[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.884012] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.510918] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.803890] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.611941] random: sshd: uninitialized urandom read (32 bytes read, 98 bits of entropy available) [ 21.806841] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) Warning: Permanently added '10.128.0.14' (ECDSA) to the list of known hosts. [ 27.211256] random: sshd: uninitialized urandom read (32 bytes read, 110 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 [ 27.385158] kasan: CONFIG_KASAN_INLINE enabled [ 27.385384] BUG: spinlock bad magic on CPU#0, syzkaller154332/3329 [ 27.385392] lock: 0xffff8800b51f8018, .magic: dead4eac, .owner: /-1, .owner_cpu: -1 [ 27.385400] CPU: 0 PID: 3329 Comm: syzkaller154332 Not tainted 4.4.111-g3301b55 #24 [ 27.385403] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.385405] 0000000000000000 1c34afb5065735e7 ffff8801db2078d8 ffffffff81d0509d [ 27.385413] ffff8800b51f8018 ffff8800b47c8000 0000000000000001 0000000000000001 [ 27.385421] 0000000000000000 ffff8801db207918 ffffffff81245acd 0000000000000000 [ 27.385428] Call Trace: [ 27.385430] [] dump_stack+0xc1/0x124 [ 27.385449] [] spin_dump+0x14d/0x280 [ 27.385455] [] do_raw_spin_lock+0x228/0x2c0 [ 27.385463] [] _raw_spin_lock_irqsave+0x56/0x70 [ 27.385470] [] ? __wake_up+0x1e/0x50 [ 27.385476] [] __wake_up+0x1e/0x50 [ 27.385485] [] sg_rq_end_io+0x5dc/0xbc0 [ 27.385491] [] ? sg_release+0x1f0/0x1f0 [ 27.385499] [] ? blk_account_io_done+0xb1/0x860 [ 27.385506] [] ? blk_update_request+0x64e/0xce0 [ 27.385511] [] ? sg_release+0x1f0/0x1f0 [ 27.385519] [] __blk_mq_end_request+0x54/0xc0 [ 27.385526] [] scsi_end_request+0x135/0x5b0 [ 27.385533] [] scsi_io_completion+0x15c3/0x1710 [ 27.385539] [] ? scsi_unblock_requests+0x50/0x50 [ 27.385546] [] ? debug_check_no_locks_freed+0x2c0/0x2c0 [ 27.385552] [] scsi_finish_command+0x3af/0x520 [ 27.385558] [] scsi_softirq_done+0x250/0x350 [ 27.385564] [] __blk_mq_complete_request+0x205/0x500 [ 27.385571] [] blk_mq_complete_request+0x5b/0x70 [ 27.385576] [] scsi_mq_done+0xfb/0x3c0 [ 27.385583] [] virtscsi_complete_cmd+0x5cf/0x7f0 [ 27.385589] [] ? virtscsi_remove+0x140/0x140 [ 27.385595] [] virtscsi_vq_done+0xc9/0x170 [ 27.385602] [] ? virtscsi_target_destroy+0x50/0x50 [ 27.385608] [] virtscsi_req_done+0xa7/0xd0 [ 27.385614] [] ? virtscsi_vq_done+0x170/0x170 [ 27.385620] [] vring_interrupt+0x109/0x150 [ 27.385626] [] ? vring_new_virtqueue+0x7c0/0x7c0 [ 27.385633] [] handle_irq_event_percpu+0xf1/0x960 [ 27.385639] [] handle_irq_event+0xa7/0x140 [ 27.385646] [] handle_edge_irq+0x1fa/0x8e0 [ 27.385653] [] handle_irq+0x250/0x3a0 [ 27.385659] [] ? check_preemption_disabled+0x3b/0x200 [ 27.385666] [] do_IRQ+0x89/0x1b0 [ 27.385671] [] common_interrupt+0xa0/0xa0 [ 27.385673] [] ? clear_page_c_e+0x7/0x10 [ 27.385687] [] ? clear_huge_page+0xf3/0x4b0 [ 27.385693] [] ? __raw_spin_lock_init+0x2d/0x100 [ 27.385700] [] do_huge_pmd_anonymous_page+0x270/0xa10 [ 27.385707] [] handle_mm_fault+0x271a/0x3190 [ 27.385712] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 27.385718] [] ? __fsnotify_parent+0xbc/0x340 [ 27.385727] [] ? avc_policy_seqno+0x9/0x20 [ 27.385731] [] ? fsnotify+0x5ad/0xee0 [ 27.385738] [] ? copy_page_range+0x14a0/0x14a0 [ 