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-rw-r--r--drivers/firmware/efivars.c4
-rw-r--r--tools/testing/selftests/efivarfs/efivarfs.sh59
2 files changed, 61 insertions, 2 deletions
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 0d504971ed4c..1b9a6e17e3dc 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -974,8 +974,8 @@ static bool efivarfs_valid_name(const char *str, int len)
if (len < GUID_LEN + 2)
return false;
- /* GUID should be right after the first '-' */
- if (s - 1 != strchr(str, '-'))
+ /* GUID must be preceded by a '-' */
+ if (*(s - 1) != '-')
return false;
/*
diff --git a/tools/testing/selftests/efivarfs/efivarfs.sh b/tools/testing/selftests/efivarfs/efivarfs.sh
index 880cdd5dc63f..77edcdcc016b 100644
--- a/tools/testing/selftests/efivarfs/efivarfs.sh
+++ b/tools/testing/selftests/efivarfs/efivarfs.sh
@@ -125,6 +125,63 @@ test_open_unlink()
./open-unlink $file
}
+# test that we can create a range of filenames
+test_valid_filenames()
+{
+ local attrs='\x07\x00\x00\x00'
+ local ret=0
+
+ local file_list="abc dump-type0-11-1-1362436005 1234 -"
+ for f in $file_list; do
+ local file=$efivarfs_mount/$f-$test_guid
+
+ printf "$attrs\x00" > $file
+
+ if [ ! -e $file ]; then
+ echo "$file could not be created" >&2
+ ret=1
+ else
+ rm $file
+ fi
+ done
+
+ exit $ret
+}
+
+test_invalid_filenames()
+{
+ local attrs='\x07\x00\x00\x00'
+ local ret=0
+
+ local file_list="
+ -1234-1234-1234-123456789abc
+ foo
+ foo-bar
+ -foo-
+ foo-barbazba-foob-foob-foob-foobarbazfoo
+ foo-------------------------------------
+ -12345678-1234-1234-1234-123456789abc
+ a-12345678=1234-1234-1234-123456789abc
+ a-12345678-1234=1234-1234-123456789abc
+ a-12345678-1234-1234=1234-123456789abc
+ a-12345678-1234-1234-1234=123456789abc
+ 1112345678-1234-1234-1234-123456789abc"
+
+ for f in $file_list; do
+ local file=$efivarfs_mount/$f
+
+ printf "$attrs\x00" 2>/dev/null > $file
+
+ if [ -e $file ]; then
+ echo "Creating $file should have failed" >&2
+ rm $file
+ ret=1
+ fi
+ done
+
+ exit $ret
+}
+
check_prereqs
rc=0
@@ -135,5 +192,7 @@ run_test test_create_read
run_test test_delete
run_test test_zero_size_delete
run_test test_open_unlink
+run_test test_valid_filenames
+run_test test_invalid_filenames
exit $rc