From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Filipe Manana <fdmanana@suse.com>,
David Sterba <dsterba@suse.com>, Sasha Levin <sashal@kernel.org>,
clm@fb.com, josef@toxicpanda.com, linux-btrfs@vger.kernel.org
Subject: [PATCH AUTOSEL 5.15 09/11] btrfs: remove pointless and double ulist frees in error paths of qgroup tests
Date: Thu, 10 Nov 2022 21:35:09 -0500 [thread overview]
Message-ID: <20221111023511.227800-9-sashal@kernel.org> (raw)
In-Reply-To: <20221111023511.227800-1-sashal@kernel.org>
From: Filipe Manana <fdmanana@suse.com>
[ Upstream commit d0ea17aec12ea0f7b9d2ed727d8ef8169d1e7699 ]
Several places in the qgroup self tests follow the pattern of freeing the
ulist pointer they passed to btrfs_find_all_roots() if the call to that
function returned an error. That is pointless because that function always
frees the ulist in case it returns an error.
Also In some places like at test_multiple_refs(), after a call to
btrfs_qgroup_account_extent() we also leave "old_roots" and "new_roots"
pointing to ulists that were freed, because btrfs_qgroup_account_extent()
has freed those ulists, and if after that the next call to
btrfs_find_all_roots() fails, we call ulist_free() on the "old_roots"
ulist again, resulting in a double free.
So remove those calls to reduce the code size and avoid double ulist
free in case of an error.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/btrfs/tests/qgroup-tests.c | 16 ++++------------
1 file changed, 4 insertions(+), 12 deletions(-)
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 19ba7d5b7d8f..a8c6637fe337 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -225,7 +225,6 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
*/
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
if (ret) {
- ulist_free(old_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -238,7 +237,6 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
if (ret) {
ulist_free(old_roots);
- ulist_free(new_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -250,17 +248,18 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
return ret;
}
+ /* btrfs_qgroup_account_extent() always frees the ulists passed to it. */
+ old_roots = NULL;
+ new_roots = NULL;
+
if (btrfs_verify_qgroup_counts(fs_info, BTRFS_FS_TREE_OBJECTID,
nodesize, nodesize)) {
test_err("qgroup counts didn't match expected values");
return -EINVAL;
}
- old_roots = NULL;
- new_roots = NULL;
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
if (ret) {
- ulist_free(old_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -272,7 +271,6 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
if (ret) {
ulist_free(old_roots);
- ulist_free(new_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -322,7 +320,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
if (ret) {
- ulist_free(old_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -335,7 +332,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
if (ret) {
ulist_free(old_roots);
- ulist_free(new_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -355,7 +351,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
if (ret) {
- ulist_free(old_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -368,7 +363,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
if (ret) {
ulist_free(old_roots);
- ulist_free(new_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -394,7 +388,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &old_roots, false);
if (ret) {
- ulist_free(old_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
@@ -407,7 +400,6 @@ static int test_multiple_refs(struct btrfs_root *root,
ret = btrfs_find_all_roots(&trans, fs_info, nodesize, 0, &new_roots, false);
if (ret) {
ulist_free(old_roots);
- ulist_free(new_roots);
test_err("couldn't find old roots: %d", ret);
return ret;
}
--
2.35.1
next prev parent reply other threads:[~2022-11-11 2:37 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 2:35 [PATCH AUTOSEL 5.15 01/11] RDMA/efa: Add EFA 0xefa2 PCI ID Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 02/11] btrfs: raid56: properly handle the error when unable to find the missing stripe Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 03/11] NFSv4: Retry LOCK on OLD_STATEID during delegation return Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 04/11] ACPI: x86: Add another system to quirk list for forcing StorageD3Enable Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 05/11] firmware: arm_scmi: Cleanup the core driver removal callback Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 06/11] i2c: tegra: Allocate DMA memory for DMA engine Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 07/11] i2c: i801: add lis3lv02d's I2C address for Vostro 5568 Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 08/11] drm/imx: imx-tve: Fix return type of imx_tve_connector_mode_valid Sasha Levin
2022-11-11 2:35 ` Sasha Levin [this message]
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 10/11] Bluetooth: L2CAP: Fix l2cap_global_chan_by_psm Sasha Levin
2022-11-11 2:35 ` [PATCH AUTOSEL 5.15 11/11] x86/cpu: Add several Intel server CPU model numbers Sasha Levin
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