[ 16.354514] random: sshd: uninitialized urandom read (32 bytes read, 33 bits of entropy available) [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.354627] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 20.695474] random: sshd: uninitialized urandom read (32 bytes read, 37 bits of entropy available) [ 21.559731] random: sshd: uninitialized urandom read (32 bytes read, 105 bits of entropy available) [ 21.729469] random: sshd: uninitialized urandom read (32 bytes read, 109 bits of entropy available) Warning: Permanently added '10.128.0.41' (ECDSA) to the list of known hosts. [ 27.126930] random: sshd: uninitialized urandom read (32 bytes read, 117 bits of entropy available) net.ipv6.conf.syz0.accept_dad = 0 net.ipv6.conf.syz0.router_solicitations = 0 net.ipv6.conf.syz7.accept_dad = 0 net.ipv6.conf.syz1.accept_dad = 0 net.ipv6.conf.syz3.accept_dad = 0 net.ipv6.conf.syz4.accept_dad = 0 net.ipv6.conf.syz2.accept_dad = 0 net.ipv6.conf.syz6.accept_dad = 0 net.ipv6.conf.syz5.accept_dad = 0 net.ipv6.conf.syz7.router_solicitations = 0 net.ipv6.conf.syz3.router_solicitations = 0 net.ipv6.conf.syz1.router_solicitations = 0 net.ipv6.conf.syz6.router_solicitations = 0 net.ipv6.conf.syz4.router_solicitations = 0 net.ipv6.conf.syz2.router_solicitations = 0 net.ipv6.conf.syz5.router_solicitations = 0 [ 28.088991] IPVS: Creating netns size=2552 id=1 executing program [ 28.303982] IPVS: Creating netns size=2552 id=2 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.405823] IPVS: Creating netns size=2552 id=3 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.458843] IPVS: Creating netns size=2552 id=4 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.530741] IPVS: Creating netns size=2552 id=5 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.590832] kasan: CONFIG_KASAN_INLINE enabled[ 28.595303] BUG: spinlock bad magic on CPU#0, syzkaller592207/3544 [ 28.595313] lock: 0xffff8800afca4218, .magic: dead4eac, .owner: /-1, .owner_cpu: -1 [ 28.595320] CPU: 0 PID: 3544 Comm: syzkaller592207 Not tainted 4.4.107-g610c835 #4 [ 28.595323] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.595325] 0000000000000000 30b58d214e5f7ec5 ffff8801db2078d8 ffffffff81d0457d [ 28.595332] ffff8800afca4218 ffff8801ce5d0000 0000000000000001 0000000000000001 [ 28.595337] 0000000000000000 ffff8801db207918 ffffffff812438fd ffff8801d770e880 [ 28.595342] Call Trace: [ 28.595344] [] dump_stack+0xc1/0x124 [ 28.595368] [] spin_dump+0x14d/0x280 [ 28.595377] [] ? __blk_mq_free_request+0xe8/0x130 [ 28.595382] [] do_raw_spin_lock+0x228/0x2c0 [ 28.595390] [] _raw_spin_lock_irqsave+0x56/0x70 [ 28.595396] [] ? __wake_up+0x1e/0x50 [ 28.595401] [] __wake_up+0x1e/0x50 [ 28.595410] [] sg_rq_end_io+0x5dc/0xbc0 [ 28.595415] [] ? sg_release+0x1f0/0x1f0 [ 28.595423] [] ? blk_account_io_done+0xb1/0x860 [ 28.595429] [] ? blk_update_request+0x64e/0xce0 [ 28.595435] [] ? sg_release+0x1f0/0x1f0 [ 28.595441] [] __blk_mq_end_request+0x54/0xc0 [ 28.595448] [] scsi_end_request+0x135/0x5b0 [ 28.595454] [] scsi_io_completion+0x15c3/0x1710 [ 28.595460] [] ? scsi_unblock_requests+0x50/0x50 [ 28.595465] [] ? scsi_handle_queue_ramp_up+0x332/0x440 [ 28.595469] [] scsi_finish_command+0x3af/0x520 [ 28.595475] [] scsi_softirq_done+0x250/0x350 [ 28.595481] [] __blk_mq_complete_request+0x205/0x500 [ 28.595487] [] blk_mq_complete_request+0x5b/0x70 [ 28.595492] [] scsi_mq_done+0xfb/0x3c0 [ 28.595499] [] virtscsi_complete_cmd+0x5cf/0x7f0 [ 28.595505] [] ? virtscsi_remove+0x140/0x140 [ 28.595511] [] virtscsi_vq_done+0xc9/0x170 [ 28.595517] [] ? virtscsi_target_destroy+0x50/0x50 [ 28.595523] [] virtscsi_req_done+0xa7/0xd0 [ 28.595529] [] ? virtscsi_vq_done+0x170/0x170 [ 28.595536] [] vring_interrupt+0x109/0x150 [ 28.595541] [] ? vring_new_virtqueue+0x7c0/0x7c0 [ 28.595548] [] handle_irq_event_percpu+0xf1/0x960 [ 28.595554] [] handle_irq_event+0xa7/0x140 [ 28.595560] [] handle_edge_irq+0x1fa/0x8e0 [ 28.595567] [] handle_irq+0x250/0x3a0 [ 28.595574] [] ? check_preemption_disabled+0x3b/0x200 [ 28.595579] [] ? trace_hardirqs_off+0xd/0x10 [ 28.595585] [] do_IRQ+0x89/0x1b0 [ 28.595591] [] common_interrupt+0x8c/0x8c [ 28.595592] [] ? console_unlock+0x790/0xa00 [ 28.595604] [] ? console_unlock+0x79a/0xa00 [ 28.595609] [] ? _raw_spin_unlock_irqrestore+0x45/0x70 [ 28.595614] [] ? vprintk_emit+0x323/0x850 [ 28.595620] [] vprintk_emit+0x55e/0x850 [ 28.595626] [] vprintk+0x28/0x30 [ 28.595630] [] vprintk_default+0x1d/0x30 [ 28.595639] [] printk+0xb7/0xe2 [ 28.595645] [] ? pm_qos_get_value.part.4+0xb/0xb [ 28.595651] [] ? kasan_die_handler+0x25/0x40 [ 28.595655] [] kasan_die_handler+0x31/0x40 [ 28.595661] [] notifier_call_chain+0x95/0x1b0 [ 28.595667] [] atomic_notifier_call_chain+0x7b/0x140 [ 28.595672] [] ? __atomic_notifier_call_chain+0x150/0x150 [ 28.595676] [] notify_die+0xdf/0x160 [ 28.595681] [] ? atomic_notifier_call_chain+0x140/0x140 [ 28.595687] [] ? __free_pages+0x21/0x90 [ 28.595693] [] ? search_exception_tables+0x31/0x40 [ 28.595698] [] do_general_protection+0x2f7/0x390 [ 28.595704] [] general_protection+0x28/0x30 [ 28.595710] [] ? sg_remove_scat.isra.17+0x19b/0x2d0 [ 28.595716] [] ? __free_pages+0x21/0x90 [ 28.595722] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 28.595728] [] sg_finish_rem_req+0x2b5/0x340 [ 28.595735] [] sg_new_read.isra.18+0x39/0x3c0 [ 28.595740] [] ? sg_get_rq_mark+0x142/0x190 [ 28.595746] [] sg_read+0x8c2/0x1490 [ 28.595753] [] ? __kmalloc+0x124/0x320 [ 28.595759] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.595765] [] ? fsnotify+0xee0/0xee0 [ 28.595774] [] ? avc_policy_seqno+0x9/0x20 [ 28.595783] [] do_loop_readv_writev+0x141/0x1e0 [ 28.595790] [] ? security_file_permission+0x89/0x1e0 [ 28.595797] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.595803] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.595810] [] compat_do_readv_writev+0x5df/0x6e0 [ 28.595816] [] ? vfs_writev+0xb0/0xb0 [ 28.595824] [] ? __fget+0x20b/0x3b0 [ 28.595829] [] ? __fget+0x232/0x3b0 [ 28.595834] [] ? __fget+0x47/0x3b0 [ 28.595840] [] compat_readv+0xd9/0x140 [ 28.595845] [] compat_SyS_readv+0xd8/0x1b0 [ 28.595850] [] ? SyS_pwritev+0x230/0x230 [ 28.595856] [] ? vmacache_update+0xfe/0x130 [ 28.595861] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.595866] [] ? SyS_pwritev+0x230/0x230 [ 28.595872] [] do_fast_syscall_32+0x314/0x890 [ 28.595878] [] sysenter_flags_fixed+0xd/0x17 [ 28.632912] kasan: CONFIG_KASAN_INLINE enabledkasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.632930] Dumping ftrace buffer: [ 28.632933] (ftrace buffer empty) [ 28.632935] Modules linked in: [ 28.632943] CPU: 1 PID: 3549 Comm: syzkaller592207 Not tainted 4.4.107-g610c835 #4 [ 28.632946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.632950] task: ffff8800b22fdf00 task.stack: ffff8801cc058000 [ 28.632953] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 28.632968] RSP: 0018:ffff8801cc05f9c0 EFLAGS: 00010a07 [ 28.632972] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 28.632976] RDX: 1bd5a9d5a0000003 RSI: 0000000000000001 RDI: dead4ead0000001c [ 28.632979] RBP: ffff8801cc05f9d0 R08: 0000000000000000 R09: 0000000000000001 [ 28.632983] R10: 0000000000000000 R11: 1ffff1003980bf16 R12: 0000000000000004 [ 28.632986] R13: 0000000000000020 R14: ffff8800afcba100 R15: dffffc0000000000 [ 28.632991] FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f771ab40 [ 28.632999] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.633002] CR2: 0000000020be9000 CR3: 00000001d1955000 CR4: 00000000001406e0 [ 28.633008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.633011] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.633012] Stack: [ 28.633014] ffffffff837748b9 ffff8800afcba258 ffff8801cc05fa30 ffffffff825b8cf1 [ 28.633023] ffff8800afcba270 ffffed0015f9744b ffffed0015f9744e ffff8800afcba268 [ 28.633030] dead4ead00000000 ffff8800afcba240 0000000000000000 0000000000000000 [ 28.633038] Call Trace: [ 28.633046] [] ? retint_kernel+0x2d/0x2d [ 28.633056] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 28.633062] [] sg_finish_rem_req+0x2b5/0x340 [ 28.633068] [] sg_read+0xa21/0x1490 [ 28.633076] [] ? __kmalloc+0x124/0x320 [ 28.633083] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.633089] [] ? fsnotify+0xee0/0xee0 [ 28.633096] [] ? iov_iter_advance+0x164/0x4f0 [ 28.633104] [] do_loop_readv_writev+0x141/0x1e0 [ 28.633113] [] ? security_file_permission+0x89/0x1e0 [ 28.633120] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.633126] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.633133] [] compat_do_readv_writev+0x5df/0x6e0 [ 28.633139] [] ? vfs_writev+0xb0/0xb0 [ 28.633146] [] ? __fget+0x20b/0x3b0 [ 28.633152] [] ? __fget+0x232/0x3b0 [ 28.633157] [] ? __fget+0x47/0x3b0 [ 28.633164] [] compat_readv+0xd9/0x140 [ 28.633169] [] compat_SyS_readv+0xd8/0x1b0 [ 28.633174] [] ? SyS_pwritev+0x230/0x230 [ 28.633181] [] ? vmacache_update+0xfe/0x130 [ 28.633187] [] ? do_fast_syscall_32+0xd7/0x890 [ 28.633192] [] ? SyS_pwritev+0x230/0x230 [ 28.633198] [] do_fast_syscall_32+0x314/0x890 [ 28.633204] [] sysenter_flags_fixed+0xd/0x17 [ 28.633206] 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 [ 28.633308] RIP [] __free_pages+0x21/0x90 [ 28.633315] RSP [ 28.640198] ---[ end trace f94df6755ae541a8 ]--- [ 28.640203] Kernel panic - not syncing: Fatal exception [ 28.640765] Dumping ftrace buffer: [ 28.640769] (ftrace buffer empty) [ 28.640771] Kernel Offset: disabled [ 29.538268] Rebooting in 86400 seconds..