BUG: Dentry ffff8881ecf6f660{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 0 PID: 334 Comm: syz-executor513 Not tainted 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881f0ab4420 R08: ffffffff814e8437 R09: ffffed103edc5e08 R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ecf6f660 FS: 0000000001fe9300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000005e60 RCX: 0000000000446247 RDX: 00007ffcb80cdf39 RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 0000000000000004 ---[ end trace 9cc7b261bbd264de ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... WARNING: CPU: 0 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 CPU: 0 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881f0ab7420 R08: ffffffff814e8437 R09: ffffed103edc5e08 R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e6066110 FS: 0000000001fe9300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 generic_shutdown_super+0x63/0x2a0 fs/super.c:447 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 deactivate_super+0x1b3/0x270 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000631a RCX: 0000000000446247 RDX: 00007ffcb80cdf39 RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 0000000000000006 ---[ end trace 9cc7b261bbd264df ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... WARNING: CPU: 0 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 CPU: 0 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881ee4ef420 R08: ffffffff814e8437 R09: ffffed103edc5e08 R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e608b000 FS: 0000000001fe9300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 generic_shutdown_super+0x63/0x2a0 fs/super.c:447 deactivate_locked_super+0xaf/0x100 fs/super.c:335 deactivate_super+0x1b3/0x270 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 00000000000067de RCX: 0000000000446247 RDX: 00007ffcb80cdf39 RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 0000000000000008 ---[ end trace 9cc7b261bbd264e0 ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... WARNING: CPU: 0 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 CPU: 0 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881eed42420 R08: ffffffff814e8437 R09: ffffed103edc5e08 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ecf7dbb0 FS: 0000000001fe9300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 generic_shutdown_super+0x63/0x2a0 fs/super.c:447 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 deactivate_super+0x1b3/0x270 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000006af4 RCX: 0000000000446247 RDX: 00007ffcb80cdf39 RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 0000000000000009 ---[ end trace 9cc7b261bbd264e1 ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... WARNING: CPU: 1 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 1 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881ee7a3420 R08: ffffffff814e8437 R09: ffffed103ede5e08 R10: ffffed103ede5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e60f8110 FS: 0000000001fe9300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 generic_shutdown_super+0x63/0x2a0 fs/super.c:447 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 deactivate_super+0x1b3/0x270 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000712a RCX: 0000000000446247 RDX: 00007ffcb80cdf3a RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 000000000000000c ---[ end trace 9cc7b261bbd264e2 ]--- BUG: Dentry ffff8881e607e770{i=0,n=.index} still in use (1) [unmount of vfat loop0] ------------[ cut here ]------------ WARNING: CPU: 0 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 0 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881ec633420 R08: ffffffff814e8437 R09: ffffed103edc5e08 R10: ffffed103edc5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e607e770 FS: 0000000001fe9300(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000007443 RCX: 0000000000446247 RDX: 00007ffcb80cdf3a RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 000000000000000d ---[ end trace 9cc7b261bbd264e3 ]--- VFS: Busy inodes after unmount of loop0. Self-destruct in 5 seconds. Have a nice day... WARNING: CPU: 1 PID: 334 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588 Modules linked in: CPU: 1 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RSP: 0018:ffff8881e5c0fc58 EFLAGS: 00010282 RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffff8881dffb0420 R08: ffffffff814e8437 R09: ffffed103ede5e08 R10: ffffed103ede5e08 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e614cee0 FS: 0000000001fe9300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001ff2628 CR3: 00000001ee133000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: d_walk+0x2d9/0x540 fs/dcache.c:1307 do_one_tree fs/dcache.c:1604 [inline] shrink_dcache_for_umount+0x8a/0x1a0 fs/dcache.c:1620 generic_shutdown_super+0x63/0x2a0 fs/super.c:447 kill_block_super+0x79/0xd0 fs/super.c:1444 deactivate_locked_super+0xaf/0x100 fs/super.c:335 deactivate_super+0x1b3/0x270 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1102 task_work_run+0x186/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:163 [inline] prepare_exit_to_usermode+0x2b0/0x310 arch/x86/entry/common.c:194 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x446247 Code: 06 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:00007ffcb80cde78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 000000000000820a RCX: 0000000000446247 RDX: 00007ffcb80cdf3a RSI: 0000000000000002 RDI: 00007ffcb80cdf30 RBP: 00007ffcb80cdf30 R08: 00000000ffffffff R09: 00007ffcb80cdd10 R10: 0000000001fea663 R11: 0000000000000206 R12: 00007ffcb80cefb0 R13: 0000000001fea5f0 R14: 00007ffcb80cdea0 R15: 0000000000000014 ---[ end trace 9cc7b261bbd264e4 ]--- Modules linked in: CPU: 0 PID: 334 Comm: syz-executor513 Tainted: G W 5.4.123-syzkaller-00835-g3e256ddba1ff #0 RIP: 0010:umount_check+0x179/0x1c0 fs/dcache.c:1588 Code: ff 4c 8b 0b 48 81 c5 20 04 00 00 48 c7 c7 20 02 e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 67 a6 af ff 48 83 c4 08 <0f> 0b e9 fd fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c d4 fe ff RAX: 0000000000000054 RBX: ffffffff85fc59e0 RCX: b643227c30d1bc00