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-rw-r--r--fs/xattr.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/fs/xattr.c b/fs/xattr.c
index a14d842ccb2..d14afbae3c1 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -19,8 +19,9 @@
#include <linux/export.h>
#include <linux/fsnotify.h>
#include <linux/audit.h>
-#include <asm/uaccess.h>
+#include <linux/vmalloc.h>
+#include <asm/uaccess.h>
/*
* Check permissions for extended attribute access. This is a bit complicated
@@ -492,13 +493,18 @@ listxattr(struct dentry *d, char __user *list, size_t size)
{
ssize_t error;
char *klist = NULL;
+ char *vlist = NULL; /* If non-NULL, we used vmalloc() */
if (size) {
if (size > XATTR_LIST_MAX)
size = XATTR_LIST_MAX;
klist = kmalloc(size, __GFP_NOWARN | GFP_KERNEL);
- if (!klist)
- return -ENOMEM;
+ if (!klist) {
+ vlist = vmalloc(size);
+ if (!vlist)
+ return -ENOMEM;
+ klist = vlist;
+ }
}
error = vfs_listxattr(d, klist, size);
@@ -510,7 +516,10 @@ listxattr(struct dentry *d, char __user *list, size_t size)
than XATTR_LIST_MAX bytes. Not possible. */
error = -E2BIG;
}
- kfree(klist);
+ if (vlist)
+ vfree(vlist);
+ else
+ kfree(klist);
return error;
}