Starting Permit User Sessions... Starting OpenBSD Secure Shell server... [ OK ] Started Permit User Sessions. [ OK ] Started Getty on tty1. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty4. [ OK ] Started OpenBSD Secure Shell server. Warning: Permanently added '10.128.1.99' (ECDSA) to the list of known hosts. executing program [* ] A start job is running for dev-ttyS0.device (8s / 1min 30s)[** ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[*** ] A start job is running for dev-ttyS0.device (9s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (10s / 1min 30s)[ 18.065720][ T22] audit: type=1400 audit(1627273953.601:8): avc: denied { execmem } for pid=339 comm="syz-executor919" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 18.098759][ T341] EXT4-fs (loop0): Test dummy encryption mode enabled [ 18.107218][ T341] EXT4-fs (loop0): mounted filesystem without journal. Opts: test_dummy_encryption,noload,,errors=continue [ 18.124243][ T341] fscrypt: AES-256-CTS-CBC using implementation "cts(cbc-aes-aesni)" [ 18.132639][ T341] incfs: Can't find or create .index dir in ./file0 [ 18.140034][ T341] BUG: Dentry ffff8881eca98aa0{i=0,n=.index} still in use (1) [unmount of ext4 loop0] [ 18.149720][ T341] ------------[ cut here ]------------ [ 18.155353][ T341] WARNING: CPU: 1 PID: 341 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 18.163650][ T341] Modules linked in: [ 18.167691][ T341] CPU: 1 PID: 341 Comm: syz-executor919 Not tainted 5.4.125-syzkaller-00006-gc0f594e44e6e #0 [ 18.177824][ T341] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 18.187887][ T341] RIP: 0010:umount_check+0x179/0x1c0 [ 18.193155][ T341] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 e0 09 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 af 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 [ 18.212827][ T341] RSP: 0018:ffff8881e5a9fa58 EFLAGS: 00010282 [ 18.218882][ T341] RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: 698c4e212e468900 [ 18.226999][ T341] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 18.236416][ T341] RBP: ffff8881e54cf420 R08: ffffffff814e90d7 R09: ffffed103ede9608 [ 18.244365][ T341] R10: ffffed103ede9608 R11: 0000000000000000 R12: dffffc0000000000 [ 18.252316][ T341] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881eca98aa0 [ 18.260356][ T341] FS: 0000000000892300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 18.269769][ T341] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 18.276403][ T341] CR2: 00000000004b51d0 CR3: 0000000005e0e000 CR4: 00000000001406e0 [ 18.284356][ T341] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 18.292310][ T341] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 18.301731][ T341] Call Trace: [ 18.305013][ T341] d_walk+0x2d9/0x540 [ 18.309096][ T341] ? __d_free+0x20/0x20 [ 18.313233][ T341] shrink_dcache_for_umount+0x8a/0x1a0 [ 18.318872][ T341] generic_shutdown_super+0x63/0x2a0 [ 18.324144][ T341] kill_block_super+0x79/0xd0 [ 18.328809][ T341] deactivate_locked_super+0xaf/0x100 [ 18.334167][ T341] deactivate_super+0x1b3/0x270 [ 18.339086][ T341] ? deactivate_locked_super+0x100/0x100 [ 18.344794][ T341] ? dput+0x4de/0x5d0 [ 18.348842][ T341] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 18.353927][ T341] ? find_next_bit+0xc6/0x110 [ 18.358628][ T341] cleanup_mnt+0x432/0x4e0 [ 18.363026][ T341] task_work_run+0x186/0x1b0 [ 18.368022][ T341] do_exit+0xcb9/0x2bf0 [ 18.372156][ T341] ? mm_update_next_owner+0x5c0/0x5c0 [ 18.377523][ T341] ? __up_read+0x6f/0x1b0 [ 18.381829][ T341] ? __down_read+0x210/0x210 [ 18.386501][ T341] ? check_preemption_disabled+0x154/0x330 [ 18.392281][ T341] ? debug_smp_processor_id+0x20/0x20 [ 18.397624][ T341] do_group_exit+0x15c/0x2c0 [ 18.402205][ T341] ? do_user_addr_fault+0x6b0/0xb40 [ 18.407672][ T341] __do_sys_exit_group+0x13/0x20 [ 18.412593][ T341] __se_sys_exit_group+0x10/0x10 [ 18.417605][ T341] __x64_sys_exit_group+0x37/0x40 [ 18.422616][ T341] do_syscall_64+0xcb/0x1e0 [ 18.427106][ T341] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 18.432970][ T341] RIP: 0033:0x442ee9 [ 18.437228][ T341] Code: Bad RIP value. [ 18.441375][ T341] RSP: 002b:00007ffc987b6538 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 18.450856][ T341] RAX: ffffffffffffffda RBX: 00000000004b42f0 RCX: 0000000000442ee9 [ 18.458978][ T341] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 1