Ciara Loftus a6e944f25c xsk: Fix generic transmit when completion queue reservation fails ... Two points of potential failure in the generic transmit function are: 1. completion queue (cq) reservation failure. 2. skb allocation failure Originally the cq reservation was performed first, followed by the skb allocation. Commit 675716400d ("xdp: fix possible cq entry leak") reversed the order because at the time there was no mechanism available to undo the cq reservation which could have led to possible cq entry leaks in the event of skb allocation failure. However if the skb allocation is performed first and the cq reservation then fails, the xsk skb destructor is called which blindly adds the skb address to the already full cq leading to undefined behavior. This commit restores the original order (cq reservation followed by skb allocation) and uses the xskq_prod_cancel helper to undo the cq reserve in event of skb allocation failure. Fixes: 675716400d ("xdp: fix possible cq entry leak") Signed-off-by: Ciara Loftus <ciara.loftus@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/20220614070746.8871-1-ciara.loftus@intel.com		2022-06-14 16:49:29 +02:00
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Kconfig	…
Makefile	…
xdp_umem.c	xsk: Use kvcalloc to support large umems	2021-05-25 13:11:50 +02:00
xdp_umem.h	…
xsk.c	xsk: Fix generic transmit when completion queue reservation fails	2022-06-14 16:49:29 +02:00
xsk.h	xdp: Add proper __rcu annotations to redirect map entries	2021-06-24 19:41:15 +02:00
xsk_buff_pool.c	xsk: Fix possible crash when multiple sockets are created	2022-04-26 16:19:54 +02:00
xsk_diag.c	…
xsk_queue.c	…
xsk_queue.h	xsk: Fix handling of invalid descriptors in XSK TX batching API	2022-06-08 16:20:07 +02:00
xskmap.c	bpf: Compute map_btf_id during build time	2022-04-26 11:35:21 -07:00