linux-stable/net/xdp
Björn Töpel 947bd0d9bd xsk: fix umem memory leak on cleanup
[ Upstream commit 044175a067 ]

When the umem is cleaned up, the task that created it might already be
gone. If the task was gone, the xdp_umem_release function did not free
the pages member of struct xdp_umem.

It turned out that the task lookup was not needed at all; The code was
a left-over when we moved from task accounting to user accounting [1].

This patch fixes the memory leak by removing the task lookup logic
completely.

[1] https://lore.kernel.org/netdev/20180131135356.19134-3-bjorn.topel@gmail.com/

Link: https://lore.kernel.org/netdev/c1cb2ca8-6a14-3980-8672-f3de0bb38dfd@suse.cz/
Fixes: c0c77d8fb7 ("xsk: add user memory registration support sockopt")
Reported-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Sasha Levin (Microsoft) <sashal@kernel.org>
2019-05-04 09:20:12 +02:00
..
Kconfig
Makefile
xdp_umem.c xsk: fix umem memory leak on cleanup 2019-05-04 09:20:12 +02:00
xdp_umem.h
xdp_umem_props.h
xsk.c xsk: do not call synchronize_net() under RCU read lock 2018-10-11 10:19:01 +02:00
xsk_queue.c
xsk_queue.h xsk: fix poll/POLLIN premature returns 2018-07-26 02:53:10 +02:00