[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.414627] 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: [ 19.470539] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 19.677567] random: sshd: uninitialized urandom read (32 bytes read, 36 bits of entropy available) [ 20.450886] random: sshd: uninitialized urandom read (32 bytes read, 90 bits of entropy available) [ 20.640098] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) Warning: Permanently added '10.128.15.207' (ECDSA) to the list of known hosts. [ 26.029591] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) [ 26.141983] IPVS: Creating netns size=2552 id=1 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 27.332464] kasan: CONFIG_KASAN_INLINE enabled [ 27.336961] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.349751] Dumping ftrace buffer: [ 27.353254] (ftrace buffer empty) [ 27.356936] Modules linked in: [ 27.360211] CPU: 0 PID: 3311 Comm: syzkaller620058 Not tainted 4.4.111-g3301b55 #24 [ 27.367978] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.377303] task: ffff8800b4e3af80 task.stack: ffff8801cc828000 [ 27.383327] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 27.391549] RSP: 0018:ffff8801cc82f9f0 EFLAGS: 00010a07 [ 27.396960] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 27.404197] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 27.411432] RBP: ffff8801cc82fa00 R08: 0000000000000001 R09: 0000000000000000 [ 27.418672] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 27.425907] R13: 0000000000000020 R14: ffff8801cb9c8000 R15: dffffc0000000000 [ 27.433143] FS: 0000000001299940(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.441335] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.447188] CR2: 00000000204e9fd0 CR3: 00000001cc802000 CR4: 0000000000160670 [ 27.454433] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.461668] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.468924] Stack: [ 27.471044] 0000000000000000 ffff8801cb9c8158 ffff8801cc82fa60 ffffffff825b9ee1 [ 27.478993] ffff8801cb9c8170 ffffed003973902b ffffed003973902e ffff8801cb9c8168 [ 27.486944] dead4ead00000000 ffff8801cb9c8140 0000000000000000 0000000000000000 [ 27.494894] Call Trace: [ 27.497451] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 27.504858] [] sg_finish_rem_req+0x2b5/0x340 [ 27.510885] [] sg_new_read.isra.18+0x39/0x3c0 [ 27.516999] [] ? sg_get_rq_mark+0x142/0x190 [ 27.522937] [] sg_read+0x8c2/0x1490 [ 27.528183] [] ? __check_object_size+0x154/0x35b [ 27.534558] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.541195] [] ? fsnotify+0xee0/0xee0 [ 27.546619] [] ? avc_policy_seqno+0x9/0x20 [ 27.552473] [] do_loop_readv_writev+0x141/0x1e0 [ 27.558757] [] ? security_file_permission+0x89/0x1e0 [ 27.565475] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.572107] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.578746] [] do_readv_writev+0x5dd/0x6e0 [ 27.584600] [] ? vfs_write+0x530/0x530 [ 27.590111] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.596049] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 27.603028] [] ? handle_mm_fault+0x3f2/0x3190 [ 27.609139] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.615956] [] ? __fsnotify_parent+0xbc/0x340 [ 27.622082] [] ? avc_policy_seqno+0x9/0x20 [ 27.627937] [] ? fsnotify+0x5ad/0xee0 [ 27.633352] [] vfs_readv+0x78/0xb0 [ 27.638506] [] SyS_readv+0xd9/0x240 [ 27.643750] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 27.650295] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 27.656840] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 27.663389] 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 [ 27.689762] RIP [] __free_pages+0x21/0x90 [ 27.695644] RSP [ 27.699803] ---[ end trace d30e43ada226c9fc ]--- [ 27.704549] Kernel panic - not syncing: Fatal exception [ 27.710362] Dumping ftrace buffer: [ 27.713874] (ftrace buffer empty) [ 27.717560] Kernel Offset: disabled [ 27.721153] Rebooting in 86400 seconds..