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Commit 856bf3e5 authored by Chris Mason's avatar Chris Mason
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Btrfs: Avoid extent_buffer lru corruption 

Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
parent 257d0ce3
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Showing with 7 additions and 1 deletion
fs/btrfs/extent_map.c
View file @ 856bf3e5
......@@ -2047,7 +2047,7 @@ static int add_lru(struct extent_map_tree *tree, struct extent_buffer *eb)
rm = list_entry(tree->buffer_lru.prev,
struct extent_buffer, lru);
tree->lru_size--;
list_del(&rm->lru);
list_del_init(&rm->lru);
free_extent_buffer(rm);
}
} else
......@@ -2187,6 +2187,9 @@ lru_add:
return eb;
fail:
spin_lock(&tree->lru_lock);
list_del_init(&eb->lru);
spin_unlock(&tree->lru_lock);
if (!atomic_dec_and_test(&eb->refs))
return NULL;
for (index = 0; index < i; index++) {
......@@ -2246,6 +2249,9 @@ lru_add:
spin_unlock(&tree->lru_lock);
return eb;
fail:
spin_lock(&tree->lru_lock);
list_del_init(&eb->lru);
spin_unlock(&tree->lru_lock);
if (!atomic_dec_and_test(&eb->refs))
return NULL;
for (index = 0; index < i; index++) {
......
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