After commit fdc85222d58e ("kernfs: kvmalloc xattr value
instead of kmalloc"), simple xattr entry is allocated with
kvmalloc() instead of kmalloc(), so we should release it
with kvfree() instead of kfree().
Cc: stable@xxxxxxxxxxxxxxx # v5.7
Cc: Daniel Xu <dxu@xxxxxxxxx>
Cc: Chris Down <chris@xxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Tejun Heo <tj@xxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Fixes: fdc85222d58e ("kernfs: kvmalloc xattr value instead of kmalloc")
Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxxxx>
---
v1->v2:
- Fix freeing issue in simple_xattrs_free().
- Change patch subject.
include/linux/xattr.h | 3 ++-
mm/shmem.c | 2 +-
2 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index 47eaa34f8761..c5afaf8ca7a2 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -15,6 +15,7 @@
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/spinlock.h>
+#include <linux/mm.h>
#include <uapi/linux/xattr.h>
struct inode;
@@ -94,7 +95,7 @@ static inline void simple_xattrs_free(struct simple_xattrs *xattrs)
list_for_each_entry_safe(xattr, node, &xattrs->head, list) {
kfree(xattr->name);
- kfree(xattr);
+ kvfree(xattr);
}
}
diff --git a/mm/shmem.c b/mm/shmem.c
index a0dbe62f8042..b2abca3f7f33 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3178,7 +3178,7 @@ static int shmem_initxattrs(struct inode *inode,
new_xattr->name = kmalloc(XATTR_SECURITY_PREFIX_LEN + len,
GFP_KERNEL);
if (!new_xattr->name) {
- kfree(new_xattr);
+ kvfree(new_xattr);
return -ENOMEM;
}
--
2.20.1
