dumping ftrace buffer: [ 30.120090] (ftrace buffer empty) [ 30.123766] Modules linked in: [ 30.127039] CPU: 0 PID: 3327 Comm: syzkaller303191 Not tainted 4.4.110-g618a510 #15 [ 30.134794] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.144116] task: ffff8801d1552f80 task.stack: ffff8800b43a0000 [ 30.150134] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.158358] RSP: 0018:ffff8800b43a7970 EFLAGS: 00010a07 [ 30.163770] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b [ 30.171003] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 30.178237] RBP: ffff8800b43a7980 R08: 0000000000000001 R09: 0000000000000000 [ 30.185472] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 30.192718] R13: 0000000000000020 R14: ffff8800b0388000 R15: dffffc0000000000 [ 30.199955] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:0000000008b3f840 [ 30.208151] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.213998] CR2: 0000000020bb7000 CR3: 00000000b497c000 CR4: 0000000000160670 [ 30.221235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.228471] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.235705] Stack: [ 30.237818] 0000000000000000 ffff8800b0388158 ffff8800b43a79e0 ffffffff825b9c81 [ 30.245770] ffff8800b0388170 ffffed001607102b ffffed001607102e ffff8800b0388168 [ 30.253719] dead4ead00000000 ffff8800b0388140 0000000000000000 0000000000000000 [ 30.261664] Call Trace: [ 30.264218] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.270676] [] sg_finish_rem_req+0x2b5/0x340 [ 30.276697] [] sg_new_read.isra.18+0x39/0x3c0 [ 30.282805] [] ? sg_get_rq_mark+0x142/0x190 [ 30.288749] [] sg_read+0x8c2/0x1490 [ 30.293993] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.300626] [] ? fsnotify+0xee0/0xee0 [ 30.306061] [] ? avc_policy_seqno+0x9/0x20 [ 30.311913] [] do_loop_readv_writev+0x141/0x1e0 [ 30.318195] [] ? security_file_permission+0x89/0x1e0 [ 30.324922] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.331552] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.338181] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.344639] [] ? vfs_writev+0xb0/0xb0 [ 30.350052] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.355987] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.362097] [] ? rw_verify_area+0x100/0x2f0 [ 30.368033] [] compat_readv+0xd9/0x140 [ 30.373629] [] compat_SyS_readv+0xd8/0x1b0 [ 30.379487] [] ? SyS_pwritev+0x230/0x230 [ 30.385163] [] ? do_fast_syscall_32+0xd7/0x890 [ 30.391360] [] ? SyS_pwritev+0x230/0x230 [ 30.397035] [] do_fast_syscall_32+0x314/0x890 [ 30.403144] [] sysenter_flags_fixed+0xd/0x17 [ 30.409170] 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 [ 30.435614] RIP [] __free_pages+0x21/0x90 [ 30.441490] RSP [ 30.445453] ---[ end trace dcade31d2a79fe03 ]--- [ 30.450209] Kernel panic - not syncing: Fatal exception [ 30.455948] Dumping ftrace buffer: [ 30.459456] (ftrace buffer empty) [ 30.463141] Kernel Offset: disabled [ 30.466732] Rebooting in 86400 seconds..