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authorKuniyuki Iwashima <kuniyu@amazon.com>2022-08-23 10:46:55 -0700
committerDavid S. Miller <davem@davemloft.net>2022-08-24 13:46:58 +0100
commitfa45d484c52c73f79db2c23b0cdfc6c6455093ad (patch)
treefa4046a28fd1b138945ad4e81880029d5b22a793 /net
parent657b991afb89d25fe6c4783b1b75a8ad4563670d (diff)
net: Fix a data-race around netdev_budget_usecs.
While reading netdev_budget_usecs, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader. Fixes: 7acf8a1e8a28 ("Replace 2 jiffies with sysctl netdev_budget_usecs to enable softirq tuning") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/dev.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index c83e23cfc57d..8221322d86db 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6665,7 +6665,7 @@ static __latent_entropy void net_rx_action(struct softirq_action *h)
{
struct softnet_data *sd = this_cpu_ptr(&softnet_data);
unsigned long time_limit = jiffies +
- usecs_to_jiffies(netdev_budget_usecs);
+ usecs_to_jiffies(READ_ONCE(netdev_budget_usecs));
int budget = READ_ONCE(netdev_budget);
LIST_HEAD(list);
LIST_HEAD(repoll);