[ Upstream commit
94a997637c5b562fa0ca44fca1d2cd02ec08236f ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
/* Make sure queue is ready before it can be seen by others */
smp_wmb();
- *queue = q;
+ WRITE_ONCE(*queue, q);
return 0;
}