btrfs: ref-verify: fix memory leaks
commit f311ade3 upstream. In btrfs_ref_tree_mod(), 'ref' and 'ra' are allocated through kzalloc() and kmalloc(), respectively. In the following code, if an error occurs, the execution will be redirected to 'out' or 'out_unlock' and the function will be exited. However, on some of the paths, 'ref' and 'ra' are not deallocated, leading to memory leaks. For example, if 'action' is BTRFS_ADD_DELAYED_EXTENT, add_block_entry() will be invoked. If the return value indicates an error, the execution will be redirected to 'out'. But, 'ref' is not deallocated on this path, causing a memory leak. To fix the above issues, deallocate both 'ref' and 'ra' before exiting from the function when an error is encountered. CC: stable@vger.kernel.org # 4.15+ Signed-off-by:Wenwen Wang <wenwen@cs.uga.edu> Reviewed-by:
David Sterba <dsterba@suse.com> Signed-off-by:
David Sterba <dsterba@suse.com> Signed-off-by:
Paul Gortmaker <paul.gortmaker@windriver.com>
parent
4c6832f4
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