Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  espintcp: Fix race condition in espintcp_close()  This issue was discovered during a code audit.  After cancel_work_sync() is called from espintcp_close(), espintcp_tx_work() can still be scheduled from paths such as the Delayed ACK handler or ksoftirqd. As a result, the espintcp_tx_work() worker may dereference a freed espintcp ctx or sk.  The following is a simple race scenario:             cpu0                             cpu1    espintcp_close()     cancel_work_sync(&ctx->work);                                      espintcp_write_space()                                        schedule_work(&ctx->work);  To prevent this race condition, cancel_work_sync() is replaced with disable_work_sync().