Hey,
On 2023-11-05 04:12, Hervé Werner wrote:
> I faced this issue on real data but I struggled to find a reliable scenario
> to reproduce it. Here is what I just came up with:
> sudo mkfs -t ext4 -O fast_commit,inline_data /dev/sdb
> sudo mount /dev/sdb /mnt/
> sudo install -d -o myuser /mnt/annex
> cd /mnt/annex
> git init && git annex init
> for i in {1..2}; do
> for i in {1..10000}; do
> dd if=/dev/urandom of=file-${i} bs=1K count=1 2>/dev/null
> done
> git annex add -J cpus . >/dev/null && git annex sync -J cpus && git annex
> fsck -J cpus >/dev/null
> git rm * && git annex sync && git annex dropunused all
> done
>
> Then at some point the following error appears:
> EXT4-fs error (device sdb): ext4_map_blocks:577: inode #3942343: block 4:
> comm git-annex:w: lblock 1 mapped to illegal pblock 4 (length 1)
Just a quick note to confirm that I can reliably reproduce the issue
using a USB stick and the above script on Bookworm. After running the
reproducer for a few minutes I start getting the following in dmesg:
kernel: EXT4-fs error (device sdf): ext4_map_blocks:607: inode #9971675: block
4: comm git-annex:w: lblock 1 mapped to illegal pblock 4 (length 1)
uname -a is:
Linux ariel 6.1.0-21-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.90-1 (2024-05-03)
x86_64 GNU/Linux
