icmp: prevent possible overflow in icmp_global_allow()

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[ Upstream commit 034bbd8062 ]

Following expression can overflow
if sysctl_icmp_msgs_per_sec is big enough.

sysctl_icmp_msgs_per_sec * delta / HZ;

Fixes: 4cdf507d54 ("icmp: add a global rate limitation")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260216142832.3834174-2-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 2026-02-16 14:28:28 +00:00 • committed by Sasha Levin

parent a1f686d273

commit 5aea79b910

1 changed files with 2 additions and 1 deletions

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net/ipv4/icmp.c

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