** Changed in: linux-azure (Ubuntu Focal)
Status: In Progress => Fix Committed
** Changed in: linux-azure (Ubuntu Impish)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1970223
Title:
linux-azure: add check to prevent attempting to resize an fs with
sparse_super2
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure source package in Focal:
Fix Committed
Status in linux-azure source package in Impish:
Fix Committed
Bug description:
SRU Justification
[Impact]
Microsoft has detected an Xfstest failure scenario. There might be fs
corruption when resizing ext4 filesystems mounted with sparse_super2
option enabled.
Fix: commit b1489186cc8391e0c1e342f9fbc3eedf6b944c61 ("ext4: add check
to prevent attempting to resize an fs with sparse_super2")
[Test Case]
mkfs.ext4 -b 4096 -I 256 -J size=32 -E resize=$((256*1024*1024)) -O
sparse_super2 ext4.img 65M truncate -s 30G ext4.img
mount ext4.img /mnt
python3 -c 'import fcntl, os, struct ; fd = os.open("/mnt", os.O_RDONLY |
os.O_DIRECTORY) ; fcntl.ioctl(fd, 0x40086610, struct.pack("Q", 30 * 1024 * 1024
* 1024 // 4096), False) ; os.close(fd)'
dmesg | tail
e2fsck ext4.img
[Where things could go wrong]
The file system may erroneously not mount.
[Other Info]
SF: #00334996
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