27.385744] [] ? vmacache_find+0x59/0x290 [ 27.385751] [] __do_page_fault+0x35b/0xa00 [ 27.385758] [] do_page_fault+0x27/0x30 [ 27.385763] [] page_fault+0x28/0x30 [ 27.389132] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 27.389150] Dumping ftrace buffer: [ 27.389153] (ftrace buffer empty) [ 27.389155] Modules linked in: [ 27.389164] CPU: 0 PID: 3326 Comm: syzkaller154332 Not tainted 4.4.111-g3301b55 #24 [ 27.389167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.389171] task: ffff8800b556c740 task.stack: ffff8800b4160000 [ 27.389174] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 27.389187] RSP: 0018:ffff8800b41679f0 EFLAGS: 00010a07 [ 27.389191] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b9ebb [ 27.389194] RDX: 1bd5a9d5a0000003 RSI: 0000000000000002 RDI: dead4ead0000001c [ 27.389198] RBP: ffff8800b4167a00 R08: 0000000000000000 R09: 0000000000000000 [ 27.389201] R10: 0000000000000000 R11: 1ffff1001682cf1e R12: 0000000000000004 [ 27.389204] R13: 0000000000000020 R14: ffff8800b51fa100 R15: dffffc0000000000 [ 27.389209] FS: 0000000001703940(0063) GS:ffff8801db200000(0000) knlGS:0000000000000000 [ 27.389213] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.389216] CR2: 0000000020bb7000 CR3: 00000000b4470000 CR4: 0000000000160670 [ 27.389222] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.389225] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.389226] Stack: [ 27.389228] 0000000000000000 ffff8800b51fa258 ffff8800b4167a60 ffffffff825b9ee1 [ 27.389236] ffff8800b51fa270 ffffed0016a3f44b ffffed0016a3f44e ffff8800b51fa268 [ 27.389244] dead4ead00000000 ffff8800b51fa240 0000000000000000 0000000000000000 [ 27.389251] Call Trace: [ 27.389260] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 27.389267] [] sg_finish_rem_req+0x2b5/0x340 [ 27.389274] [] sg_new_read.isra.18+0x39/0x3c0 [ 27.389280] [] ? sg_get_rq_mark+0x142/0x190 [ 27.389286] [] sg_read+0x8c2/0x1490 [ 27.389294] [] ? __check_object_size+0x154/0x35b [ 27.389300] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.389306] [] ? fsnotify+0xee0/0xee0 [ 27.389315] [] ? avc_policy_seqno+0x9/0x20 [ 27.389322] [] do_loop_readv_writev+0x141/0x1e0 [ 27.389329] [] ? security_file_permission+0x89/0x1e0 [ 27.389335] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.389342] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 27.389348] [] do_readv_writev+0x5dd/0x6e0 [ 27.389354] [] ? vfs_write+0x530/0x530 [ 27.389362] [] ? _raw_spin_unlock+0x2c/0x50 [ 27.389368] [] ? do_huge_pmd_anonymous_page+0x3dd/0xa10 [ 27.389375] [] ? handle_mm_fault+0x3f2/0x3190 [ 27.389380] [] ? __fsnotify_parent+0xbc/0x340 [ 27.389387] [] ? avc_policy_seqno+0x9/0x20 [ 27.389392] [] ? fsnotify+0x5ad/0xee0 [ 27.389399] [] ? __do_page_fault+0x290/0xa00 [ 27.389405] [] vfs_readv+0x78/0xb0 [ 27.389410] [] SyS_readv+0xd9/0x240 [ 27.389416] [] ? rw_copy_check_uvector+0x2d0/0x2d0 [ 27.389423] [] ? trace_hardirqs_on_thunk+0x17/0x19 [ 27.389429] [] entry_SYSCALL_64_fastpath+0x16/0x92 [ 27.389431] 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 [ 27.389529] RIP [] __free_pages+0x21/0x90 [ 27.389536] RSP [ 27.389542] ---[ end trace 0aec9e24b4889190 ]--- [ 27.389545] Kernel panic - not syncing: Fatal exception [ 27.390032] Dumping ftrace buffer: [ 27.390034] (ftrace buffer empty) [ 27.390036] Kernel Offset: disabled [ 28.132482] Rebooting in 86400 seconds..