gfs2: fsid=syz:syz.0: first mount done, others may mount BUG: Dentry 000000009b9afd73{i=925,n=/} still in use (5) [unmount of gfs2 loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5183 at fs/dcache.c:1681 umount_check+0x180/0x1bc fs/dcache.c:1672 Modules linked in: CPU: 0 PID: 5183 Comm: syz.0.16 Not tainted 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : umount_check+0x180/0x1bc fs/dcache.c:1672 lr : umount_check+0x180/0x1bc fs/dcache.c:1672 sp : ffff800021727760 x29: ffff800021727760 x28: ffff7000042e4f48 x27: ffff0000e1febd60 x26: ffff800021727a40 x25: dfff800000000000 x24: ffff0000cda4c000 x23: dfff800000000000 x22: ffff8000161c2440 x21: 0000000000000005 x20: 0000000000000925 x19: ffff0000e1febd60 x18: ffff800021726cc0 x17: 756f6d6e755b2029 x16: ffff80001232d384 x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ed84d72ce2638900 x8 : ed84d72ce2638900 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800021727078 x4 : ffff800015b731c0 x3 : ffff80000ab3646c x2 : ffff0001b3cdfcd0 x1 : 0000000000000001 x0 : 0000000000000051 Call trace: umount_check+0x180/0x1bc fs/dcache.c:1672 d_walk+0x6c/0x660 fs/dcache.c:1367 do_one_tree+0x44/0xfc fs/dcache.c:1688 shrink_dcache_for_umount+0x80/0x12c fs/dcache.c:1704 generic_shutdown_super+0x68/0x328 fs/super.c:473 kill_block_super+0x70/0xdc fs/super.c:1470 gfs2_kill_sb+0xc0/0xd4 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 gfs2_thaw_super+0x18c/0x25c fs/gfs2/super.c:828 do_vfs_ioctl+0x1024/0x26f8 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 96800 hardirqs last enabled at (96799): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (96800): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (96758): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (96756): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- BUG: Dentry 000000009b9afd73{i=925,n=/} still in use (5) [unmount of gfs2 loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 5183 at fs/dcache.c:1681 umount_check+0x180/0x1bc fs/dcache.c:1672 Modules linked in: CPU: 0 PID: 5183 Comm: syz.0.16 Tainted: G W 6.1.123-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : umount_check+0x180/0x1bc fs/dcache.c:1672 lr : umount_check+0x180/0x1bc fs/dcache.c:1672 sp : ffff800021727760 x29: ffff800021727760 x28: ffff0000e1febe78 x27: ffff0000e1febd60 x26: ffff0000e1febd60 x25: dfff800000000000 x24: ffff0000cda4c000 x23: dfff800000000000 x22: ffff8000161c2440 x21: 0000000000000005 x20: 0000000000000925 x19: ffff0000e1febd60 x18: ffff800021726cc0 x17: 756f6d6e755b2029 x16: ffff80001227ac80 x15: 0000000000000000 x14: 00000000ffffffff x13: 0000000000000001 x12: 0000000000000001 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ed84d72ce2638900 x8 : ed84d72ce2638900 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800021727078 x4 : ffff800015b731c0 x3 : ffff800008349ebc x2 : 0000000000000001 x1 : 0000000000000002 x0 : 0000000000000051 Call trace: umount_check+0x180/0x1bc fs/dcache.c:1672 d_walk+0x6c/0x660 fs/dcache.c:1367 do_one_tree+0x44/0xfc fs/dcache.c:1688 shrink_dcache_for_umount+0x80/0x12c fs/dcache.c:1704 generic_shutdown_super+0x68/0x328 fs/super.c:473 kill_block_super+0x70/0xdc fs/super.c:1470 gfs2_kill_sb+0xc0/0xd4 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 gfs2_thaw_super+0x18c/0x25c fs/gfs2/super.c:828 do_vfs_ioctl+0x1024/0x26f8 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 irq event stamp: 96884 hardirqs last enabled at (96883): [] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:261 hardirqs last disabled at (96884): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405 softirqs last enabled at (96866): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (96866): [] handle_softirqs+0xb84/0xd58 kernel/softirq.c:599 softirqs last disabled at (96803): [] __do_softirq+0x14/0x20 kernel/softirq.c:605 ---[ end trace 0000000000000000 ]---