Warning: Permanently added '10.128.1.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 484.484363][ T25] audit: type=1400 audit(1631323615.333:8): avc: denied { execmem } for pid=6565 comm="syz-executor408" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 484.567231][ T6566] block nbd0: shutting down sockets [ 716.152159][ T26] INFO: task syz-executor408:6566 blocked for more than 143 seconds. [ 716.160365][ T26] Not tainted 5.14.0-syzkaller #0 [ 716.167060][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 716.175976][ T26] task:syz-executor408 state:D stack:27176 pid: 6566 ppid: 6565 flags:0x00004004 [ 716.185368][ T26] Call Trace: [ 716.188668][ T26] __schedule+0x940/0x26f0 [ 716.193707][ T26] ? io_schedule_timeout+0x140/0x140 [ 716.199070][ T26] schedule+0xd3/0x270 [ 716.203779][ T26] schedule_timeout+0x1db/0x2a0 [ 716.208651][ T26] ? usleep_range+0x170/0x170 [ 716.213706][ T26] ? wait_for_completion+0x16e/0x280 [ 716.219008][ T26] ? lock_downgrade+0x6e0/0x6e0 [ 716.224336][ T26] ? do_raw_spin_lock+0x120/0x2b0 [ 716.229378][ T26] ? rwlock_bug.part.0+0x90/0x90 [ 716.234839][ T26] ? _raw_spin_unlock_irq+0x1f/0x40 [ 716.240058][ T26] wait_for_completion+0x176/0x280 [ 716.245592][ T26] ? bit_wait_io_timeout+0x160/0x160 [ 716.250898][ T26] ? flush_workqueue_prep_pwqs+0x290/0x4f0 [ 716.257216][ T26] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 716.263646][ T26] ? check_flush_dependency+0x86/0x400 [ 716.269124][ T26] flush_workqueue+0x3ed/0x15b0 [ 716.274377][ T26] ? find_held_lock+0x2d/0x110 [ 716.279158][ T26] ? check_flush_dependency+0x400/0x400 [ 716.285139][ T26] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 716.291399][ T26] ? sock_shutdown+0xb2/0x200 [ 716.296700][ T26] nbd_ioctl+0x631/0xa80 [ 716.300965][ T26] ? nbd_release+0x160/0x160 [ 716.306089][ T26] ? finish_wait+0x270/0x270 [ 716.310823][ T26] ? selinux_inode_getsecctx+0x90/0x90 [ 716.316713][ T26] ? nbd_release+0x160/0x160 [ 716.321317][ T26] blkdev_ioctl+0x2a1/0x700 [ 716.326290][ T26] ? blkdev_common_ioctl+0x18f0/0x18f0 [ 716.331764][ T26] block_ioctl+0xf9/0x140 [ 716.336525][ T26] ? blkdev_fsync+0xd0/0xd0 [ 716.341039][ T26] __x64_sys_ioctl+0x193/0x200 [ 716.346446][ T26] do_syscall_64+0x35/0xb0 [ 716.350897][ T26] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.357191][ T26] RIP: 0033:0x444279 [ 716.361091][ T26] RSP: 002b:00007ffea6711e28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 716.369930][ T26] RAX: ffffffffffffffda RBX: 00000000004004a0 RCX: 0000000000444279 [ 716.378020][ T26] RDX: 00000000ffffffff RSI: 000000000000ab03 RDI: 0000000000000005 [ 716.386175][ T26] RBP: 0000000000000000 R08: 00007ffea6711fc8 R09: 00007ffea6711fc8 [ 716.394276][ T26] R10: 00007ffea6711fc8 R11: 0000000000000246 R12: 0000000000403590 [ 716.402359][ T26] R13: 431bde82d7b634db R14: 00000000004b2018 R15: 00000000004004a0 [ 716.410392][ T26] [ 716.410392][ T26] Showing all locks held in the system: [ 716.418416][ T26] 1 lock held by khungtaskd/26: [ 716.423397][ T26] #0: ffffffff8b97d360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 [ 716.434055][ T26] 5 locks held by kworker/u4:2/149: [ 716.439255][ T26] #0: ffff8880b9c31ad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 [ 716.449264][ T26] #1: ffff8880b9c1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x16a/0x480 [ 716.460773][ T26] #2: ffff8880b9c20258 (&base->lock){..-.}-{2:2}, at: __mod_timer+0x60c/0xe30 [ 716.469934][ T26] #3: ffffffff903f95d8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 [ 716.480654][ T26] #4: ffffffff8b848d88 (text_mutex){+.+.}-{3:3}, at: arch_jump_label_transform_apply+0xe/0x20 [ 716.491197][ T26] 2 locks held by kworker/u5:0/150: [ 716.496455][ T26] #0: ffff88806c01e938 ((wq_completion)knbd0-recv){+.+.