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| author | Fan Li <fanofcode.li@samsung.com> | 2016-01-04 07:56:50 (GMT) |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-01-07 03:15:49 (GMT) |
| commit | de1475cc53b2d6442443dcf5d66ed0fc50ed3c7e (patch) | |
| tree | c0f535152439e214a003c764ad96241c13418330 | |
| parent | 957efb0c2144cc5ff1795f43bf2d2ca430eaa227 (diff) | |
| download | linux-de1475cc53b2d6442443dcf5d66ed0fc50ed3c7e.tar.xz | |
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 89a978c..ac5bea0 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -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; |