Florian Westphal
5c82010cef
netfilter: nft_set_pipapo_avx2: disable softinterrupts
...
[ Upstream commit a16909ae9982e931841c456061cb57fbaec9c59e ]
We need to disable softinterrupts, else we get following problem:
1. pipapo_avx2 called from process context; fpu usable
2. preempt_disable() called, pcpu scratchmap in use
3. softirq handles rx or tx, we re-enter pipapo_avx2
4. fpu busy, fallback to generic non-avx version
5. fallback reuses scratch map and index, which are in use
by the preempted process
Handle this same way as generic version by first disabling
softinterrupts while the scratchmap is in use.
Fixes: f0b3d33806 ("netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version")
Cc: Stefano Brivio <sbrivio@redhat.com >
Signed-off-by: Florian Westphal <fw@strlen.de >
Reviewed-by: Stefano Brivio <sbrivio@redhat.com >
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org >
Signed-off-by: Sasha Levin <sashal@kernel.org >
2024-08-03 08:54:37 +02:00
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