syzbot


BUG: Dentry still in use [unmount of ext4 loop5]

Status: auto-closed as invalid on 2022/01/24 11:15
Reported-by: syzbot+fcdb999cdb3a3b94b195@syzkaller.appspotmail.com
First crash: 1211d, last: 930d

Sample crash report:
BUG: Dentry ffff8881ec906330{i=0,n=.index}  still in use (2) [unmount of ext4 loop5]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3744 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 3744 Comm: syz-executor.5 Not tainted 5.4.125-syzkaller-00011-gd52ac987ad2a #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 a0 0a e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881afc9fc58 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: e883e5b2d220bc00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881ea915420 R08: ffffffff814e90d7 R09: ffffed103ede9608
R10: ffffed103ede9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000002 R14: 0000000000000000 R15: ffff8881ec906330
FS:  0000555555fba400(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f17f3f3abe1 CR3: 00000001afd19000 CR4: 00000000001426e0
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: 0033:0x7faf484bbb67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde70d10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faf484bbb67
RDX: 00007ffde70d11bb RSI: 0000000000000002 RDI: 00007ffde70d11b0
RBP: 00007ffde70d11b0 R08: 00000000ffffffff R09: 00007ffde70d0f80
R10: 0000555555fbbbd3 R11: 0000000000000246 R12: 00007faf48513e80
R13: 00007ffde70d2270 R14: 0000555555fbbb00 R15: 00007ffde70d22b0
---[ end trace 2237aab484b301aa ]---
VFS: Busy inodes after unmount of loop5. Self-destruct in 5 seconds.  Have a nice day...
BUG: Dentry ffff8881ecb58ee0{i=0,n=.index}  still in use (1) [unmount of ext4 loop5]
------------[ cut here ]------------
WARNING: CPU: 1 PID: 3744 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 1 PID: 3744 Comm: syz-executor.5 Tainted: G        W         5.4.125-syzkaller-00011-gd52ac987ad2a #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 a0 0a e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881afc9fc58 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: e883e5b2d220bc00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881e1dfa420 R08: ffffffff814e90d7 R09: ffffed103ede9608
R10: ffffed103ede9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ecb58ee0
FS:  0000555555fba400(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555fc3b38 CR3: 00000001afd19000 CR4: 00000000001426e0
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: 0033:0x7faf484bbb67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde70d10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faf484bbb67
RDX: 00007ffde70d11bb RSI: 0000000000000002 RDI: 00007ffde70d11b0
RBP: 00007ffde70d11b0 R08: 00000000ffffffff R09: 00007ffde70d0f80
R10: 0000555555fbbbd3 R11: 0000000000000246 R12: 00007faf48513e80
R13: 00007ffde70d2270 R14: 0000555555fbbb00 R15: 00007ffde70d22b0
---[ end trace 2237aab484b301ab ]---
VFS: Busy inodes after unmount of loop5. Self-destruct in 5 seconds.  Have a nice day...
BUG: Dentry ffff8881e5eee880{i=0,n=.index}  still in use (1) [unmount of ext4 loop5]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3744 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 3744 Comm: syz-executor.5 Tainted: G        W         5.4.125-syzkaller-00011-gd52ac987ad2a #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 a0 0a e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881afc9fc58 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: e883e5b2d220bc00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881ebb69420 R08: ffffffff814e90d7 R09: ffffed103edc9608
R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881e5eee880
FS:  0000555555fba400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555fc3b38 CR3: 00000001afd19000 CR4: 00000000001426f0
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: 0033:0x7faf484bbb67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde70d10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faf484bbb67
RDX: 00007ffde70d11bb RSI: 0000000000000002 RDI: 00007ffde70d11b0
RBP: 00007ffde70d11b0 R08: 00000000ffffffff R09: 00007ffde70d0f80
R10: 0000555555fbbbd3 R11: 0000000000000246 R12: 00007faf48513e80
R13: 00007ffde70d2270 R14: 0000555555fbbb00 R15: 00007ffde70d22b0
---[ end trace 2237aab484b301ac ]---
VFS: Busy inodes after unmount of loop5. Self-destruct in 5 seconds.  Have a nice day...
BUG: Dentry ffff8881ecb9dee0{i=0,n=.index}  still in use (1) [unmount of ext4 loop5]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3744 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 3744 Comm: syz-executor.5 Tainted: G        W         5.4.125-syzkaller-00011-gd52ac987ad2a #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 a0 0a e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881afc9fc58 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: e883e5b2d220bc00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881e1f7f420 R08: ffffffff814e90d7 R09: ffffed103edc9608
R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881ecb9dee0
FS:  0000555555fba400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555fc3b38 CR3: 00000001afd19000 CR4: 00000000001426f0
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: 0033:0x7faf484bbb67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde70d10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faf484bbb67
RDX: 00007ffde70d11bb RSI: 0000000000000002 RDI: 00007ffde70d11b0
RBP: 00007ffde70d11b0 R08: 00000000ffffffff R09: 00007ffde70d0f80
R10: 0000555555fbbbd3 R11: 0000000000000246 R12: 00007faf48513e80
R13: 00007ffde70d2270 R14: 0000555555fbbb00 R15: 00007ffde70d22b0
---[ end trace 2237aab484b301ad ]---
VFS: Busy inodes after unmount of loop5. Self-destruct in 5 seconds.  Have a nice day...
BUG: Dentry ffff8881eca40aa0{i=0,n=.index}  still in use (1) [unmount of ext4 loop5]
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3744 at fs/dcache.c:1597 umount_check+0x179/0x1c0 fs/dcache.c:1588
Modules linked in:
CPU: 0 PID: 3744 Comm: syz-executor.5 Tainted: G        W         5.4.125-syzkaller-00011-gd52ac987ad2a #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 a0 0a e9 84 4c 89 fe 4c 89 f2 4c 89 f9 45 89 e8 31 c0 55 e8 37 a2 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:ffff8881afc9fc58 EFLAGS: 00010282
RAX: 0000000000000054 RBX: ffffffff85faa1c0 RCX: e883e5b2d220bc00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffff8881f35ff420 R08: ffffffff814e90d7 R09: ffffed103edc9608
R10: ffffed103edc9608 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8881eca40aa0
FS:  0000555555fba400(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555fc3b38 CR3: 00000001afd19000 CR4: 00000000001426f0
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: 0033:0x7faf484bbb67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffde70d10e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007faf484bbb67
RDX: 00007ffde70d11bb RSI: 0000000000000002 RDI: 00007ffde70d11b0
RBP: 00007ffde70d11b0 R08: 00000000ffffffff R09: 00007ffde70d0f80
R10: 0000555555fbbbd3 R11: 0000000000000246 R12: 00007faf48513e80
R13: 00007ffde70d2270 R14: 0000555555fbbb00 R15: 00007ffde70d22b0
---[ end trace 2237aab484b301ae ]---
VFS: Busy inodes after unmount of loop5. Self-destruct in 5 seconds.  Have a nice day...

