diff options
| author | Fan Li <fanofcode.li@samsung.com> | 2016-01-04 15:56:50 +0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:32:46 +0200 |
| commit | 55307b5a9b37db2f869d501294487856877cd6cf (patch) | |
| tree | be627e8c296d4c10898be09ff4c27c66bc6f7a78 | |
| parent | ff44e1d519b3b5e841eb9180c6105450908d5af7 (diff) | |
f2fs: read isize while holding i_mutex in fiemap
make sure the isize we read doesn't change during the process.
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
| -rw-r--r-- | fs/f2fs/data.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index e618451b4..e04f2fa96 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -785,7 +785,7 @@ 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; @@ -801,6 +801,8 @@ 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; |