diff options
author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-13 22:51:51 +0200 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-07-15 12:49:55 +0200 |
commit | 8281b7ec5c56b71cb2cc5a1728b41607be66959c (patch) | |
tree | 1c9563f175e6e4528ca2f2d33256c18efca097bb /net/ipv4/ip_sockglue.c | |
parent | x86/speculation: Use DECLARE_PER_CPU for x86_spec_ctrl_current (diff) | |
download | linux-8281b7ec5c56b71cb2cc5a1728b41607be66959c.tar.xz linux-8281b7ec5c56b71cb2cc5a1728b41607be66959c.zip |
ip: Fix data-races around sysctl_ip_default_ttl.
While reading sysctl_ip_default_ttl, 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>
Diffstat (limited to 'net/ipv4/ip_sockglue.c')
-rw-r--r-- | net/ipv4/ip_sockglue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c index 445a9ecaefa1..d497d525dea3 100644 --- a/net/ipv4/ip_sockglue.c +++ b/net/ipv4/ip_sockglue.c @@ -1606,7 +1606,7 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname, { struct net *net = sock_net(sk); val = (inet->uc_ttl == -1 ? - net->ipv4.sysctl_ip_default_ttl : + READ_ONCE(net->ipv4.sysctl_ip_default_ttl) : inet->uc_ttl); break; } |