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(parent: 310f420) | patch
xsk: avoid store-tearing when assigning queues
authorBjörn Töpel <bjorn.topel@intel.com>
Wed, 4 Sep 2019 11:49:10 +0000 (13:49 +0200)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 5 Sep 2019 12:11:52 +0000 (14:11 +0200)
commit94a997637c5b562fa0ca44fca1d2cd02ec08236f
tree39565fb606c3a0c40dc736a84d3652938886cfddtree | snapshot
parent310f4204eeb6053e35c277a23d9c179e8e32322ecommit | diff
xsk: avoid store-tearing when assigning queues

Use WRITE_ONCE when doing the store of tx, rx, fq, and cq, to avoid
potential store-tearing. These members are read outside of the control
mutex in the mmap implementation.

Acked-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Fixes: 37b076933a8e ("xsk: add missing write- and data-dependency barrier")
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
net/xdp/xsk.c diff | blob | history
Domain: System / Kernel;