[PATCH] f2fs: set dentry bits on random location in memory

From: Jaegeuk Kim
Date: Wed Aug 31 2016 - 21:08:34 EST


This fixes pointer panic when using inline_dentry, which was triggered when
backporting to 3.10.

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/dir.c | 2 +-
fs/f2fs/inline.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 9316d8a..2fb20fc 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -510,7 +510,7 @@ void f2fs_update_dentry(nid_t ino, umode_t mode, struct f2fs_dentry_ptr *d,
de->ino = cpu_to_le32(ino);
set_de_type(de, mode);
for (i = 0; i < slots; i++) {
- test_and_set_bit_le(bit_pos + i, (void *)d->bitmap);
+ __set_bit_le(bit_pos + i, (void *)d->bitmap);
/* avoid wrong garbage data for readdir */
if (i)
(de + i)->name_len = 0;
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index 8a96107..4d526f3 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -566,7 +566,7 @@ void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
inline_dentry = inline_data_addr(page);
bit_pos = dentry - inline_dentry->dentry;
for (i = 0; i < slots; i++)
- test_and_clear_bit_le(bit_pos + i,
+ __clear_bit_le(bit_pos + i,
&inline_dentry->dentry_bitmap);

set_page_dirty(page);
--
2.8.3