Davide Caratti 4fbefeab88 net/sched: sch_fq: fix integer overflow of "credit" ... [ Upstream commit 7041101ff6 ] if sch_fq is configured with "initial quantum" having values greater than INT_MAX, the first assignment of "credit" does signed integer overflow to a very negative value. In this situation, the syzkaller script provided by Cristoph triggers the CPU soft-lockup warning even with few sockets. It's not an infinite loop, but "credit" wasn't probably meant to be minus 2Gb for each new flow. Capping "initial quantum" to INT_MAX proved to fix the issue. v2: validation of "initial quantum" is done in fq_policy, instead of open coding in fq_change() _ suggested by Jakub Kicinski Reported-by: Christoph Paasch <cpaasch@apple.com> Link: https://github.com/multipath-tcp/mptcp_net-next/issues/377 Fixes: afe4fd0624 ("pkt_sched: fq: Fair Queue packet scheduler") Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Davide Caratti <dcaratti@redhat.com> Link: https://lore.kernel.org/r/7b3a3c7e36d03068707a021760a194a8eb5ad41a.1682002300.git.dcaratti@redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2023-05-11 23:03:26 +09:00
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crypto/chacha20-s390
cxl	tools/testing/cxl: Add a single-port host-bridge regression config	2022-11-04 16:01:24 -07:00
fault-injection
ktest	ktest.pl: Add RUN_TIMEOUT option with default unlimited	2023-03-10 09:34:27 +01:00
kunit	kunit: tool: Don't download risc-v opensbi firmware with wget	2022-10-07 10:16:28 -06:00
memblock	Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."	2023-02-22 12:59:50 +01:00
nvdimm
radix-tree	maple_tree: fix write memory barrier of nodes once dead for RCU mode	2023-04-20 12:35:12 +02:00
scatterlist
selftests	net/sched: sch_fq: fix integer overflow of "credit"	2023-05-11 23:03:26 +09:00
vsock