diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2019-03-13 15:15:49 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-04 09:20:12 +0200 |
| commit | 947bd0d9bdbc3191835612c2a69eab7d8cebf746 (patch) | |
| tree | 9158b65da910798bbfb4acc0f8e6eac262f56e1b /include/net | |
| parent | fc055dffa5751859f5043f1c1e91bfafe2c6a6e9 (diff) | |
xsk: fix umem memory leak on cleanup
[ Upstream commit 044175a06706d516aa42874bb44dbbfc3c4d20eb ]
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: c0c77d8fb787 ("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>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/xdp_sock.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/net/xdp_sock.h b/include/net/xdp_sock.h index 7161856bcf9c..c2c10cc9ffa0 100644 --- a/include/net/xdp_sock.h +++ b/include/net/xdp_sock.h @@ -34,7 +34,6 @@ struct xdp_umem { u32 headroom; u32 chunk_size_nohr; struct user_struct *user; - struct pid *pid; unsigned long address; refcount_t users; struct work_struct work; |