no interfaces have a carrier Starting sshd: OK syzkaller syzkaller login: [ 14.285841][ T22] kauditd_printk_skb: 60 callbacks suppressed [ 14.285846][ T22] audit: type=1400 audit(1635264057.450:71): avc: denied { transition } for pid=266 comm="sshd" path="/bin/sh" dev="sda1" ino=73 scontext=system_u:system_r:initrc_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 14.293549][ T22] audit: type=1400 audit(1635264057.450:72): avc: denied { write } for pid=266 comm="sh" path="pipe:[10645]" dev="pipefs" ino=10645 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 15.473875][ T267] sshd (267) used greatest stack depth: 26904 bytes left Warning: Permanently added '10.128.0.150' (ECDSA) to the list of known hosts. executing program [ 21.209393][ T22] audit: type=1400 audit(1635264064.370:73): avc: denied { execmem } for pid=299 comm="syz-executor594" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.228927][ T22] audit: type=1400 audit(1635264064.370:74): avc: denied { mounton } for pid=300 comm="syz-executor594" 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 [ 21.253104][ T22] audit: type=1400 audit(1635264064.380:75): avc: denied { mount } for pid=300 comm="syz-executor594" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.259001][ T300] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 21.275856][ T22] audit: type=1400 audit(1635264064.380:76): avc: denied { mounton } for pid=300 comm="syz-executor594" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [ 21.298434][ T300] EXT4-fs error (device loop0): __ext4_new_inode:929: comm syz-executor594: reserved inode found cleared - inode=1 [ 21.306108][ T22] audit: type=1400 audit(1635264064.400:77): avc: denied { read write } for pid=300 comm="syz-executor594" name="loop0" dev="devtmpfs" ino=9367 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.318313][ T300] incfs: Can't find or create .index dir in ./file0 [ 21.342647][ T22] audit: type=1400 audit(1635264064.400:78): avc: denied { open } for pid=300 comm="syz-executor594" path="/dev/loop0" dev="devtmpfs" ino=9367 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.373565][ T22] audit: type=1400 audit(1635264064.400:79): avc: denied { ioctl } for pid=300 comm="syz-executor594" path="/dev/loop0" dev="devtmpfs" ino=9367 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.373714][ T300] BUG: Dentry ffff8881e6aaa770{i=0,n=.index} still in use (1) [unmount of ext4 loop0] [ 21.399508][ T22] audit: type=1400 audit(1635264064.400:80): avc: denied { mounton } for pid=300 comm="syz-executor594" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.399523][ T22] audit: type=1400 audit(1635264064.450:81): avc: denied { mount } for pid=300 comm="syz-executor594" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.399537][ T22] audit: type=1400 audit(1635264064.460:82): avc: denied { mounton } for pid=300 comm="syz-executor594" path="/root/file0" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.477831][ T300] ------------[ cut here ]------------ [ 21.483507][ T300] WARNING: CPU: 1 PID: 300 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 21.491888][ T300] Modules linked in: [ 21.495770][ T300] CPU: 1 PID: 300 Comm: syz-executor594 Not tainted 5.4.147-syzkaller-00036-geb4a5a5dbd5b #0 [ 21.506085][ T300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.516140][ T300] RIP: 0010:umount_check+0x179/0x1c0 [ 21.521524][ T300] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 e0 14 c9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 b7 0e b3 ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff [ 21.541668][ T300] RSP: 0018:ffff8881de77fb78 EFLAGS: 00010286 [ 21.547836][ T300] RAX: 0000000000000054 RBX: ffffffff85daa5c0 RCX: f524e38aa601db00 [ 21.556483][ T300] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 21.564513][ T300] RBP: ffff8881de15a420 R08: ffffffff814b2a4c R09: ffffed103ede9608 [ 21.572678][ T300] R10: ffffed103ede9608 R11: 0000000000000000 R12: dffffc0000000000 [ 21.580642][ T300] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6aaa770 [ 21.588601][ T300] FS: 00005555572a4300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.597507][ T300] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.604069][ T300] CR2: 00007ff058cf41d0 CR3: 00000001ed562000 CR4: 00000000003406e0 [ 21.612023][ T300] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.619973][ T300] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.627922][ T300] Call Trace: [ 21.631210][ T300] d_walk+0x2d9/0x540 [ 21.635270][ T300] ? __d_free+0x20/0x20 [ 21.639416][ T300] shrink_dcache_for_umount+0x8a/0x1a0 [ 21.645415][ T300] generic_shutdown_super+0x63/0x2a0 [ 21.650693][ T300] kill_block_super+0x79/0xd0 [ 21.655353][ T300] deactivate_locked_super+0xaf/0x100 [ 21.660704][ T300] deactivate_super+0x168/0x210 [ 21.665538][ T300] cleanup_mnt+0x432/0x4e0 [ 21.669941][ T300] task_work_run+0x186/0x1b0 [ 21.674540][ T300] do_exit+0xc0a/0x2aa0 [ 21.678698][ T300] do_group_exit+0x15c/0x2c0 [ 21.683286][ T300] ? do_user_addr_fault+0x6b0/0xb40 [ 21.688466][ T300] __do_sys_exit_group+0x13/0x20 [ 21.693404][ T300] __se_sys_exit_group+0x10/0x10 [ 21.698323][ T300] __x64_sys_exit_group+0x37/0x40 [ 21.703332][ T300] do_syscall_64+0xcb/0x1e0 [ 21.707821][ T300] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.713693][ T300] RIP: 0033:0x7ff058c7f019 [ 21.718085][ T300] Code: Bad RIP value. [ 21.722154][ T300] RSP: 002b:00007fffb48d4768 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 21.730670][ T300] RAX: ffffffffffffffda RBX: 00007ff058cf3330 RCX: 00007ff058c7f019 [ 21.738810][ T300] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 21.746766][ T300] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007ff058cede40 [ 21.754807][ T300] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff058