forked to background, child pid 193 Starting sshd: OK [ 8.271441][ T134] rcS (134) used greatest stack depth: 26632 bytes left syzkaller syzkaller login: [ 14.638270][ T22] kauditd_printk_skb: 37 callbacks suppressed [ 14.638276][ T22] audit: type=1400 audit(1634924924.850:71): avc: denied { transition } for pid=265 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 [ 14.645427][ T22] audit: type=1400 audit(1634924924.860:72): avc: denied { write } for pid=265 comm="sh" path="pipe:[658]" dev="pipefs" ino=658 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 Warning: Permanently added '10.128.1.61' (ECDSA) to the list of known hosts. executing program [ 21.368898][ T22] audit: type=1400 audit(1634924931.580:73): avc: denied { execmem } for pid=299 comm="syz-executor128" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.390135][ T22] audit: type=1400 audit(1634924931.590:74): avc: denied { mounton } for pid=301 comm="syz-executor128" 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 [ 21.402217][ T301] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 21.414572][ T22] audit: type=1400 audit(1634924931.590:75): avc: denied { mount } for pid=301 comm="syz-executor128" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 21.442668][ T301] EXT4-fs error (device loop0): __ext4_new_inode:929: comm syz-executor128: reserved inode found cleared - inode=1 [ 21.445558][ T22] audit: type=1400 audit(1634924931.590:76): avc: denied { mounton } for pid=301 comm="syz-executor128" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [ 21.457575][ T301] incfs: Can't find or create .index dir in ./file0 [ 21.479031][ T22] audit: type=1400 audit(1634924931.610:77): avc: denied { read write } for pid=301 comm="syz-executor128" name="loop0" dev="devtmpfs" ino=9355 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.509857][ T22] audit: type=1400 audit(1634924931.610:78): avc: denied { open } for pid=301 comm="syz-executor128" path="/dev/loop0" dev="devtmpfs" ino=9355 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.509980][ T301] BUG: Dentry ffff8881e6a70000{i=0,n=.index} still in use (1) [unmount of ext4 loop0] [ 21.534106][ T22] audit: type=1400 audit(1634924931.610:79): avc: denied { ioctl } for pid=301 comm="syz-executor128" path="/dev/loop0" dev="devtmpfs" ino=9355 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.543838][ T301] ------------[ cut here ]------------ [ 21.569365][ T22] audit: type=1400 audit(1634924931.610:80): avc: denied { mounton } for pid=301 comm="syz-executor128" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.574759][ T301] WARNING: CPU: 0 PID: 301 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 21.574766][ T301] Modules linked in: [ 21.598821][ T22] audit: type=1400 audit(1634924931.640:81): avc: denied { mount } for pid=301 comm="syz-executor128" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.607070][ T301] CPU: 0 PID: 301 Comm: syz-executor128 Not tainted 5.4.147-syzkaller-00036-geb4a5a5dbd5b #0 [ 21.607074][ T301] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.607085][ T301] RIP: 0010:umount_check+0x179/0x1c0 [ 21.607098][ T301] 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 [ 21.610968][ T22] audit: type=1400 audit(1634924931.660:82): avc: denied { mounton } for pid=301 comm="syz-executor128" path="/root/file0" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.632702][ T301] RSP: 0018:ffff8881de597b78 EFLAGS: 00010286 [ 21.632708][ T301] RAX: 0000000000000054 RBX: ffffffff85daa5c0 RCX: b0dda503f8d01900 [ 21.632712][ T301] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 21.632716][ T301] RBP: ffff8881de789420 R08: ffffffff814b2a4c R09: ffffed103bcb2f27 [ 21.632720][ T301] R10: ffffed103bcb2f27 R11: 0000000000000000 R12: dffffc0000000000 [ 21.632724][ T301] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6a70000 [ 21.632735][ T301] FS: 000055555713d300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.755164][ T301] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.761721][ T301] CR2: 00007fed59dfd1d0 CR3: 00000001edf67000 CR4: 00000000003406f0 [ 21.769666][ T301] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.777619][ T301] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.785560][ T301] Call Trace: [ 21.788825][ T301] d_walk+0x2d9/0x540 [ 21.792805][ T301] ? __d_free+0x20/0x20 [ 21.796946][ T301] shrink_dcache_for_umount+0x8a/0x1a0 [ 21.802382][ T301] generic_shutdown_super+0x63/0x2a0 [ 21.807640][ T301] kill_block_super+0x79/0xd0 [ 21.812303][ T301] deactivate_locked_super+0xaf/0x100 [ 21.817642][ T301] deactivate_super+0x168/0x210 [ 21.822480][ T301] cleanup_mnt+0x432/0x4e0 [ 21.826880][ T301] task_work_run+0x186/0x1b0 [ 21.831439][ T301] do_exit+0xc0a/0x2aa0 [ 21.835588][ T301] do_group_exit+0x15c/0x2c0 [ 21.840164][ T301] ? do_user_addr_fault+0x6b0/0xb40 [ 21.845344][ T301] __do_sys_exit_group+0x13/0x20 [ 21.850258][ T301] __se_sys_exit_group+0x10/0x10 [ 21.855163][ T301] __x64_sys_exit_group+0x37/0x40 [ 21.860154][ T301] do_syscall_64+0xcb/0x1e0 [ 21.864643][ T301] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.870506][ T301] RIP: 0033:0x7fed59d880a9 [ 21.874892][ T301] Code: Bad RIP value. [ 21.878924][ T301] RSP: 002b:00007ffe93191158 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 21.887315][ T301] RAX: ffffffffffffffda RBX: 00007fed59dfc330 RCX: 00007fed59d880a9 [ 21.895255][ T301] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 21.903210][ T301] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fed59df6e40 [ 21.911147][ T301] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fed59dfc330 [ 21.919088][ T301] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 21.927030][ T301] ---[ end trace 6a1fac6fa3f283c7 ]--- [ 21.934531][ T301] VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...