[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.479952] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.958037] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.157307] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.929682] random: sshd: uninitialized urandom read (32 bytes read, 95 bits of entropy available) [ 38.024824] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.15.210' (ECDSA) to the list of known hosts. [ 43.408789] random: sshd: uninitialized urandom read (32 bytes read, 113 bits of entropy available) executing program executing program [ 43.532559] kasan: CONFIG_KASAN_INLINE enabled [ 43.537034] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 43.550150] Dumping ftrace buffer: [ 43.553661] (ftrace buffer empty) [ 43.557337] Modules linked in: [ 43.560603] CPU: 1 PID: 3326 Comm: syzkaller183673 Not tainted 4.4.107-g610c835 #4 [ 43.568297] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.577616] task: ffff8800b4b05f00 task.stack: ffff8801d0aa0000 [ 43.583635] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 43.591856] RSP: 0018:ffff8801d0aa7970 EFLAGS: 00010a07 [ 43.597269] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 43.604504] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 43.611737] RBP: ffff8801d0aa7980 R08: 0000000000000001 R09: 0000000000000000 [ 43.618970] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000004 [ 43.626203] R13: 0000000000000020 R14: ffff8801d018a100 R15: dffffc0000000000 [ 43.633441] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7792b40 [ 43.641630] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 43.647477] CR2: 0000000000000ffe CR3: 00000001d138f000 CR4: 00000000001406e0 [ 43.654727] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.661961] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.669200] Stack: [ 43.671312] 0000000000000000 ffff8801d018a258 ffff8801d0aa79e0 ffffffff825b8cf1 [ 43.679254] ffff8801d018a270 ffffed003a03144b ffffed003a03144e ffff8801d018a268 [ 43.687192] dead4ead00000000 ffff8801d018a240 0000000000000000 0000000000000000 [ 43.695134] Call Trace: [ 43.697691] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 43.704147] [] sg_finish_rem_req+0x2b5/0x340 [ 43.710168] [] sg_new_read.isra.18+0x39/0x3c0 [ 43.716273] [] ? sg_get_rq_mark+0x142/0x190 [ 43.722204] [] sg_read+0x8c2/0x1490 [ 43.727445] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.734076] [] ? fsnotify+0xee0/0xee0 [ 43.739491] [] ? avc_policy_seqno+0x9/0x20 [ 43.745343] [] do_loop_readv_writev+0x141/0x1e0 [ 43.751625] [] ? security_file_permission+0x89/0x1e0 [ 43.758343] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.764976] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.771724] [] compat_do_readv_writev+0x5df/0x6e0 [ 43.778181] [] ? vfs_writev+0xb0/0xb0 [ 43.783597] [] ? exit_robust_list+0x240/0x240 [ 43.789709] [] ? __fget+0x20b/0x3b0 [ 43.794949] [] ? __fget+0x232/0x3b0 [ 43.800188] [] ? __fget+0x47/0x3b0 [ 43.805344] [] compat_readv+0xd9/0x140 [ 43.810846] [] compat_SyS_readv+0xd8/0x1b0 [ 43.816693] [] ? SyS_pwritev+0x230/0x230 [ 43.822366] [] ? do_fast_syscall_32+0xd7/0x890 [ 43.828564] [] ? SyS_pwritev+0x230/0x230 [ 43.834235] [] do_fast_syscall_32+0x314/0x890 [ 43.840345] [] sysenter_flags_fixed+0xd/0x17 [ 43.846369] Code: 76 ae 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 [ 43.872660] RIP [] __free_pages+0x21/0x90 [ 43.878537] RSP [ 43.884565] ---[ end trace d9080b70941662d5 ]--- [ 43.889328] Kernel panic - not syncing: Fatal exception [ 43.893502] kasan: CONFIG_KASAN_INLINE enabled [ 43.893507] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 43.893510] general protection fault: 0000 [#2] PREEMPT SMP KASAN [ 43.893513] Dumping ftrace buffer: [ 43.893515] (ftrace buffer empty) [ 43.893517] Modules linked in: [ 43.893522] CPU: 1 PID: 3328 Comm: syzkaller183673 Tainted: G D 4.4.107-g610c835 #4 [ 43.893524] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.893527] task: ffff8801d09617c0 task.stack: ffff8801d0108000 [ 43.893537] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 43.893539] RSP: 0018:ffff8801d010f970 EFLAGS: 00010a07 [ 43.893542] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 43.893544] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 43.893546] RBP: ffff8801d010f980 R08: 0000000000000000 R09: 0000000000000000 [ 43.893548] R10: 0000000000000000 R11: 1ffff1003a021f0e R12: 0000000000000004 [ 43.893551] R13: 0000000000000020 R14: ffff8800b3d70000 R15: dffffc0000000000 [ 43.893554] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f7771b40 [ 43.893556] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 43.893558] CR2: 00000000f774fdf8 CR3: 00000001d138f000 CR4: 00000000001406e0 [ 43.893562] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 43.893564] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 43.893565] Stack: [ 43.893569] 0000000000000000 ffff8800b3d70158 ffff8801d010f9e0 ffffffff825b8cf1 [ 43.893574] ffff8800b3d70170 ffffed00167ae02b ffffed00167ae02e ffff8800b3d70168 [ 43.893578] dead4ead00000000 ffff8800b3d70140 0000000000000000 0000000000000000 [ 43.893578] Call Trace: [ 43.893586] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 43.893590] [] sg_finish_rem_req+0x2b5/0x340 [ 43.893594] [] sg_new_read.isra.18+0x39/0x3c0 [ 43.893597] [] ? sg_get_rq_mark+0x142/0x190 [ 43.893601] [] sg_read+0x8c2/0x1490 [ 43.893605] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.893609] [] ? fsnotify+0xee0/0xee0 [ 43.893615] [] ? avc_policy_seqno+0x9/0x20 [ 43.893628] [] do_loop_readv_writev+0x141/0x1e0 [ 43.893632] [] ? security_file_permission+0x89/0x1e0 [ 43.893636] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.893640] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 43.893644] [] compat_do_readv_writev+0x5df/0x6e0 [ 43.893648] [] ? vfs_writev+0xb0/0xb0 [ 43.893653] [] ? exit_robust_list+0x240/0x240 [ 43.893658] [] ? debug_check_no_obj_freed+0x2d2/0x9b0 [ 43.893662] [] ? __fget+0x20b/0x3b0 [ 43.893666] [] ? __fget+0x232/0x3b0 [ 43.893668] [] ? __fget+0x47/0x3b0 [ 43.893673] [] compat_readv+0xd9/0x140 [ 43.893676] [] compat_SyS_readv+0xd8/0x1b0 [ 43.893679] [] ? SyS_pwritev+0x230/0x230 [ 43.893682] [] ? SyS_pwritev+0x230/0x230 [ 43.893687] [] do_fast_syscall_32+0x314/0x890 [ 43.893693] [] sysenter_flags_fixed+0xd/0x17 [ 43.893742] Code: 76 ae 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 [ 43.893746] RIP [] __free_pages+0x21/0x90 [ 43.893747] RSP [ 43.893751] ---[ end trace d9080b70941662d6 ]--- [ 45.303260] Shutting down cpus with NMI [ 45.307591] Dumping ftrace buffer: [ 45.311095] (ftrace buffer empty) [ 45.314771] Kernel Offset: disabled [ 45.318360] Rebooting in 86400 seconds..