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(parent: 94a9976) | patch
xsk: avoid store-tearing when assigning umem
authorBjörn Töpel <bjorn.topel@intel.com>
Wed, 4 Sep 2019 11:49:11 +0000 (13:49 +0200)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 5 Sep 2019 12:11:52 +0000 (14:11 +0200)
commit9764f4b301c3e7eb3b75eec85b73cad449cdbb0d
tree31b08153807248a101bd3d1c5018c3d9b5fd45abtree | snapshot
parent94a997637c5b562fa0ca44fca1d2cd02ec08236fcommit | diff
xsk: avoid store-tearing when assigning umem

The umem member of struct xdp_sock is read outside of the control
mutex, in the mmap implementation, and needs a WRITE_ONCE to avoid
potential store-tearing.

Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Fixes: 423f38329d26 ("xsk: add umem fill queue support and mmap")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
net/xdp/xsk.c diff | blob | history
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