[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting O[ 15.541446] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) penBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.859979] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.139644] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 22.898319] random: sshd: uninitialized urandom read (32 bytes read, 84 bits of entropy available) [ 46.843358] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available) Warning: Permanently added '10.128.0.20' (ECDSA) to the list of known hosts. [ 52.218187] random: sshd: uninitialized urandom read (32 bytes read, 101 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 55.537999] kasan: CONFIG_KASAN_INLINE enabled [ 55.542549] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 55.555464] Dumping ftrace buffer: [ 55.558988] (ftrace buffer empty) [ 55.562678] Modules linked in: [ 55.565952] CPU: 1 PID: 3894 Comm: syzkaller962609 Not tainted 4.4.111-gf851888 #16 [ 55.573726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.583060] task: ffff8801ce8eaf80 task.stack: ffff8801ce8f0000 [ 55.589084] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 55.597324] RSP: 0018:ffff8801ce8f7970 EFLAGS: 00010a07 [ 55.602746] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9e9b [ 55.610003] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 55.617246] RBP: ffff8801ce8f7980 R08: 0000000000000001 R09: 0000000000000001 [ 55.624490] R10: 0000000000000000 R11: 1ffff10039d1ef0c R12: 0000000000000004 [ 55.631733] R13: 0000000000000020 R14: ffff8800b2d3a100 R15: dffffc0000000000 [ 55.638975] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000092ca900 [ 55.647176] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 55.653037] CR2: 0000000020dc8000 CR3: 00000001ce8f8000 CR4: 0000000000160670 [ 55.660285] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 55.667529] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 55.674775] Stack: [ 55.676894] ffffffff83776469 ffff8800b2d3a258 ffff8801ce8f79e0 ffffffff825b9ec1 [ 55.684874] ffff8800b2d3a270 ffffed00165a744b ffffed00165a744e ffff8800b2d3a268 [ 55.692839] dead4ead00000000 ffff8800b2d3a240 0000000000000000 0000000000000000 [ 55.700794] Call Trace: [ 55.703349] [] ? retint_kernel+0x2d/0x2d [ 55.709031] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 55.715500] [] sg_finish_rem_req+0x2b5/0x340 [ 55.721528] [] sg_new_read.isra.18+0x336/0x3c0 [ 55.727741] [] sg_read+0x8c2/0x1490 [ 55.733009] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.739656] [] ? fsnotify+0xee0/0xee0 [ 55.745079] [] ? avc_policy_seqno+0x9/0x20 [ 55.750949] [] do_loop_readv_writev+0x141/0x1e0 [ 55.757237] [] ? security_file_permission+0x89/0x1e0 [ 55.763969] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.770625] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 55.770638] [] compat_do_readv_writev+0x5df/0x6e0 [ 55.770643] [] ? vfs_writev+0xb0/0xb0 [ 55.770650] [] ? _raw_spin_unlock+0x2c/0x50 [ 55.770659] [] ? handle_mm_fault+0x3f2/0x3190 [ 55.770665] [] ? rw_verify_area+0x100/0x2f0 [ 55.770672] [] compat_readv+0xd9/0x140 [ 55.770678] [] compat_SyS_readv+0xd8/0x1b0 [ 55.770683] [] ? SyS_pwritev+0x230/0x230 [ 55.770691] [] ? do_fast_syscall_32+0xd7/0x890 [ 55.770696] [] ? SyS_pwritev+0x230/0x230 [ 55.770701] [] do_fast_syscall_32+0x314/0x890 [ 55.770709] [] sysenter_flags_fixed+0xd/0x17 [ 55.770794] 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 [ 55.770802] RIP [] __free_pages+0x21/0x90 [ 55.770804] RSP [ 55.788731] ---[ end trace ea5b9876b7249ccc ]--- [ 55.788736] Kernel panic - not syncing: Fatal exception [ 55.789961] Dumping ftrace buffer: [ 55.789963] (ftrace buffer empty) [ 55.789966] Kernel Offset: disabled [ 55.898141] Rebooting in 86400 seconds..