If the user sets xattr->name[0] to NUL then we would read one character
before the start of the array. This bug seems harmless as far as I can
see but perhaps it would trigger a warning in KASAN.
Fixes:
fa516b66a1bf ("EVM: Allow runtime modification of the set of verified xattrs")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
/* Remove any trailing newline */
len = strlen(xattr->name);
- if (xattr->name[len-1] == '\n')
+ if (len && xattr->name[len-1] == '\n')
xattr->name[len-1] = '\0';
if (strcmp(xattr->name, ".") == 0) {