Commit 5bdd3536 authored by Yan, Zheng's avatar Yan, Zheng Committed by Chris Mason
Browse files

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: default avatarYan Zheng <>
Signed-off-by: default avatarChris Mason <>
parent 46bfbb5c
......@@ -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,
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment