diff options
| author |   Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-06 16:40:00 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-07-08 12:10:33 +0100 |
| commit | 310731e2f1611d1d13aae237abcf8e66d33345d5 (patch) | |
| tree | e5fdd4fa9b0ce21dd4d0ead99f7ea2754526c613 /include/net/sock.h | |
| parent | inetpeer: Fix data-races around sysctl. (diff) | |
| download | linux-dev-310731e2f1611d1d13aae237abcf8e66d33345d5.tar.xz linux-dev-310731e2f1611d1d13aae237abcf8e66d33345d5.zip | |
net: Fix data-races around sysctl_mem.
While reading .sysctl_mem, it can be changed concurrently.
So, we need to add READ_ONCE() to avoid data-races.
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 'include/net/sock.h')
| -rw-r--r-- | include/net/sock.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/sock.h b/include/net/sock.h index 72ca97ccb460..9fa54762e077 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1529,7 +1529,7 @@ void __sk_mem_reclaim(struct sock *sk, int amount); /* sysctl_mem values are in pages, we convert them in SK_MEM_QUANTUM units */ static inline long sk_prot_mem_limits(const struct sock *sk, int index) { - long val = sk->sk_prot->sysctl_mem[index]; + long val = READ_ONCE(sk->sk_prot->sysctl_mem[index]); #if PAGE_SIZE > SK_MEM_QUANTUM val <<= PAGE_SHIFT - SK_MEM_QUANTUM_SHIFT; |