xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ip: Fix data-races around sysctl_ip_no_pmtu_disc.

Browse Source 
[ Upstream commit 0968d2a441bf6afb551fd99e60fa65ed67068963 ]

While reading sysctl_ip_no_pmtu_disc, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its readers.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
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>
This commit is contained in:
Kuniyuki Iwashima
2022-07-13 13:51:52 -07:00
committed by Greg Kroah-Hartman
parent 77836dbe35
commit 5e343e3ef4
4 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
net/ipv4/icmp.c
View File

@@ -887,7 +887,7 @@ static bool icmp_unreach(struct sk_buff *skb)
* values please see
* Documentation/networking/ip-sysctl.rst
*/
switch (net->ipv4.sysctl_ip_no_pmtu_disc) {
switch (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc)) {
default:
net_dbg_ratelimited("%pI4: fragmentation needed and DF set\n",
&iph->daddr);