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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-08-23 20:46:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-31 18:15:20 +0300 |
| commit | 12a34d7f0463ebb6db01977091b5cda46d9060bc (patch) | |
| tree | 0a7d27653b4badc114034031e08bad6fef0c1851 | |
| parent | 410c88314ce351c9c77ec68da1d37bd91ddd76a2 (diff) | |
| download | linux-12a34d7f0463ebb6db01977091b5cda46d9060bc.tar.xz | |
net: Fix a data-race around netdev_budget.
[ Upstream commit 2e0c42374ee32e72948559d2ae2f7ba3dc6b977c ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | net/core/dev.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 1ea75768c5b2..c4eb1b666a21 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6880,7 +6880,7 @@ 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); |