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 tty4. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty2. [ OK ] Started OpenBSD Secure Shell server. Warning: Permanently added '10.128.0.138' (ECDSA) to the list of known hosts. executing program [* ] 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)[ *** ] A start job is running for dev-ttyS0.device (11s / 1min 30s)[ ***] A start job is running for dev-ttyS0.device (11s / 1min 30s)[ **] A start job is running for dev-ttyS0.device (12s / 1min 30s)[ 20.425641][ T22] audit: type=1400 audit(1616482275.777:8): avc: denied { execmem } for pid=326 comm="syz-executor320" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 20.455569][ T329] FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) [ 20.465940][ T329] incfs: Can't find or create .index dir in ./file0 [ 20.474773][ T329] BUG: Dentry ffff8881efa6e330{i=0,n=.index} still in use (1) [unmount of msdos loop0] [ 20.484585][ T329] ------------[ cut here ]------------ [ 20.490053][ T329] WARNING: CPU: 0 PID: 329 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 20.498384][ T329] Modules linked in: [ 20.502268][ T329] CPU: 0 PID: 329 Comm: syz-executor320 Not tainted 5.4.107-syzkaller-00751-gc50ff8e5608b #0 [ 20.512400][ T329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.522443][ T329] RIP: 0010:umount_check+0x179/0x1c0 [ 20.527715][ T329] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 60 eb e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 87 db 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 [ 20.547314][ T329] RSP: 0018:ffff8881ead57738 EFLAGS: 00010282 [ 20.553377][ T329] RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 4f86194d576a8c00 [ 20.561362][ T329] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 20.569431][ T329] RBP: ffff8881e01bc420 R08: ffffffff814e8887 R09: ffffed103edc5e08 [ 20.577379][ T329] R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 [ 20.585341][ T329] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881efa6e330 [ 20.593306][ T329] FS: 00007ffa995fa700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 20.602249][ T329] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.602254][ T329] CR2: 00000000004d15c0 CR3: 0000000005e0e000 CR4: 00000000001406f0 [ 20.602263][ T329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.602268][ T329] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.602271][ T329] Call Trace: [ 20.602290][ T329] d_walk+0x2d9/0x540 [ 20.641205][ T329] ? __d_free+0x20/0x20 [ 20.645373][ T329] shrink_dcache_for_umount+0x8a/0x1a0 [ 20.650845][ T329] generic_shutdown_super+0x63/0x2a0 [ 20.656136][ T329] kill_block_super+0x79/0xd0 [ 20.660818][ T329] deactivate_locked_super+0xaf/0x100 [ 20.666196][ T329] deactivate_super+0x1b3/0x270 [ 20.671054][ T329] ? deactivate_locked_super+0x100/0x100 [ 20.676708][ T329] ? dput+0x4de/0x5d0 [ 20.680699][ T329] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 20.685811][ T329] ? find_next_bit+0xc6/0x110 [ 20.690481][ T329] cleanup_mnt+0x432/0x4e0 [ 20.694877][ T329] task_work_run+0x186/0x1b0 [ 20.699468][ T329] do_exit+0xcb9/0x2bf0 [ 20.703673][ T329] ? mm_update_next_owner+0x5c0/0x5c0 [ 20.709030][ T329] ? debug_smp_processor_id+0x20/0x20 [ 20.714382][ T329] ? stack_trace_snprint+0x150/0x150 [ 20.719663][ T329] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 20.724761][ T329] ? _raw_spin_lock_irqsave+0x210/0x210 [ 20.730291][ T329] do_group_exit+0x15c/0x2c0 [ 20.734861][ T329] get_signal+0x164f/0x1fc0 [ 20.739361][ T329] ? ptrace_notify+0x340/0x340 [ 20.744108][ T329] ? check_preemption_disabled+0x154/0x330 [ 20.750021][ T329] do_signal+0x8d/0x610 [ 20.754331][ T329] ? kfree+0xe0/0x660 [ 20.758337][ T329] ? signal_fault+0x1e0/0x1e0 [ 20.763141][ T329] ? ksys_mount+0xe0/0xf0 [ 20.767469][ T329] ? __x64_sys_futex+0x1d/0xf0 [ 20.772212][ T329] prepare_exit_to_usermode+0x207/0x310 [ 20.777896][ T329] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 20.783780][ T329] RIP: 0033:0x449f69 [ 20.787678][ T329] Code: Bad RIP value. [ 20.791722][ T329] RSP: 002b:00007ffa995fa308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 20.800295][ T329] RAX: fffffffffffffe00 RBX: 00000000004cb408 RCX: 0000000000449f69 [ 20.808247][ T329] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cb408 [ 20.816210][ T329] RBP: 00000000004cb400 R08: 0000000000000000 R09: 0000000000000000 [ 20.824166][ T329] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb40c [ 20.832146][ T329] R13: 0030656c69662f2e R14: 6e656d6572636e69 R15: 0000000000022000 [ 20.840104][ T329] ---[ end trace c5190d6df2ce3bee ]--- [ [0;31[ 20.845919][ T329] BUG: Dentry ffff8881efa6e330{i=0,n=.index} still in use (1) [unmount of msdos loop0] m*] A start [ 20.856922][ T329] ------------[ cut here ]------------ [ 20.863570][ T329] WARNING: CPU: 0 PID: 329 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 20.871884][ T329] Modules linked in: [ 20.875775][ T329] CPU: 0 PID: 329 Comm: syz-executor320 Tainted: G W 5.4.107-syzkaller-00751-gc50ff8e5608b #0 [ 20.887296][ T329] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 20.897363][ T329] RIP: 0010:umount_check+0x179/0x1c0 [ 20.902628][ T329] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 60 eb e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 87 db 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 [ 20.922359][ T329] RSP: 0018:ffff8881ead57738 EFLAGS: 00010282 [ 20.928411][ T329] RAX: 0000000000000055 RBX: ffffffff85fc50e0 RCX: 4f86194d576a8c00 [ 20.936380][ T329] RDX: 0000000000000000 RSI: 0000000000000003 RDI: 0000000000000000 [ 20.944379][ T329] RBP: ffff8881e01bc420 R08: ffffffff814e8887 R09: ffffed103edc5e08 [ 20.952484][ T329] R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 [ 20.960451][ T329] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881efa6e330 [ 20.968417][ T329] FS: 00007ffa995fa700(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 20.977334][ T329] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.983913][ T329] CR2: 0000000000449f3f CR3: 0000000005e0e000 CR4: 00000000001406f0 [ 20.991870][ T329] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.999834][ T329] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.007785][ T329] Call Trace: [ 21.011099][ T329] d_walk+0x2d9/0x540 [ 21.015060][ T329] ? __d_free+0x20/0x20 [ 21.019208][ T329] shrink_dcache_for_umount+0x8a/0x1a0 [ 21.024651][ T329] generic_shutdown_super+0x63/0x2a0 [ 21.029917][ T329] kill_block_super+0x79/0xd0 [ 21.034580][ T329] deactivate_locked_super+0xaf/0x100 [ 21.039940][ T329] deactivate_super+0x1b3/0x270 [ 21.044867][ T329] ? deactivate_locked_super+0x100/0x100 [ 21.050492][ T329] ? dput+0x4de/0x5d0 [ 21.054568][ T329] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.059671][ T329] ? find_next_bit+0xc6/0x110 [ 21.064336][ T329] cleanup_mnt+0x432/0x4e0 [ 21.068743][ T329] task_work_run+0x186/0x1b0 [ 21.073324][ T329] do_exit+0xcb9/0x2bf0 [ 21.077453][ T329] ? mm_update_next_owner+0x5c0/0x5c0 [ 21.082818][ T329] ? debug_smp_processor_id+0x20/0x20 [ 21.088163][ T329] ? stack_trace_snprint+0x150/0x150 [ 21.093428][ T329] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 21.098522][ T329] ? _raw_spin_lock_irqsave+0x210/0x210 [ 21.104058][ T329] do_group_exit+0x15c/0x2c0 [ 21.108627][ T329] get_signal+0x164f/0x1fc0 [ 21.113113][ T329] ? ptrace_notify+0x340/0x340 [ 21.117857][ T329] ? check_preemption_disabled+0x154/0x330 [ 21.126172][ T329] do_signal+0x8d/0x610 [ 21.130517][ T329] ? kfree+0xe0/0x660 [ 21.134496][ T329] ? signal_fault+0x1e0/0x1e0 [ 21.139169][ T329] ? ksys_mount+0xe0/0xf0 [ 21.143488][ T329] ? __x64_sys_futex+0x1d/0xf0 [ 21.148233][ T329] prepare_exit_to_usermode+0x207/0x310 [ 21.154558][ T329] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.160449][ T329] RIP: 0033:0x449f69 [ 21.164342][ T329] Code: Bad RIP value. [ 21.168421][ T329] RSP: 002b:00007ffa995fa308 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 21.176837][ T329] RAX: fffffffffffffe00 RBX: 00000000004cb408 RCX: 0000000000449f69 [ 21.184912][ T329] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000004cb408 [ 21.192870][ T329] RBP: 00000000004cb400 R08: 0000000000000000 R09: 0000000000000000 [ 21.200828][ T329] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb40c [ 21.208884][ T329] R13: 0030656c69662f2e R14: 6e656d6572636e69 R15: 0000000000022000 [ 21.216944][ T329] ---[ end trace c5190d6df2ce3bef ]--- job is running for dev-ttyS0.dev[ 21.223995][ T329] VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... ice (13s / 1min 30s)