Warning: Permanently added '10.128.0.91' (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 (8s / 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)[ **] A start job is running for dev-ttyS0.device (12s / 1min 30s)[ ***] A start job is running for dev-ttyS0.device (13s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (13s / 1min 30s)[ *** ] A start job is running for dev-ttyS0.device (14s / 1min 30s)[*** ] A start job is running for dev-ttyS0.device (14s / 1min 30s)[ 22.619375][ T22] audit: type=1400 audit(1619281940.909:8): avc: denied { execmem } for pid=336 comm="syz-executor176" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 22.648961][ T338] FAT-fs (loop0): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1) [ 22.659418][ T338] incfs: Can't find or create .index dir in ./file0 [ 22.666887][ T338] BUG: Dentry ffff8881df146000{i=0,n=.index} still in use (1) [unmount of msdos loop0] [ 22.676667][ T338] ------------[ cut here ]------------ [ 22.682113][ T338] WARNING: CPU: 1 PID: 338 at fs/dcache.c:1597 umount_check+0x179/0x1c0 [ 22.690421][ T338] Modules linked in: [ 22.694314][ T338] CPU: 1 PID: 338 Comm: syz-executor176 Not tainted 5.4.114-syzkaller-00371-gaa0556d71ff1 #0 [ 22.704423][ T338] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 22.714468][ T338] RIP: 0010:umount_check+0x179/0x1c0 [ 22.719731][ T338] Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 f4 e8 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 e3 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 [ 22.739393][ T338] RSP: 0018:ffff8881e97bfa58 EFLAGS: 00010282 [ 22.745427][ T338] RAX: 0000000000000055 RBX: ffffffff85fc5400 RCX: fedc02e8b8b25c00 [ 22.753380][ T338] RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 [ 22.761318][ T338] RBP: ffff8881f1c65420 R08: ffffffff814e8767 R09: ffffed103ede5e08 [ 22.769260][ T338] R10: ffffed103ede5e08 R11: 0000000000000000 R12: dffffc0000000000 [ 22.777204][ T338] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881df146000 [ 22.785146][ T338] FS: 000000000229f300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.794041][ T338] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.800593][ T338] CR2: 00000000004b51d0 CR3: 0000000005e0e000 CR4: 00000000001406e0 [ 22.808546][ T338] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.816495][ T338] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.824433][ T338] Call Trace: [ 22.827697][ T338] d_walk+0x2d9/0x540 [ 22.831650][ T338] ? __d_free+0x20/0x20 [ 22.835773][ T338] shrink_dcache_for_umount+0x8a/0x1a0 [ 22.841201][ T338] generic_shutdown_super+0x63/0x2a0 [ 22.846453][ T338] kill_block_super+0x79/0xd0 [ 22.851099][ T338] deactivate_locked_super+0xaf/0x100 [ 22.856448][ T338] deactivate_super+0x1b3/0x270 [ 22.861277][ T338] ? deactivate_locked_super+0x100/0x100 [ 22.866875][ T338] ? dput+0x4de/0x5d0 [ 22.870827][ T338] ? _raw_spin_lock_irq+0xa4/0x1b0 [ 22.875917][ T338] ? find_next_bit+0xc6/0x110 [ 22.880564][ T338] cleanup_mnt+0x432/0x4e0 [ 22.884951][ T338] task_work_run+0x186/0x1b0 [ 22.889521][ T338] do_exit+0xcb9/0x2bf0 [ 22.893658][ T338] ? mm_update_next_owner+0x5c0/0x5c0 [ 22.898997][ T338] ? __up_read+0x6f/0x1b0 [ 22.903307][ T338] ? __down_read+0x210/0x210 [ 22.907866][ T338] ? check_preemption_disabled+0x154/0x330 [ 22.913642][ T338] ? debug_smp_processor_id+0x20/0x20 [ 22.918990][ T338] do_group_exit+0x15c/0x2c0 [ 22.923549][ T338] ? do_user_addr_fault+0x6b0/0xb40 [ 22.928716][ T338] __do_sys_exit_group+0x13/0x20 [ 22.933620][ T338] __se_sys_exit_group+0x10/0x10 [ 22.938527][ T338] __x64_sys_exit_group+0x37/0x40 [ 22.943532][ T338] do_syscall_64+0xcb/0x1e0 [ 22.948001][ T338] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 22.953873][ T338] RIP: 0033:0x442e39 [ 22.957746][ T338] Code: Bad RIP value. [ 22.961779][ T338] RSP: 002b:00007ffc09be4e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 22.970156][ T338] RAX: ffffffffffffffda RBX: 00000000004b42f0 RCX: 0000000000442e39 [ 22.978097][ T338] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 22.986047][ T338] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00000000004af000 [ 22.993998][ T338] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b42f0 [ 23.001950][ T338] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 23.009893][ T338] ---[ end trace 8fa6a4b1953fc6ca ]--- [** [ 23.017394][ T338] VFS: Busy