EXT4-fs (loop0): unmounting filesystem 00000000-0000-0000-0000-000000000000. VFS: Busy inodes after unmount of loop0 (ext4) ------------[ cut here ]------------ kernel BUG at fs/super.c:502! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5356 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller-00002-g6dc4aa72ed47 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 RIP: 0010:generic_shutdown_super+0x3bb/0x480 fs/super.c:502 Code: 6b 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 c4 00 00 00 48 8b 55 00 48 8d b3 a8 06 00 00 48 c7 c7 20 ca 5b 8a e8 d5 99 81 ff <0f> 0b e8 3e 7d f0 ff e9 6a fc ff ff e8 34 7d f0 ff e9 f1 fd ff ff RSP: 0018:ffffc90005167d90 EFLAGS: 00010282 RAX: 000000000000002e RBX: ffff88802c0ca000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168b8fc RDI: 0000000000000005 RBP: ffffffff8ca214a0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88802c0ca7d8 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888029c719c0 FS: 000055555557b400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ece980440 CR3: 0000000021a7f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kill_block_super+0xa1/0x100 fs/super.c:1407 deactivate_locked_super+0x98/0x160 fs/super.c:331 deactivate_super+0xb1/0xd0 fs/super.c:362 cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177 task_work_run+0x16f/0x270 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x210/0x240 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297 do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f566348d5d7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd8a348f88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f566348d5d7 RDX: 00007ffd8a349059 RSI: 000000000000000a RDI: 00007ffd8a349050 RBP: 00007ffd8a349050 R08: 00000000ffffffff R09: 00007ffd8a348e20 R10: 000055555557c893 R11: 0000000000000246 R12: 00007f56634e6cdc R13: 00007ffd8a34a110 R14: 000055555557c810 R15: 00007ffd8a34a150 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:generic_shutdown_super+0x3bb/0x480 fs/super.c:502 Code: 6b 28 48 89 ea 48 c1 ea 03 80 3c 02 00 0f 85 c4 00 00 00 48 8b 55 00 48 8d b3 a8 06 00 00 48 c7 c7 20 ca 5b 8a e8 d5 99 81 ff <0f> 0b e8 3e 7d f0 ff e9 6a fc ff ff e8 34 7d f0 ff e9 f1 fd ff ff RSP: 0018:ffffc90005167d90 EFLAGS: 00010282 RAX: 000000000000002e RBX: ffff88802c0ca000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8168b8fc RDI: 0000000000000005 RBP: ffffffff8ca214a0 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000001 R12: ffff88802c0ca7d8 R13: 0000000000000000 R14: 0000000000000000 R15: ffff888029c719c0 FS: 000055555557b400(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6ece980440 CR3: 0000000021a7f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400