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Merge regression tests: make loop device size more generous

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Depending on the system, copying echo to the loop device fails because the echo binary is too large.
Especially on systems that have echo be just a symlink to coreutils (e.g. busybox) (as opposed to echo being its own binary) 16k is just not enough.
2M seems fine on my system, but this might need yet a higher value depending on what coreutils other people actually run.

The crash in question:
```
cp: error writing '/tmp/sdtest.3937422-31490-Bxvi6g/mount_target/echo': No space left on device
Fatal Error (file_unbindable_mount): Unexpected shell error. Run with -x to debug
rm: cannot remove '/tmp/sdtest.3937422-31490-Bxvi6g/mount_target': Device or resource busy
```

MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/1469
Approved-by: John Johansen <john@jjmx.net>
Merged-by: John Johansen <john@jjmx.net>
This commit is contained in:
John Johansen 2024-12-20 08:53:41 +00:00
commit 8e431ebcd9
1 changed files with 2 additions and 2 deletions
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4
tests/regression/apparmor/file_unbindable_mount.sh
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@ -22,14 +22,14 @@ backing_file="$tmpdir/loop_file"
mount_target="$tmpdir/mount_target"
mkdir "${mount_target}"
fallocate -l 512K "${backing_file}"
fallocate -l 4M "${backing_file}"
mkfs.fat -F 32 "${backing_file}" > /dev/null 2> /dev/null
losetup -f "${backing_file}" || fatalerror 'Unable to set up a loop device'
loop_device="$(/sbin/losetup -n -O NAME -l -j "${backing_file}")"
mount --make-unbindable "${loop_device}" "${mount_target}"
fallocate -l 16K "${mount_target}/a_file"
fallocate -l 2M "${mount_target}/a_file"
# echo is also a builtin, making things a bit more complicated
cp "$(type -P echo)" "${mount_target}/echo"