BUG: Dentry ffff88811a0a1110{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 365 Comm: syz-executor977 Not tainted 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: fffff5200017eeb9 R10: fffff5200017eeb9 R11: 0000000000000000 R12: ffff88811a0a1110 R13: dffffc0000000000 R14: ffff8881069d03f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000b15c RCX: 00007fb6577ac377 RDX: 00007fff3432da69 RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000007 ---[ end trace a965d9ac4e98a338 ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a1b6550{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee095d8 R10: ffffed103ee095d8 R11: 0000000000000000 R12: ffff88811a1b6550 R13: dffffc0000000000 R14: ffff88810a3a93f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000b60b RCX: 00007fb6577ac377 RDX: 00007fff3432da69 RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000009 ---[ end trace a965d9ac4e98a339 ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a22aee0{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee095d8 R10: ffffed103ee095d8 R11: 0000000000000000 R12: ffff88811a22aee0 R13: dffffc0000000000 R14: ffff88810a3a83f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000bd8a RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 000000000000000d ---[ end trace a965d9ac4e98a33a ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a230550{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee095d8 R10: ffffed103ee095d8 R11: 0000000000000000 R12: ffff88811a230550 R13: dffffc0000000000 R14: ffff88810a6e23f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000c57e RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000011 ---[ end trace a965d9ac4e98a33b ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a230880{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 1 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff88811a230880 R13: dffffc0000000000 R14: ffff88810a6e73f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000c858 RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000012 ---[ end trace a965d9ac4e98a33c ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a1feaa0{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 1 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000080000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff88811a1feaa0 R13: dffffc0000000000 R14: ffff88810a6e33f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000cb2c RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000013 ---[ end trace a965d9ac4e98a33d ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff888108ed5330{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 1 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 1 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee295d8 R10: ffffed103ee295d8 R11: 0000000000000000 R12: ffff888108ed5330 R13: dffffc0000000000 R14: ffff88810a6e63f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000cdf4 RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000014 ---[ end trace a965d9ac4e98a33e ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... BUG: Dentry ffff88811a237220{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 365 at fs/dcache.c:1616 umount_check+0x18d/0x1d0 fs/dcache.c:1607 Modules linked in: CPU: 0 PID: 365 Comm: syz-executor977 Tainted: G W 5.10.75-syzkaller-01082-g234d53d2bb60 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x18d/0x1d0 fs/dcache.c:1607 Code: 8b 0b 49 81 c6 f8 03 00 00 48 c7 c7 40 43 2e 85 4c 89 e6 48 8b 55 d0 4c 89 e1 45 89 f8 31 c0 41 56 e8 ae d9 9e ff 48 83 c4 08 <0f> 0b e9 f1 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c c9 fe ff RSP: 0018:ffffc90000bf7c78 EFLAGS: 00010286 RAX: 0000000000000054 RBX: ffffffff866b3380 RCX: 9f8f4fd1ceadc900 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000bf7ca8 R08: ffffffff81545368 R09: ffffed103ee095d8 R10: ffffed103ee095d8 R11: 0000000000000000 R12: ffff88811a237220 R13: dffffc0000000000 R14: ffff88810a6e43f8 R15: 0000000000000001 FS: 000055555592b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555555934628 CR3: 00000001079f8000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x309/0x540 fs/dcache.c:1326 do_one_tree fs/dcache.c:1623 [inline] shrink_dcache_for_umount+0x8e/0x1b0 fs/dcache.c:1639 generic_shutdown_super+0x66/0x2c0 fs/super.c:447 kill_block_super+0x80/0xe0 fs/super.c:1446 deactivate_locked_super+0xb0/0x100 fs/super.c:335 deactivate_super+0xa5/0xd0 fs/super.c:366 cleanup_mnt+0x45f/0x510 fs/namespace.c:1118 __cleanup_mnt+0x19/0x20 fs/namespace.c:1125 task_work_run+0x147/0x1b0 kernel/task_work.c:154 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_user_mode_loop kernel/entry/common.c:164 [inline] exit_to_user_mode_prepare+0xc3/0xe0 kernel/entry/common.c:191 syscall_exit_to_user_mode+0x24/0x40 kernel/entry/common.c:266 do_syscall_64+0x3d/0x70 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb6577ac377 Code: 07 00 48 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff3432d9a8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000d0c3 RCX: 00007fb6577ac377 RDX: 00007fff3432da6a RSI: 0000000000000002 RDI: 00007fff3432da60 RBP: 00007fff3432da60 R08: 00000000ffffffff R09: 00007fff3432d840 R10: 000055555592c633 R11: 0000000000000202 R12: 00007fff3432eae0 R13: 000055555592c5f0 R14: 00007fff3432d9d0 R15: 0000000000000015 ---[ end trace a965d9ac4e98a33f ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day...