diff options
| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 23:51:52 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-29 18:25:13 +0300 |
| commit | 01083e3f9868a96e678496136cef195a89e292f9 (patch) | |
| tree | f3731e6bc5bdd36ad6b3fa4e3e093f8cb59fa0a7 /net/ipv6 | |
| parent | e75b73081f1ec169518773626c2ff3950476660b (diff) | |
| download | linux-01083e3f9868a96e678496136cef195a89e292f9.tar.xz | |
ip: Fix data-races around sysctl_ip_no_pmtu_disc.
[ 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: 1da177e4c3f4 ("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>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/af_inet6.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index dab4a047590b..3a91d0d40aec 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -226,7 +226,7 @@ lookup_protocol: RCU_INIT_POINTER(inet->mc_list, NULL); inet->rcv_tos = 0; - if (net->ipv4.sysctl_ip_no_pmtu_disc) + if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc)) inet->pmtudisc = IP_PMTUDISC_DONT; else inet->pmtudisc = IP_PMTUDISC_WANT; |