}-{0:0}, at: process_one_work+0x8a3/0x16b0 [ 716.507266][ T26] #1: ffffc90001707db0 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x8d7/0x16b0 [ 716.518527][ T26] 1 lock held by in:imklog/6474: [ 716.523554][ T26] [ 716.525880][ T26] ============================================= [ 716.525880][ T26] [ 716.534394][ T26] NMI backtrace for cpu 1 [ 716.538716][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 [ 716.546501][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.556545][ T26] Call Trace: [ 716.559811][ T26] dump_stack_lvl+0xcd/0x134 [ 716.564410][ T26] nmi_cpu_backtrace.cold+0x47/0x144 [ 716.569678][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.574902][ T26] nmi_trigger_cpumask_backtrace+0x1ae/0x220 [ 716.580918][ T26] watchdog+0xc1d/0xf50 [ 716.585067][ T26] ? reset_hung_task_detector+0x30/0x30 [ 716.590592][ T26] kthread+0x3e5/0x4d0 [ 716.594685][ T26] ? set_kthread_struct+0x130/0x130 [ 716.599867][ T26] ret_from_fork+0x1f/0x30 [ 716.604410][ T26] Sending NMI from CPU 1 to CPUs 0: [ 716.609625][ C0] NMI backtrace for cpu 0 [ 716.609636][ C0] CPU: 0 PID: 2968 Comm: systemd-journal Not tainted 5.14.0-syzkaller #0 [ 716.609658][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.609675][ C0] RIP: 0010:__reset_page_owner+0x93/0x170 [ 716.609751][ C0] Code: ae 8b 41 d3 e5 48 c1 e8 03 4c 01 f0 48 89 44 24 08 eb 77 e8 5f d2 b1 ff be 08 00 00 00 48 89 df e8 f2 9a f8 ff 48 0f ba 33 01 <48> 8b 05 36 5e ea 09 48 01 d8 48 8d 78 0c 48 89 fa 48 c1 ea 03 42 [ 716.609771][ C0] RSP: 0018:ffffc90002267c40 EFLAGS: 00000047 [ 716.609787][ C0] RAX: 0000000000000001 RBX: ffff888014319fd0 RCX: ffffffff81c371de [ 716.609801][ C0] RDX: ffffed10028633fb RSI: 0000000000000008 RDI: ffff888014319fd0 [ 716.609814][ C0] RBP: 0000000000000001 R08: 0000000000000001 R09: ffff888014319fd7 [ 716.609827][ C0] R10: ffffed10028633fa R11: 0000000000086089 R12: 0000000000000001 [ 716.609840][ C0] R13: 0000000000000002 R14: dffffc0000000000 R15: 000000a6d942eacc [ 716.609854][ C0] FS: 00007f67e33e58c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 716.609874][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.609888][ C0] CR2: 00007f67e07ca000 CR3: 0000000079091000 CR4: 00000000001506f0 [ 716.609901][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.609913][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.609926][ C0] Call Trace: [ 716.609931][ C0] ? free_tail_pages_check+0x180/0x2d0 [ 716.609970][ C0] free_pcp_prepare+0x2c5/0x780 [ 716.609994][ C0] free_unref_page+0x19/0x690 [ 716.610014][ C0] slabs_destroy+0x89/0xc0 [ 716.610067][ C0] ___cache_free+0x4c6/0x610 [ 716.610086][ C0] ? lock_downgrade+0x6e0/0x6e0 [ 716.610106][ C0] ? qlist_free_all+0x9a/0x110 [ 716.610124][ C0] qlist_free_all+0x4e/0x110 [ 716.610142][ C0] kasan_quarantine_reduce+0x180/0x200 [ 716.610162][ C0] __kasan_slab_alloc+0x92/0xa0 [ 716.610184][ C0] kmem_cache_alloc+0x25f/0x540 [ 716.610205][ C0] getname_flags.part.0+0x50/0x4f0 [ 716.610228][ C0] __x64_sys_mkdir+0xda/0x140 [ 716.610248][ C0] do_syscall_64+0x35/0xb0 [ 716.610268][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 716.610293][ C0] RIP: 0033:0x7f67e26a0687 [ 716.610308][ C0] Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 [ 716.610327][ C0] RSP: 002b:00007ffd04c1fac8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 [ 716.610345][ C0] RAX: ffffffffffffffda RBX: 00007ffd04c229e0 RCX: 00007f67e26a0687 [ 716.610359][ C0] RDX: 00007f67e3111a00 RSI: 00000000000001ed RDI: 00005568137f98c0 [ 716.610372][ C0] RBP: 00007ffd04c1fb00 R08: 0000000000000000 R09: 0000000000000000 [ 716.610385][ C0] R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 [ 716.610397][ C0] R13: 0000000000000000 R14: 00007ffd04c229e0 R15: 00007ffd04c1fff0 [ 716.610621][ T26] Kernel panic - not syncing: hung_task: blocked tasks [ 716.899090][ T26] CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.14.0-syzkaller #0 [ 716.906891][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.916936][ T26] Call Trace: [ 716.920206][ T26] dump_stack_lvl+0xcd/0x134 [ 716.924796][ T26] panic+0x2b0/0x6dd [ 716.928709][ T26] ? __warn_printk+0xf3/0xf3 [ 716.933468][ T26] ? lapic_can_unplug_cpu+0x80/0x80 [ 716.938668][ T26] ? _flat_send_IPI_mask+0x53/0x60 [ 716.943774][ T26] ? watchdog.cold+0x130/0x158 [ 716.948559][ T26] watchdog.cold+0x141/0x158 [ 716.953152][ T26] ? reset_hung_task_detector+0x30/0x30 [ 716.958699][ T26] kthread+0x3e5/0x4d0 [ 716.962765][ T26] ? set_kthread_struct+0x130/0x130 [ 716.967961][ T26] ret_from_fork+0x1f/0x30 [ 716.972770][ T26] Kernel Offset: disabled [ 716.977088][ T26] Rebooting in 86400 seconds..