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Date: Fri, 16 Jan 2015 03:09:20 -0500 (EST) From: David Miller <davem@...emloft.net> To: subashab@...eaurora.org Cc: netdev@...r.kernel.org Subject: Re: [PATCH] net: ipv4: Fix incorrect free in ICMP receive From: subashab@...eaurora.org Date: Fri, 16 Jan 2015 07:48:36 -0000 > An exception is seen in ICMP ping receive path where the skb > destructor sock_rfree() tries to access a freed socket. This happens > because ping_rcv() releases socket reference with sock_put() and this > internally frees up the socket. Later icmp_rcv() will try to free the > skb and as part of this, skb destructor is called and panics as the > socket is freed already in ping_rcv(). At the point in which foo_sock_destruct() is called, the 'sk' is not freed. We're operating on it inside of the destruct function itself. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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