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由 Josef Bacik 提交于
stable inclusion from stable-5.10.22 commit a01415e5e862a60a52b10081532e09f9b3503592 bugzilla: 50796 -------------------------------- commit 95c85fba upstream. It's wrong calling btrfs_put_block_group in __btrfs_return_cluster_to_free_space if the block group passed is different than the block group the cluster represents. As this means the cluster doesn't have a reference to the passed block group. This results in double put and a use-after-free bug. Fix this by simply bailing if the block group we passed in does not match the block group on the cluster. Fixes: fa9c0d79 ("Btrfs: rework allocation clustering") CC: stable@vger.kernel.org # 4.4+ Signed-off-by: NJosef Bacik <josef@toxicpanda.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> [ update changelog ] Signed-off-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NChen Jun <chenjun102@huawei.com> Acked-by: N Weilong Chen <chenweilong@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
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