New: jbd2: potential data lost in recovering journal raced with synchronizing fs bdev

https://bugzilla.kernel.org/show_bug.cgi?id=217888

Bug ID: 217888
Summary: jbd2: potential data lost in recovering journal raced
with synchronizing fs bdev
Product: File System
Version: 2.5
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P3
Component: ext4
Assignee: [email protected]
Reporter: [email protected]
Regression: No

1. Apply diff and compile kernel
2. dd if=disk_1 of=/dev/sda bs=1M
dd if=disk_1 of=/dev/sda bs=1M seek=43
3. mount /dev/sda temp # will stuck
4. sync /dev/sda # Type this command in another terminal, finish it in 5s when you see "wait sync" from dmesg.
4. umount temp
5. fsck.ext4 -fn /dev/sda

Unattached inode 13
Connect to /lost+found? no

Pass 5: Checking group summary information

/dev/sda: ********** WARNING: Filesystem still has errors **********

===============
'touch file' is recorded in journal of sda, and the journal is not replayed yet.

journal in sda:

Journal starts at block 1, transaction 2
Found expected sequence 2, type 1 (descriptor block) at block 1 Dumping descriptor block, sequence 2, at block 1:
FS block 266 logged at journal block 2 (flags 0x0)
FS block 2 logged at journal block 3 (flags 0x2)
FS block 276 logged at journal block 4 (flags 0x2) # new inode
FS block 273 logged at journal block 5 (flags 0x2)
FS block 3479 logged at journal block 6 (flags 0x2) # new dentry FS block 1 logged at journal block 7 (flags 0xa)
Found expected sequence 2, type 2 (commit block) at block 8

You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.kernel.org/show_bug.cgi?id=217888

--- Comment #1 from Zhihao Cheng ([email protected]) --- Created attachment 305067
--> https://bugzilla.kernel.org/attachment.cgi?id=305067&action=edit
diff

You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.kernel.org/show_bug.cgi?id=217888

--- Comment #2 from Zhihao Cheng ([email protected]) ---
1. Apply diff_v2 and compile kernel
2. dd if=disk of=/dev/sda bs=1M
3. mount /dev/sda temp # will stuck
4. sync /dev/sda # Type this command in another terminal, finish it in 5s when you see "wait sync" from dmesg.
4. umount temp
5. fsck.ext4 -fa /dev/sda
/dev/sda: Unattached inode 13

/dev/sda: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(i.e., without -a or -p options)

===============
'touch file' is recorded in journal of sda, and the journal is not replayed yet.

journal in sda:

Journal starts at block 1, transaction 2
Found expected sequence 2, type 1 (descriptor block) at block 1 Dumping descriptor block, sequence 2, at block 1:
FS block 84 logged at journal block 2 (flags 0x0)
FS block 2 logged at journal block 3 (flags 0x2)
FS block 89 logged at journal block 4 (flags 0x2) # new inode FS block 86 logged at journal block 5 (flags 0x2)
FS block 726 logged at journal block 6 (flags 0x2) # new dentry FS block 1 logged at journal block 7 (flags 0x2)
FS block 83 logged at journal block 8 (flags 0xa)

You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.kernel.org/show_bug.cgi?id=217888

--- Comment #3 from Zhihao Cheng ([email protected]) --- Created attachment 305068
--> https://bugzilla.kernel.org/attachment.cgi?id=305068&action=edit
diff_v2

You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.kernel.org/show_bug.cgi?id=217888

--- Comment #4 from Zhihao Cheng ([email protected]) --- Created attachment 305069
--> https://bugzilla.kernel.org/attachment.cgi?id=305069&action=edit
disk

You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.