[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.450771] 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: [ 21.475986] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 21.916876] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.740550] random: sshd: uninitialized urandom read (32 bytes read, 99 bits of entropy available) [ 22.941222] random: sshd: uninitialized urandom read (32 bytes read, 106 bits of entropy available) Warning: Permanently added '10.128.0.30' (ECDSA) to the list of known hosts. [ 28.323086] random: sshd: uninitialized urandom read (32 bytes read, 115 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 [ 29.645258] 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 [ 30.363916] kasan: CONFIG_KASAN_INLINE enabled [ 30.368384] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.381225] Dumping ftrace buffer: [ 30.384729] (ftrace buffer empty) [ 30.388433] Modules linked in: [ 30.391707] CPU: 1 PID: 3857 Comm: syzkaller286515 Not tainted 4.4.111-gf851888 #23 [ 30.399463] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.408781] task: ffff8801ce4a5f00 task.stack: ffff8801d31f8000 [ 30.414806] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.423057] RSP: 0018:ffff8801d31ff9f0 EFLAGS: 00010a07 [ 30.428472] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9e9b [ 30.435710] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 30.442947] RBP: ffff8801d31ffa00 R08: 0000000000000001 R09: 0000000000000000 [ 30.450183] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 30.457422] R13: 0000000000000020 R14: ffff8801cead8000 R15: dffffc0000000000 [ 30.464660] FS: 0000000001bfa940(0063) GS:ffff8801db300000(0000) knlGS:0000000000000000 [ 30.472852] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.478699] CR2: 000000002064f000 CR3: 00000001ce8cc000 CR4: 0000000000160670 [ 30.485945] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.493182] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.500417] Stack: [ 30.502539] 0000000000000000 ffff8801cead8158 ffff8801d31ffa60 ffffffff825b9ec1 [ 30.510523] ffff8801cead8170 ffffed0039d5b02b ffffed0039d5b02e ffff8801cead8168 [ 30.518473] dead4ead00000000 ffff8801cead8140 0000000000000000 0000000000000000 [ 30.526422] Call Trace: [ 30.528979] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.535441] [] sg_finish_rem_req+0x2b5/0x340 [ 30.541472] [] sg_new_read.isra.18+0x39/0x3c0 [ 30.547584] [] ? sg_get_rq_mark+0x142/0x190 [ 30.553520] [] sg_read+0x8c2/0x1490 [ 30.558769] [] ? __check_object_size+0x154/0x35b [ 30.565141] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.573421] [] ? fsnotify+0xee0/0xee0 [ 30.578846] [] ? avc_policy_seqno+0x9/0x20 [ 30.584697] [] do_loop_readv_writev+0x141/0x1e0 [ 30.590979] [] ? security_file_permission+0x89/0x1e0 [ 30.597697] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.604328] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.610972] [] do_readv_writev+0x5dd/0x6e0 [ 30.616822] [] ? vfs_write+0x530/0x530 [ 30.622329] [] ? _raw_spin_unlock+0x2c/0x50 [ 30.628267] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 30.635422] [] ? handle_mm_fault+0x3f2/0x3190 [ 30.641533] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 30.648353] [] ? __fsnotify_parent+0xbc/0x340 [ 30.654469] [] ? avc_policy_seqno+0x9/0x20 [ 30.660319] [] ? fsnotify+0x5ad/0xee0 [ 30.665735] [] vfs_readv+0x78/0xb0 [ 30.670894] [] SyS_readv+0xd9/0x240 [ 30.676143] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 30.682697] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 30.689242] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 30.695784] 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 [ 30.722154] RIP [] __free_pages+0x21/0x90 [ 30.728046] RSP [ 30.733080] ---[ end trace 69e9413af2731a55 ]--- [ 30.737854] Kernel panic - not syncing: Fatal exception [ 30.743909] Dumping ftrace buffer: [ 30.747416] (ftrace buffer empty) [ 30.751091] Kernel Offset: disabled [ 30.754681] Rebooting in 86400 seconds..