Public bug reported:
When performing large file operations (e.g., copying a large directory)
from a system drive encrypted with LUKS/LVM to a VeraCrypt volume
formatted with exFAT, the system experiences a kernel deadlock. This
leads to a complete system freeze, sometimes followed by a USB bus
disconnect, requiring a hard reboot. The issue is reproducible on my
system across three separate external VeraCrypt drives.
Steps to reproduce:
1. Install Linux Mint with the default LUKS full-disk encryption option (which
creates a LUKS container with LVM).
2. Create a VeraCrypt volume on an external USB SSD/drive. Format the
filesystem inside the VeraCrypt volume as exFAT.
3. Mount the VeraCrypt volume.
4. Attempt to copy a large directory (many gigabytes with thousands of files)
from the the user's home directory on the LUKS-encrypted system drive to exFAT
VeraCrypt volume.
5. Observe the system. The file copy will hang, the system will become
unresponsive, and a kernel deadlock will occur.
System info and journalct logs identifying issue are attached
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "log.txt"
https://bugs.launchpad.net/bugs/2115080/+attachment/5885113/+files/log.txt
** Description changed:
When performing large file operations (e.g., copying a large directory)
from a system drive encrypted with LUKS/LVM to a VeraCrypt volume
formatted with exFAT, the system experiences a kernel deadlock. This
leads to a complete system freeze, sometimes followed by a USB bus
- disconnect, requiring a hard reboot. The issue is 100% reproducible.
+ disconnect, requiring a hard reboot. The issue is reproducible on my
+ system across three separate external VeraCrypt drives.
Steps to reproduce:
1. Install Linux Mint with the default LUKS full-disk encryption option
(which creates a LUKS container with LVM).
2. Create a VeraCrypt volume on an external USB SSD/drive. Format the
filesystem inside the VeraCrypt volume as exFAT.
3. Mount the VeraCrypt volume.
4. Attempt to copy a large directory (many gigabytes with thousands of files)
from the the user's home directory on the LUKS-encrypted system drive to exFAT
VeraCrypt volume.
5. Observe the system. The file copy will hang, the system will become
unresponsive, and a kernel deadlock will occur.
System info and journalct logs identifying issue are attached
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2115080
Title:
Kernel deadlock in exfat driver during I/O on a VeraCrypt volume over
LUKS
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2115080/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
