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scripts: Validate kernel downloads

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Download kernel archives through a temporary file, validate XZ data,
and only publish complete files. Reject corrupt cached downloads and
propagate XZ pipeline failures during extraction and patching.

Wire the regression runner cache option to the kernel_downloads
variable used by the shared download helpers.
This commit is contained in:
Gleb Chesnokov
2026-08-21 19:58:59 +03:00
parent 82b5d44a0e
commit 3056c73db8
2 changed files with 50 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
scripts/kernel-functions
+47 -11
View File
@@ -39,16 +39,46 @@ function check_kernel_version {
fi
}
# Download the file from URL $1 and save it in the current directory.
# Verify that a downloaded file is nonempty and, based on $2 or its own name,
# that XZ data is intact.
function download_is_readable {
local filename="${2:-$1}"
[ -s "$1" ] || return 1
case "$filename" in
*.xz) xz -t "$1" >/dev/null 2>&1;;
esac
}
# Download the file from URL $1 and save it atomically in the current
# directory.
function download_file {
if [ ! -e "$(basename "$1")" ]; then
if [ "${quiet_download}" = "false" ]; then
{ wget -q -nc -O- "$1" 2>/dev/null | grep -q .; } \
&& echo "Downloading $1 ..."
local filename tmpfile
filename="$(basename "$1")"
if [ -e "$filename" ]; then
if download_is_readable "$filename"; then
return 0
fi
wget -q -nc "$1"
echo "Removing invalid cached download $filename." >&2
rm -f "$filename" || return $?
fi
if [ "${quiet_download}" = "false" ]; then
echo "Downloading $1 ..."
fi
tmpfile="$(mktemp "${filename}.tmp.XXXXXX")" || return $?
if ! wget -q -O "$tmpfile" "$1" ||
! download_is_readable "$tmpfile" "$filename"; then
echo "Error: download $1 is incomplete or invalid." >&2
rm -f "$tmpfile"
return 1
fi
if ! mv "$tmpfile" "$filename"; then
rm -f "$tmpfile"
return 1
fi
[ -e "$(basename "$1")" ]
}
# Make sure the kernel tarball and patch file are present in directory
@@ -83,9 +113,13 @@ function extract_kernel_archive {
local series="$1"
if [ -e "${kernel_downloads}/linux-$1.tar.xz" ]; then
xz -cd "${kernel_downloads}/linux-$1.tar.xz" | tar xf -
( set -o pipefail
xz -cd "${kernel_downloads}/linux-$1.tar.xz" | tar xf -
)
elif [ -e "${kernel_downloads}/linux-$kver.tar.xz" ]; then
xz -cd "${kernel_downloads}/linux-$kver.tar.xz" | tar xf - &&
( set -o pipefail
xz -cd "${kernel_downloads}/linux-$kver.tar.xz" | tar xf -
) &&
mv "linux-$kver" "linux-$1"
elif [ -e "${kernel_downloads}/linux-$1.tar.bz2" ]; then
tar xjf "${kernel_downloads}/linux-$1.tar.bz2"
@@ -112,8 +146,10 @@ function extract_kernel_tree {
[ -e "${kernel_downloads}/patch-$1.xz" ]; then
extract_kernel_archive "$kver" || return $?
mv "linux-$kver" "linux-$1"
( cd "linux-$1" && xz -cd "${kernel_downloads}/patch-$1.xz" \
| patch -p1 -f -s; ) \
( set -o pipefail
cd "linux-$1" && xz -cd "${kernel_downloads}/patch-$1.xz" \
| patch -p1 -f -s
) \
|| return $?
else
extract_kernel_archive "$1" ||