[ 15.703318] 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: [ 21.730790] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.994381] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 22.845545] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) [ 23.020102] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) Warning: Permanently added '10.128.0.22' (ECDSA) to the list of known hosts. [ 28.416733] random: sshd: uninitialized urandom read (32 bytes read, 119 bits of entropy available) executing program [ 28.518336] 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 [ 28.539667] sg_write: data in/out 36090/8 bytes for SCSI command 0x67-- guessing data in; [ 28.539667] program syzkaller271882 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 [ 29.334057] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 30.744575] kasan: CONFIG_KASAN_INLINE enabled [ 30.749213] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 30.762816] Dumping ftrace buffer: [ 30.766319] (ftrace buffer empty) [ 30.769996] Modules linked in: [ 30.773269] CPU: 0 PID: 3878 Comm: syzkaller271882 Not tainted 4.4.110-gdac1439 #13 [ 30.781026] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.790598] task: ffff8800b0c22f80 task.stack: ffff8801d5358000 [ 30.796619] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 30.804852] RSP: 0018:ffff8801d535f970 EFLAGS: 00010a07 [ 30.810267] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9c5b [ 30.817513] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 30.824756] RBP: ffff8801d535f980 R08: 0000000000000001 R09: 0000000000000000 [ 30.831993] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 30.839255] R13: 0000000000000020 R14: ffff8801d536c200 R15: dffffc0000000000 [ 30.846492] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000090ca900 [ 30.854691] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 30.860546] CR2: 00000000205c0000 CR3: 00000001cf986000 CR4: 0000000000160670 [ 30.867782] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.875017] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.882256] Stack: [ 30.884376] 0000000000000000 ffff8801d536c358 ffff8801d535f9e0 ffffffff825b9c81 [ 30.892322] ffff8801d536c370 ffffed003aa6d86b ffffed003aa6d86e ffff8801d536c368 [ 30.900264] dead4ead00000000 ffff8801d536c340 0000000000000000 0000000000000000 [ 30.908211] Call Trace: [ 30.910771] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 30.917228] [] sg_finish_rem_req+0x2b5/0x340 [ 30.923251] [] sg_new_read.isra.18+0x39/0x3c0 [ 30.929359] [] ? sg_get_rq_mark+0x142/0x190 [ 30.935295] [] sg_read+0x8c2/0x1490 [ 30.940544] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.947173] [] ? fsnotify+0xee0/0xee0 [ 30.952590] [] ? avc_policy_seqno+0x9/0x20 [ 30.958441] [] do_loop_readv_writev+0x141/0x1e0 [ 30.964725] [] ? security_file_permission+0x89/0x1e0 [ 30.971444] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.978076] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 30.984706] [] compat_do_readv_writev+0x5df/0x6e0 [ 30.991163] [] ? vfs_writev+0xb0/0xb0 [ 30.996579] [] ? _raw_spin_unlock_irq+0x27/0x50 [ 31.002863] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 31.009669] [] ? _raw_spin_unlock_irq+0x38/0x50 [ 31.015971] [] ? finish_task_switch+0x1e7/0x4e0 [ 31.022265] [] ? finish_task_switch+0x1bb/0x4e0 [ 31.028554] [] ? __schedule+0xa26/0x1c70 [ 31.034240] [] ? __schedule+0xa9d/0x1c70 [ 31.039917] [] ? retint_kernel+0x2d/0x2d [ 31.045594] [] compat_readv+0xd9/0x140 [ 31.051094] [] compat_SyS_readv+0xd8/0x1b0 [ 31.056941] [] ? SyS_pwritev+0x230/0x230 [ 31.062616] [] ? SyS_pwritev+0x230/0x230 [ 31.068289] [] ? do_fast_syscall_32+0x215/0x890 [ 31.074572] [] ? SyS_pwritev+0x230/0x230 [ 31.080246] [] do_fast_syscall_32+0x314/0x890 [ 31.086356] [] sysenter_flags_fixed+0xd/0x17 [ 31.092375] 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 [ 31.118687] RIP [] __free_pages+0x21/0x90 [ 31.124564] RSP [ 31.131469] ---[ end trace 7bd4b56165d1b949 ]--- [ 31.136207] Kernel panic - not syncing: Fatal exception [ 31.141567] Dumping ftrace buffer: [ 31.145075] (ftrace buffer empty) [ 31.148751] Kernel Offset: disabled [ 31.152348] Rebooting in 86400 seconds..