Commit 8a32d46b authored by James Bottomley's avatar James Bottomley Committed by Ard Biesheuvel
Browse files

selftests/efivarfs: add check for disallowing file truncation 



Now that the ability of arbitrary writes to set the inode size is
fixed, verify that a variable file accepts a truncation operation but
does not change the stat size because of it.

Signed-off-by: default avatarJames Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent 8b4bc207

tools/testing/selftests/efivarfs/efivarfs.sh

+23 −0
Original line number Diff line number Diff line
@@ -202,6 +202,28 @@ test_invalid_filenames() 
	exit $ret

}



test_no_set_size()

{

	local attrs='\x07\x00\x00\x00'

	local file=$efivarfs_mount/$FUNCNAME-$test_guid

	local ret=0



	printf "$attrs\x00" > $file

	[ -e $file -a -s $file ] || exit 1

	chattr -i $file

	: > $file

	if [ $? != 0 ]; then

		echo "variable file failed to accept truncation"

		ret=1

	elif [ -e $file -a ! -s $file ]; then

		echo "file can be truncated to zero size"

		ret=1

	fi

	rm $file || exit 1



	exit $ret

}



check_prereqs



rc=0
@@ -214,5 +236,6 @@ run_test test_zero_size_delete 
run_test test_open_unlink

run_test test_valid_filenames

run_test test_invalid_filenames

run_test test_no_set_size



exit $rc