From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Kuniyuki Iwashima <kuniyu@amazon.com>,
"David S. Miller" <davem@davemloft.net>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.14 17/42] net: Fix a data-race around netdev_budget.
Date: Fri, 2 Sep 2022 14:18:41 +0200 [thread overview]
Message-ID: <20220902121359.401149952@linuxfoundation.org> (raw)
In-Reply-To: <20220902121358.773776406@linuxfoundation.org>
From: Kuniyuki Iwashima <kuniyu@amazon.com>
[ 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>
---
net/core/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 51721fb2e30cf..f6d3cbc57425c 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5649,7 +5649,7 @@ 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);
--
2.35.1
next prev parent reply other threads:[~2022-09-02 12:24 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-02 12:18 [PATCH 4.14 00/42] 4.14.292-rc1 review Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 01/42] audit: fix potential double free on error path from fsnotify_add_inode_mark Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 02/42] parisc: Fix exception handler for fldw and fstw instructions Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 03/42] pinctrl: amd: Dont save/restore interrupt status and wake status bits Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 04/42] xfrm: fix refcount leak in __xfrm_policy_check() Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 05/42] af_key: Do not call xfrm_probe_algs in parallel Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 06/42] rose: check NULL rose_loopback_neigh->loopback Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 07/42] bonding: 802.3ad: fix no transmission of LACPDUs Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 08/42] net: ipvtap - add __init/__exit annotations to module init/exit funcs Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 09/42] netfilter: ebtables: reject blobs that dont provide all entry points Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 10/42] netfilter: nft_payload: report ERANGE for too long offset and length Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 11/42] netfilter: nft_payload: do not truncate csum_offset and csum_type Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 12/42] net: Fix data-races around weight_p and dev_weight_[rt]x_bias Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 13/42] ratelimit: Fix data-races in ___ratelimit() Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 14/42] net: Fix a data-race around sysctl_tstamp_allow_data Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 15/42] net: Fix a data-race around sysctl_net_busy_poll Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 16/42] net: Fix a data-race around sysctl_net_busy_read Greg Kroah-Hartman
2022-09-02 12:18 ` Greg Kroah-Hartman [this message]
2022-09-02 12:18 ` [PATCH 4.14 18/42] net: Fix a data-race around netdev_budget_usecs Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 19/42] net: Fix a data-race around sysctl_somaxconn Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 20/42] ixgbe: stop resetting SYSTIME in ixgbe_ptp_start_cyclecounter Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 21/42] btrfs: check if root is readonly while setting security xattr Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 22/42] loop: Check for overflow while configuring loop Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 23/42] asm-generic: sections: refactor memory_intersects Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 24/42] mm/hugetlb: fix hugetlb not supporting softdirty tracking Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 25/42] md: call __md_stop_writes in md_stop Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 26/42] mm: Force TLB flush for PFNMAP mappings before unlink_file_vma() Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 27/42] arm64: map FDT as RW for early_init_dt_scan() Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 28/42] s390/mm: do not trigger write fault when vma does not allow VM_WRITE Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 29/42] x86/cpu: Add Tiger Lake to Intel family Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 30/42] x86/bugs: Add "unknown" reporting for MMIO Stale Data Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 31/42] kbuild: Fix include path in scripts/Makefile.modpost Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 32/42] Bluetooth: L2CAP: Fix build errors in some archs Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 33/42] media: pvrusb2: fix memory leak in pvr_probe Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 34/42] HID: hidraw: fix memory leak in hidraw_release() Greg Kroah-Hartman
2022-09-02 12:18 ` [PATCH 4.14 35/42] fbdev: fb_pm2fb: Avoid potential divide by zero error Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 36/42] ftrace: Fix NULL pointer dereference in is_ftrace_trampoline when ftrace is dead Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 37/42] mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 38/42] neigh: fix possible DoS due to net iface start/stop loop Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 39/42] s390/hypfs: avoid error message under KVM Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 40/42] netfilter: conntrack: NF_CONNTRACK_PROCFS should no longer default to y Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 41/42] kprobes: dont call disarm_kprobe() for disabled kprobes Greg Kroah-Hartman
2022-09-02 12:19 ` [PATCH 4.14 42/42] net: neigh: dont call kfree_skb() under spin_lock_irqsave() Greg Kroah-Hartman
2022-09-02 16:35 ` [PATCH 4.14 00/42] 4.14.292-rc1 review Jon Hunter
2022-09-03 0:34 ` Guenter Roeck
2022-09-03 13:14 ` Naresh Kamboju
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220902121359.401149952@linuxfoundation.org \
--to=gregkh@linuxfoundation.org \
--cc=davem@davemloft.net \
--cc=kuniyu@amazon.com \
--cc=linux-kernel@vger.kernel.org \
--cc=sashal@kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.