Crashes (14):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/09/26 11:14 android12-5.4 d52ac987ad2a 8cac236e .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/09/22 09:14 android12-5.4 546305780d82 169724fe .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/09/13 05:47 android12-5.4 8670e680e307 3ce60af8 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/09/08 02:02 android12-5.4 8670e680e307 064c9eb7 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/07/22 01:24 android12-5.4 fe8243e7f1d1 29c3f20f .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/06/11 15:13 android12-5.4 e5f6b8e5e384 1ba81399 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/06/03 06:38 android12-5.4 114add618c71 0740de69 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/05/30 02:10 android12-5.4 3e256ddba1ff 325a8dab .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/04/14 17:06 android12-5.4 ce6a5172613f 3134b37f .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/03/07 11:28 android12-5.4 1bd00b1a96b5 c599ed12 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/03/05 04:00 android12-5.4 7b836d210b94 f89ed068 .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2021/02/23 12:57 android12-5.4 1e6b091b33fc fcc6d71b .config console log report info ci2-android-5-4-kasan BUG: Dentry still in use [unmount of ext4 loop5]
2020/12/22 03:16 android12-5.4 4aa7a7c97391 04201c06 .config console log report info ci2-android-5-4-kasan
2020/12/18 13:54 android12-5.4 cd5f5cb9fe67 04201c06 .config console log report info ci2-android-5-4-kasan
* Struck through repros no longer work on HEAD.