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authorKuniyuki Iwashima <kuniyu@amazon.com>2022-08-23 10:46:53 -0700
committerDavid S. Miller <davem@davemloft.net>2022-08-24 13:46:58 +0100
commit2e0c42374ee32e72948559d2ae2f7ba3dc6b977c (patch)
treededb5016d36856fd34d13fbcfc7d93823b9b8cd9
parente59ef36f0795696ab229569c153936bfd068d21c (diff)
downloadlinux-2e0c42374ee32e72948559d2ae2f7ba3dc6b977c.tar.bz2
net: Fix a data-race around netdev_budget.
While reading netdev_budget, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader. Fixes: 51b0bdedb8e7 ("[NET]: Separate two usages of netdev_max_backlog.") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.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 4705e6630efa..c83e23cfc57d 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6666,7 +6666,7 @@ 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);
- int budget = netdev_budget;
+ int budget = READ_ONCE(netdev_budget);
LIST_HEAD(list);
LIST_HEAD(repoll);