From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit b6293c821ea8fa2a631a2112cd86cd435effeb8b ]
Callers of alloc_test_extent_buffer have not correctly interpreted the
return value as error pointer, as alloc_test_extent_buffer should behave
as alloc_extent_buffer. The self-tests were unaffected but
btrfs_find_create_tree_block could call both functions and that would
cause problems up in the call chain.
Fixes: faa2dbf004e8 ("Btrfs: add sanity tests for new qgroup accounting code")
CC: stable@xxxxxxxxxxxxxxx # 4.4+
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: David Sterba <dsterba@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/btrfs/extent_io.c | 6 ++++--
fs/btrfs/tests/free-space-tree-tests.c | 6 +++---
fs/btrfs/tests/qgroup-tests.c | 4 ++--
3 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 4d901200be13..37a28e2369b9 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4994,12 +4994,14 @@ struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
return eb;
eb = alloc_dummy_extent_buffer(fs_info, start, nodesize);
if (!eb)
- return NULL;
+ return ERR_PTR(-ENOMEM);
eb->fs_info = fs_info;
again:
ret = radix_tree_preload(GFP_NOFS);
- if (ret)
+ if (ret) {
+ exists = ERR_PTR(ret);
goto free_eb;
+ }
spin_lock(&fs_info->buffer_lock);
ret = radix_tree_insert(&fs_info->buffer_radix,
start >> PAGE_SHIFT, eb);
diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c
index a724d9a79bd2..5e3b875d87e2 100644
--- a/fs/btrfs/tests/free-space-tree-tests.c
+++ b/fs/btrfs/tests/free-space-tree-tests.c
@@ -476,9 +476,9 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
root->node = alloc_test_extent_buffer(root->fs_info,
nodesize, nodesize);
- if (!root->node) {
- test_msg("Couldn't allocate dummy buffer\n");
- ret = -ENOMEM;
+ if (IS_ERR(root->node)) {
+ test_msg("couldn't allocate dummy buffer\n");
+ ret = PTR_ERR(root->node);
goto out;
}
btrfs_set_header_level(root->node, 0);
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 9c6666692341..e0aa6b9786fa 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -488,9 +488,9 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
*/
root->node = alloc_test_extent_buffer(root->fs_info, nodesize,
nodesize);
- if (!root->node) {
+ if (IS_ERR(root->node)) {
test_msg("Couldn't allocate dummy buffer\n");
- ret = -ENOMEM;
+ ret = PTR_ERR(root->node);
goto out;
}
btrfs_set_header_level(root->node, 0);
--
2.20.1
