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author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-07 02:40:00 +0300 |
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committer | David S. Miller <davem@davemloft.net> | 2022-07-08 14:10:33 +0300 |
commit | 310731e2f1611d1d13aae237abcf8e66d33345d5 (patch) | |
tree | e5fdd4fa9b0ce21dd4d0ead99f7ea2754526c613 | |
parent | 3d32edf1f3c38d3301f6434e56316f293466d7fb (diff) | |
download | linux-310731e2f1611d1d13aae237abcf8e66d33345d5.tar.xz |
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>
-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; |