BUG: Dentry 000000005cd87dc8{i=0,n=.reiserfs_priv} still in use (1) [unmount of squashfs loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6330 at fs/dcache.c:1676 umount_check+0x180/0x1bc fs/dcache.c:1667 Modules linked in: CPU: 0 PID: 6330 Comm: syz-executor.0 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : umount_check+0x180/0x1bc fs/dcache.c:1667 lr : umount_check+0x180/0x1bc fs/dcache.c:1667 sp : ffff800097007720 x29: ffff800097007720 x28: ffff0000e9b98e50 x27: ffff0000e9b98e50 x26: ffff0000e9b98d38 x25: ffff0000e9b98e50 x24: ffff0000d1148000 x23: dfff800000000000 x22: ffff80008e25b3e0 x21: 0000000000000001 x20: 0000000000000000 x19: ffff0001ffb36ec8 x18: ffff800097006d60 x17: 657375206e69206c x16: ffff80008a443320 x15: 0000000000000003 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000002 x10: 0000000000000000 x9 : 6bcef0521c245700 x8 : 6bcef0521c245700 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800097007038 x4 : ffff80008df9ee80 x3 : ffff800082a94064 x2 : 0000000000000001 x1 : 0000000100000002 x0 : 0000000000000060 Call trace: umount_check+0x180/0x1bc fs/dcache.c:1667 d_walk+0x1b4/0x64c fs/dcache.c:1386 do_one_tree+0x44/0xfc fs/dcache.c:1683 shrink_dcache_for_umount+0x80/0x12c fs/dcache.c:1699 generic_shutdown_super+0x68/0x328 fs/super.c:472 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 23869674 hardirqs last enabled at (23869673): [] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:347 hardirqs last disabled at (23869674): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:407 softirqs last enabled at (23869092): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (23869090): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BUG: Dentry 000000005cd87dc8{i=0,n=.reiserfs_priv} still in use (1) [unmount of squashfs loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6330 at fs/dcache.c:1676 umount_check+0x180/0x1bc fs/dcache.c:1667 Modules linked in: CPU: 0 PID: 6330 Comm: syz-executor.0 Tainted: G W 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : umount_check+0x180/0x1bc fs/dcache.c:1667 lr : umount_check+0x180/0x1bc fs/dcache.c:1667 sp : ffff800097007720 x29: ffff800097007720 x28: ffff0000e9b98e50 x27: ffff0000e9b98e50 x26: ffff0000e9b98d38 x25: ffff0000e9b98e50 x24: ffff0000d1148000 x23: dfff800000000000 x22: ffff80008e25b3e0 x21: 0000000000000001 x20: 0000000000000000 x19: ffff0001ffb36ec8 x18: ffff800097006d60 x17: 657375206e69206c x16: ffff80008a443320 x15: 0000000000000004 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000003 x10: 0000000000000000 x9 : 6bcef0521c245700 x8 : 6bcef0521c245700 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800097007038 x4 : ffff80008df9ee80 x3 : ffff800082a94064 x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000060 Call trace: umount_check+0x180/0x1bc fs/dcache.c:1667 d_walk+0x1b4/0x64c fs/dcache.c:1386 do_one_tree+0x44/0xfc fs/dcache.c:1683 shrink_dcache_for_umount+0x80/0x12c fs/dcache.c:1699 generic_shutdown_super+0x68/0x328 fs/super.c:472 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 irq event stamp: 23869720 hardirqs last enabled at (23869719): [] __up_console_sem+0x60/0xb4 kernel/printk/printk.c:347 hardirqs last disabled at (23869720): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:407 softirqs last enabled at (23869698): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (23869698): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:600 softirqs last disabled at (23869679): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 ---[ end trace 0000000000000000 ]--- VFS: Busy inodes after unmount of loop0 (squashfs) ------------[ cut here ]------------ kernel BUG at fs/super.c:504! Internal error: Oops - BUG: 00000000f2000800 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6330 Comm: syz-executor.0 Tainted: G W 6.4.0-rc7-syzkaller-ge40939bbfc68 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : generic_shutdown_super+0x324/0x328 fs/super.c:502 lr : generic_shutdown_super+0x324/0x328 fs/super.c:502 sp : ffff800097007870 x29: ffff800097007870 x28: 1fffe0001b39aada x27: 0000000000000008 x26: 0000000000000003 x25: dfff800000000000 x24: 1fffe0001a2290fb x23: dfff800000000000 x22: ffff80008a6d9340 x21: 0000000000000000 x20: ffff80008e25b3e0 x19: ffff0000d11486a8 x18: ffff800097007080 x17: ffff80008debd000 x16: ffff80008a443320 x15: 0000000000000001 x14: 0000000000000000 x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 6bcef0521c245700 x8 : 6bcef0521c245700 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800097007178 x4 : ffff80008df9ee80 x3 : ffff800082a94064 x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000032 Call trace: generic_shutdown_super+0x324/0x328 fs/super.c:502 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: f004df40 91338000 aa1303e1 95d276c2 (d4210000) ---[ end trace 0000000000000000 ]---