Starting sshd: OK syzkaller syzkaller login: [ 14.232159][ T22] kauditd_printk_skb: 37 callbacks suppressed [ 14.232168][ T22] audit: type=1400 audit(1635244789.600:71): avc: denied { transition } for pid=264 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 [ 14.236229][ T22] audit: type=1400 audit(1635244789.600:72): avc: denied { write } for pid=264 comm="sh" path="pipe:[720]" dev="pipefs" ino=720 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:initrc_t tclass=fifo_file permissive=1 [ 15.032501][ T266] sshd (266) used greatest stack depth: 26904 bytes left [ 15.350817][ T272] sshd (272) used greatest stack depth: 25480 bytes left Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. executing program [ 20.845198][ T22] audit: type=1400 audit(1635244796.210:73): avc: denied { execmem } for pid=298 comm="syz-executor508" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.868294][ T22] audit: type=1400 audit(1635244796.240:74): avc: denied { mounton } for pid=299 comm="syz-executor508" 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 [ 20.888709][ T301] ====================================================== [ 20.888709][ T301] WARNING: the mand mount option is being deprecated and [ 20.888709][ T301] will be removed in v5.15! [ 20.888709][ T301] ====================================================== [ 20.894059][ T22] audit: type=1400 audit(1635244796.240:75): avc: denied { mount } for pid=299 comm="syz-executor508" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [ 20.941117][ T22] audit: type=1400 audit(1635244796.240:76): avc: denied { mounton } for pid=299 comm="syz-executor508" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [ 20.950962][ T301] incfs: Can't find or create .incomplete dir in ./file0 [ 20.962964][ T22] audit: type=1400 audit(1635244796.240:77): avc: denied { read write } for pid=299 comm="syz-executor508" name="loop0" dev="devtmpfs" ino=9363 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.993987][ T22] audit: type=1400 audit(1635244796.240:78): avc: denied { open } for pid=299 comm="syz-executor508" path="/dev/loop0" dev="devtmpfs" ino=9363 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.994082][ T303] BUG: Dentry ffff8881e6ec5dd0{i=0,n=.incomplete} still in use (1) [unmount of vfat loop0] [ 21.018605][ T22] audit: type=1400 audit(1635244796.240:79): avc: denied { ioctl } for pid=299 comm="syz-executor508" path="/dev/loop0" dev="devtmpfs" ino=9363 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 21.028672][ T303] ------------[ cut here ]------------ [ 21.054272][ T22] audit: type=1400 audit(1635244796.240:80): avc: denied { mounton } for pid=299 comm="syz-executor508" path="/root/file0" dev="sda1" ino=1137 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.059651][ T303] WARNING: CPU: 1 PID: 303 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 21.082437][ T22] audit: type=1400 audit(1635244796.310:81): avc: denied { mount } for pid=299 comm="syz-executor508" name="/" dev="loop0" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=filesystem permissive=1 [ 21.090662][ T303] Modules linked in: [ 21.090674][ T303] CPU: 1 PID: 303 Comm: syz-executor508 Not tainted 5.4.147-syzkaller-00036-geb4a5a5dbd5b #0 [ 21.090677][ T303] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 21.090697][ T303] RIP: 0010:umount_check+0x179/0x1c0 [ 21.112772][ T22] audit: type=1400 audit(1635244796.310:82): avc: denied { mounton } for pid=299 comm="syz-executor508" path="/root/file0" dev="loop0" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:dosfs_t tclass=dir permissive=1 [ 21.116609][ T303] 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 [ 21.184569][ T303] RSP: 0018:ffff8881de027980 EFLAGS: 00010292 [ 21.190612][ T303] RAX: 0000000000000059 RBX: ffffffff85dc6240 RCX: 92fa51d5b5e69500 [ 21.198562][ T303] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 21.206503][ T303] RBP: ffff8881de7b0420 R08: ffffffff814b2a4c R09: ffffed103bc04ee9 [ 21.214451][ T303] R10: ffffed103bc04ee9 R11: 0000000000000000 R12: dffffc0000000000 [ 21.222397][ T303] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6ec5dd0 [ 21.230345][ T303] FS: 00007f679aaba700(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.239247][ T303] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.245799][ T303] CR2: 00007f679ab7f468 CR3: 00000001ed7d2000 CR4: 00000000003406e0 [ 21.253753][ T303] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.261700][ T303] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.269648][ T303] Call Trace: [ 21.272914][ T303] d_walk+0x2d9/0x540 [ 21.276866][ T303] ? __d_free+0x20/0x20 [ 21.280986][ T303] shrink_dcache_for_umount+0x8a/0x1a0 [ 21.286534][ T303] generic_shutdown_super+0x63/0x2a0 [ 21.291821][ T303] kill_block_super+0x79/0xd0 [ 21.296471][ T303] deactivate_locked_super+0xaf/0x100 [ 21.301811][ T303] deactivate_super+0x168/0x210 [ 21.306646][ T303] cleanup_mnt+0x432/0x4e0 [ 21.311036][ T303] task_work_run+0x186/0x1b0 [ 21.315597][ T303] do_exit+0xc0a/0x2aa0 [ 21.319722][ T303] do_group_exit+0x15c/0x2c0 [ 21.324287][ T303] get_signal+0x150f/0x1e00 [ 21.328765][ T303] do_signal+0x3b/0x580 [ 21.332892][ T303] prepare_exit_to_usermode+0x207/0x310 [ 21.338409][ T303] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.344270][ T303] RIP: 0033:0x7f679ab2e449 [ 21.348653][ T303] Code: Bad RIP value. [ 21.352687][ T303] RSP: 002b:00007f679aaba2f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 21.361074][ T303] RAX: fffffffffffffe00 RBX: 00007f679abb34b0 RCX: 00007f679ab2e449 [ 21.369019][ T303] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f679abb34b8 [ 21.376973][ T303] RBP: 0030656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 21.384912][ T303] R10: 0000000000000000 R11: 0000000000000246 R12: 6d616e74726f6873 [ 21.392855][ T303] R13: 66666f5f656d6974 R14: 6e656d6572636e69 R15: 00007f679abb34b8 [ 21.400797][ T303] ---[ end trace 00354e360a9ea185 ]--- [ 21.407166][ T303] VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...