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| author | Filipe Manana <fdmanana@suse.com> | 2020-07-29 12:17:50 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-08-21 10:48:17 +0300 |
| commit | 547cc243f66b9fae46530f67f7bc7c6c5b022747 (patch) | |
| tree | a857a0fa3206f6d4409b588d62dbd4365a1968f4 | |
| parent | 10742034076daea73acc17779e8f234060e03489 (diff) | |
| download | linux-547cc243f66b9fae46530f67f7bc7c6c5b022747.tar.xz | |
btrfs: fix memory leaks after failure to lookup checksums during inode logging
commit 4f26433e9b3eb7a55ed70d8f882ae9cd48ba448b upstream.
While logging an inode, at copy_items(), if we fail to lookup the checksums
for an extent we release the destination path, free the ins_data array and
then return immediately. However a previous iteration of the for loop may
have added checksums to the ordered_sums list, in which case we leak the
memory used by them.
So fix this by making sure we iterate the ordered_sums list and free all
its checksums before returning.
Fixes: 3650860b90cc2a ("Btrfs: remove almost all of the BUG()'s from tree-log.c")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/btrfs/tree-log.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index bcfb7a772c8e..3d30bf90d59e 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -3854,11 +3854,8 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, fs_info->csum_root, ds + cs, ds + cs + cl - 1, &ordered_sums, 0); - if (ret) { - btrfs_release_path(dst_path); - kfree(ins_data); - return ret; - } + if (ret) + break; } } } @@ -3871,7 +3868,6 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, * we have to do this after the loop above to avoid changing the * log tree while trying to change the log tree. */ - ret = 0; while (!list_empty(&ordered_sums)) { struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next, struct btrfs_ordered_sum, |