binder: fix is_failure flag for superseded transaction cleanup

Overview

In the Linux kernel, the following vulnerability has been resolved:

binder: fix is_failure flag for superseded transaction cleanup

When a TF_UPDATE_TXN transaction supersedes a pending async transaction, binder_release_entire_buffer() is called with is_failure=false. Since the superseded transaction was never delivered, binder_apply_fd_fixups() was never called and no fds were installed in the target process.

With is_failure=false, the BINDER_TYPE_FDA cleanup handler interprets stale buffer contents as installed fd numbers and passes them to binder_deferred_fd_close(), closing unrelated file descriptors.

Pass is_failure=true since the transaction was never delivered to the target, matching the semantics of all other undelivered-transaction cleanup paths.

Affected

• Linux >= 9864bb4801331daa48514face9d0f4861e4d485b < 60a9f7323ae7318a7cce0d387c318da24f1e8726
• Linux >= 9864bb4801331daa48514face9d0f4861e4d485b < 86cdcc87d4ba60aebf94ba3346b3c900c5cd79ff
• Linux >= 9864bb4801331daa48514face9d0f4861e4d485b < 1ab671b50714ad8e359cf37eb041d8044319ccdc
• Linux >= 9864bb4801331daa48514face9d0f4861e4d485b < 22c135635fdd9816c0ef140d6de7b2e4fdf73e89
• Linux 6.0

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.