net: do not pass flow_id to set_rps_cpu()

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[ Upstream commit 8a8a9fac9e ]

Blamed commit made the assumption that the RPS table for each receive
queue would have the same size, and that it would not change.

Compute flow_id in set_rps_cpu(), do not assume we can use the value
computed by get_rps_cpu(). Otherwise we risk out-of-bound access
and/or crashes.

Fixes: 48aa30443e ("net: Cache hash and flow_id to avoid recalculation")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Krishna Kumar <krikku@gmail.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260220222605.3468081-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Eric Dumazet 2026-02-20 22:26:05 +00:00 • committed by Sasha Levin

parent 96581749c7

commit 5455a232ed

1 changed files with 5 additions and 7 deletions

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net/core/dev.c

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