kpatch-build: fix Fedora 42+ kernel source directory nesting

Starting with Fedora 42, the kernel SRPM unpacks with an extra level
of nesting:

  BUILD/kernel-6.14.0-build/kernel-6.14/linux-6.14.0-63.fc42.x86_64/

The existing glob BUILD/kernel-*/linux-* only matches one level deep
and fails with "cannot stat" on this layout.

Try the traditional flat glob first for backward compatibility. If it
fails, fall back to a recursive find (up to 4 levels) to locate the
linux-* source directory regardless of nesting depth.

Tested on Fedora 42 with kernel 6.14.0-63.fc42.x86_64.

Signed-off-by: Or Shoval <oshoval@redhat.com>
Co-authored-by: Cursor <cursoragent@cursor.com>

Author: oshoval

kpatch-build/kpatch-build

@@ -1082,7 +1082,15 @@ else
 		elif [[ "$DISTRO" = photon ]]; then
 			mv "$RPMTOPDIR"/BUILD/linux-"$KVER" "$KERNEL_SRCDIR" 2>&1 | logger || die
 		else
-			mv "$RPMTOPDIR"/BUILD/kernel-*/linux-* "$KERNEL_SRCDIR" 2>&1 | logger || die
+			# Fedora 42+ nests the source deeper:
+			#   BUILD/kernel-X.Y.Z-build/kernel-X.Y/linux-X.Y.Z-NN.fcNN.ARCH/
+			# Try the traditional flat glob first, fall back to a recursive find.
+			if ! mv "$RPMTOPDIR"/BUILD/kernel-*/linux-* "$KERNEL_SRCDIR" 2>/dev/null; then
+				LINUX_SRC=$(find "$RPMTOPDIR/BUILD" -maxdepth 4 -type d -name "linux-*" \
+					! -path "*/configs/*" | head -1)
+				[[ -n "$LINUX_SRC" ]] || die "Could not find linux source directory under $RPMTOPDIR/BUILD"
+				mv "$LINUX_SRC" "$KERNEL_SRCDIR" 2>&1 | logger || die
+			fi
 		fi
 
 		rm -rf "$RPMTOPDIR"