Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  net/x25: Fix potential double free of skb  When alloc_skb fails in x25_queue_rx_frame it calls kfree_skb(skb) at line 48 and returns 1 (error). This error propagates back through the call chain:  x25_queue_rx_frame returns 1     |     v x25_state3_machine receives the return value 1 and takes the else branch at line 278, setting queued=0 and returning 0     |     v x25_process_rx_frame returns queued=0     |     v x25_backlog_rcv at line 452 sees queued=0 and calls kfree_skb(skb) again  This would free the same skb twice. Looking at x25_backlog_rcv:  net/x25/x25_in.c:x25_backlog_rcv() {     ...     queued = x25_process_rx_frame(sk, skb);     ...     if (!queued)         kfree_skb(skb); }