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| author | Yan, Zheng <zheng.yan@oracle.com> | 2010-05-26 17:20:30 +0200 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-05-27 03:35:33 +0200 |
| commit | 5bdd3536cbbe2ecd94ecc14410c6b1b31da16381 (patch) | |
| tree | 7fd9cd2cb497f6150a5dfde4528ba6ba64144e40 | |
| parent | Btrfs: fix preallocation and nodatacow checks in O_DIRECT (diff) | |
| download | linux-5bdd3536cbbe2ecd94ecc14410c6b1b31da16381.tar.xz linux-5bdd3536cbbe2ecd94ecc14410c6b1b31da16381.zip | |
Btrfs: Fix block generation verification race
After the path is released, the generation number got from block
pointer is no long valid. The race may cause disk corruption, because
verify_parent_transid() calls clear_extent_buffer_uptodate() when
generation numbers mismatch.
Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/ctree.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c index acd532af8e55..0d1d966b0fe4 100644 --- a/fs/btrfs/ctree.c +++ b/fs/btrfs/ctree.c @@ -1604,7 +1604,7 @@ read_block_for_search(struct btrfs_trans_handle *trans, btrfs_release_path(NULL, p); ret = -EAGAIN; - tmp = read_tree_block(root, blocknr, blocksize, gen); + tmp = read_tree_block(root, blocknr, blocksize, 0); if (tmp) { /* * If the read above didn't mark this buffer up to date, |