[ 17.154836][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #80!!! Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. [ 17.934784][ T0] NOHZ tick-stop error: Non-RCU local softirq work is pending, handler #280!!! executing program [ 18.012447][ T23] audit: type=1400 audit(1635384853.269:73): avc: denied { execmem } for pid=365 comm="syz-executor323" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 18.031932][ T23] audit: type=1400 audit(1635384853.269:74): avc: denied { mounton } for pid=366 comm="syz-executor323" path="/sys/fs/fuse/connections" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=dir permissive=1 [ 18.037938][ T366] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 18.055929][ T23] audit: type=1400 audit(1635384853.269:75): avc: denied { mount } for pid=366 comm="syz-executor323" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 18.085309][ T366] EXT4-fs error (device loop0): __ext4_new_inode:1072: comm syz-executor323: reserved inode found cleared - inode=1 [ 18.087361][ T23] audit: type=1400 audit(1635384853.269:76): avc: denied { mounton } for pid=366 comm="syz-executor323" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [ 18.099842][ T366] incfs: Can't find or create .index dir in ./file0 [ 18.120898][ T23] audit: type=1400 audit(1635384853.289:77): avc: denied { read write } for pid=366 comm="syz-executor323" name="loop0" dev="devtmpfs" ino=115 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.151692][ T23] audit: type=1400 audit(1635384853.289:78): avc: denied { open } for pid=366 comm="syz-executor323" path="/dev/loop0" dev="devtmpfs" ino=115 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.151945][ T366] BUG: Dentry ffff88811999d440{i=0,n=.index} still in use (1) [unmount of ext4 loop0] [ 18.175950][ T23] audit: type=1400 audit(1635384853.289:79): avc: denied { ioctl } for pid=366 comm="syz-executor323" path="/dev/loop0" dev="devtmpfs" ino=115 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 18.185459][ T366] ------------[ cut here ]------------ [ 18.211266][ T23] audit: type=1400 audit(1635384853.289:80): avc: denied { mounton } for pid=366 comm="syz-executor323" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 18.216515][ T366] WARNING: CPU: 1 PID: 366 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 [ 18.239274][ T23] audit: type=1400 audit(1635384853.329:81): avc: denied { mount } for pid=366 comm="syz-executor323" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 18.247456][ T366] Modules linked in: [ 18.269433][ T23] audit: type=1400 audit(1635384853.349:82): avc: denied { mounton } for pid=366 comm="syz-executor323" path="/root/file0" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 18.273111][ T366] CPU: 1 PID: 366 Comm: syz-executor323 Not tainted 5.10.76-syzkaller-01178-g4944ec82ebb9 #0 [ 18.306177][ T366] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.316263][ T366] RIP: 0010:umount_check+0x18d/0x1d0 [ 18.321531][ T366] Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 00 40 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 5e d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff [ 18.341152][ T366] RSP: 0018:ffffc9000027fab8 EFLAGS: 00010286 [ 18.347224][ T366] RAX: 0000000000000054 RBX: ffffffff86690d40 RCX: 95e2ab99d996f100 [ 18.355396][ T366] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 18.363355][ T366] RBP: ffffc9000027fae8 R08: ffffffff81545288 R09: 0000000000000003 [ 18.371356][ T366] R10: fffff5200004fea9 R11: 0000000000000004 R12: ffff88811999d440 [ 18.379327][ T366] R13: dffffc0000000000 R14: ffff888106fa43f8 R15: 0000000000000001 [ 18.387304][ T366] FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 18.396233][ T366] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.402790][ T366] CR2: 00007f64c194d1d0 CR3: 000000010c2a9000 CR4: 00000000003506a0 [ 18.410838][ T366] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.418897][ T366] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.426865][ T366] Call Trace: [ 18.430161][ T366] d_walk+0x309/0x540 [ 18.434117][ T366] ? __d_free+0x30/0x30 [ 18.438275][ T366] shrink_dcache_for_umount+0x8e/0x1b0 [ 18.443721][ T366] generic_shutdown_super+0x66/0x2c0 [ 18.449002][ T366] kill_block_super+0x80/0xe0 [ 18.453657][ T366] deactivate_locked_super+0xb0/0x100 [ 18.459032][ T366] deactivate_super+0xa5/0xd0 [ 18.463693][ T366] cleanup_mnt+0x45f/0x510 [ 18.468103][ T366] __cleanup_mnt+0x19/0x20 [ 18.472499][ T366] task_work_run+0x147/0x1b0 [ 18.477104][ T366] do_exit+0x70e/0x23a0 [ 18.481261][ T366] ? vmacache_update+0xb7/0x120 [ 18.486118][ T366] ? mm_update_next_owner+0x6e0/0x6e0 [ 18.491483][ T366] ? do_user_addr_fault+0x863/0xd70 [ 18.496681][ T366] do_group_exit+0x16a/0x2d0 [ 18.501256][ T366] __do_sys_exit_group+0x17/0x20 [ 18.506275][ T366] __se_sys_exit_group+0x14/0x20 [ 18.511198][ T366] __x64_sys_exit_group+0x3b/0x40 [ 18.516225][ T366] do_syscall_64+0x31/0x70 [ 18.520635][ T366] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 18.526536][ T366] RIP: 0033:0x7f64c18d8019 [ 18.530938][ T366] Code: Unable to access opcode bytes at RIP 0x7f64c18d7fef. [ 18.538494][ T366] RSP: 002b:00007ffd3ce46bf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 18.546917][ T366] RAX: ffffffffffffffda RBX: 00007f64c194c330 RCX: 00007f64c18d8019 [ 18.554897][ T366] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 18.562866][ T366] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007f64c1946e40 [ 18.570838][ T366] R10: 0000000000000011 R11: 0000000000000246 R12: 00007f64c194c330 [ 18.578820][ T366] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 18.586788][ T366] ---[ end trace f09152e246402872 ]--- [ 18.593298][ T366] VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...