------------[ cut here ]------------ BUG: Dentry 00000000b763b4b5{i=1b78,n=Boot0001-8be4df61-93ca-11d2-aa0d-00e098032b8c} still in use (2) [unmount of efivarfs efivarfs] WARNING: CPU: 0 PID: 6826 at fs/dcache.c:1572 umount_check+0x164/0x1b8 fs/dcache.c:1564 Modules linked in: CPU: 0 UID: 0 PID: 6826 Comm: syz.0.40 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : umount_check+0x164/0x1b8 fs/dcache.c:1564 lr : umount_check+0x164/0x1b8 fs/dcache.c:1564 sp : ffff8000a3447570 x29: ffff8000a3447570 x28: 0000000000000000 x27: ffff0000f29011a0 x26: ffff0000f2901d60 x25: ffff80009005a750 x24: ffff0000d47ba000 x23: dfff800000000000 x22: ffff8000905affa0 x21: 0000000000000002 x20: 0000000000001b78 x19: ffff0000f2901d60 x18: 0000000000000008 x17: 0000000000000000 x16: ffff80008b7c542c x15: ffff700011fb7b50 x14: 1ffff00011fb7b50 x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000080000 x10: 000000000007ffff x9 : e768e2eb8b09ad00 x8 : e768e2eb8b09ad00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a3446d18 x4 : ffff80008fe2fb00 x3 : ffff8000804a89e8 x2 : 0000000000000000 x1 : 0000000100000002 x0 : 0000000000000000 Call trace: umount_check+0x164/0x1b8 fs/dcache.c:1564 (P) d_walk+0x1d4/0x704 fs/dcache.c:1295 do_one_tree+0x44/0xfc fs/dcache.c:1579 shrink_dcache_for_umount+0xd8/0x188 fs/dcache.c:1595 generic_shutdown_super+0x68/0x2bc fs/super.c:620 kill_anon_super fs/super.c:1237 [inline] kill_litter_super+0x74/0xb8 fs/super.c:1247 efivarfs_kill_sb+0x50/0x70 fs/efivarfs/super.c:566 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 put_fs_context+0x88/0x768 fs/fs_context.c:516 fscontext_release+0x64/0x84 fs/fsopen.c:73 __fput+0x340/0x760 fs/file_table.c:464 ____fput+0x20/0x30 fs/file_table.c:492 task_work_run+0x230/0x2e0 kernel/task_work.c:227 get_signal+0x1324/0x1500 kernel/signal.c:2809 do_signal+0x22c/0x3a04 arch/arm64/kernel/signal.c:1658 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 irq event stamp: 15788 hardirqs last enabled at (15787): [] __up_console_sem kernel/printk/printk.c:344 [inline] hardirqs last enabled at (15787): [] __console_unlock+0x70/0xc4 kernel/printk/printk.c:2869 hardirqs last disabled at (15788): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (15782): [] softirq_handle_end kernel/softirq.c:407 [inline] softirqs last enabled at (15782): [] handle_softirqs+0xb44/0xd34 kernel/softirq.c:589 softirqs last disabled at (15725): [] __do_softirq+0x14/0x20 kernel/softirq.c:595 ---[ end trace 0000000000000000 ]--- VFS: Busy inodes after unmount of efivarfs (efivarfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:652! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 UID: 0 PID: 6826 Comm: syz.0.40 Tainted: G W 6.14.0-rc7-syzkaller-ga2392f333575 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : generic_shutdown_super+0x2b8/0x2bc fs/super.c:650 lr : generic_shutdown_super+0x2b8/0x2bc fs/super.c:650 sp : ffff8000a34476b0 x29: ffff8000a34476b0 x28: 1fffe0001a6b3b91 x27: 1fffe0001a6b3b8a x26: ffff0000d359dc50 x25: ffff0000c14bf758 x24: 1fffe0001a8f74f0 x23: ffff80008be15a80 x22: dfff800000000000 x21: 0000000000000000 x20: ffff8000905affa0 x19: ffff0000d47ba668 x18: 0000000000000008 x17: 00000000000208d5 x16: ffff80008b7c542c x15: ffff700011fb7b50 x14: 1ffff00011fb7b50 x13: 0000000000000004 x12: ffffffffffffffff x11: 0000000000080000 x10: 000000000007ffff x9 : e768e2eb8b09ad00 x8 : e768e2eb8b09ad00 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff8000a3446e78 x4 : ffff80008fe2fb00 x3 : ffff8000804a89e8 x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000035 Call trace: generic_shutdown_super+0x2b8/0x2bc fs/super.c:650 (P) kill_anon_super fs/super.c:1237 [inline] kill_litter_super+0x74/0xb8 fs/super.c:1247 efivarfs_kill_sb+0x50/0x70 fs/efivarfs/super.c:566 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 put_fs_context+0x88/0x768 fs/fs_context.c:516 fscontext_release+0x64/0x84 fs/fsopen.c:73 __fput+0x340/0x760 fs/file_table.c:464 ____fput+0x20/0x30 fs/file_table.c:492 task_work_run+0x230/0x2e0 kernel/task_work.c:227 get_signal+0x1324/0x1500 kernel/signal.c:2809 do_signal+0x22c/0x3a04 arch/arm64/kernel/signal.c:1658 do_notify_resume+0x74/0x1f4 arch/arm64/kernel/entry-common.c:148 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: b0056760 91228000 aa1303e1 97cfdf8d (d4210000) ---[ end trace 0000000000000000 ]--- pstore: backend (efi_pstore) writing error (-16)