Commit de1475cc authored by Fan Li's avatar Fan Li Committed by Jaegeuk Kim
Browse files

f2fs: read isize while holding i_mutex in fiemap 



make sure the isize we read doesn't change during the process.

Signed-off-by: default avatarFan li <fanofcode.li@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 957efb0c

fs/f2fs/data.c

+3 −1
Original line number Diff line number Diff line
@@ -784,7 +784,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 
{

	struct buffer_head map_bh;

	sector_t start_blk, last_blk;

	loff_t isize = i_size_read(inode);

	loff_t isize;

	u64 logical = 0, phys = 0, size = 0;

	u32 flags = 0;

	int ret = 0;
@@ -800,6 +800,8 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, 
	}



	mutex_lock(&inode->i_mutex);



	isize = i_size_read(inode);

	if (start >= isize)

		goto out;