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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-07-06 16:40:00 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-21 21:09:27 +0200 |
| commit | 2934b8b53d899924f30c51372dfd39b1da9be6b1 (patch) | |
| tree | 772ee8a20e12d7b98b45ea90f037ef90ef453957 /include/net | |
| parent | b5a8ebbc11df5047f9bef7bf6edb9d02f7d9baff (diff) | |
| download | linux-stable-2934b8b53d899924f30c51372dfd39b1da9be6b1.tar.gz linux-stable-2934b8b53d899924f30c51372dfd39b1da9be6b1.tar.bz2 linux-stable-2934b8b53d899924f30c51372dfd39b1da9be6b1.zip | |
net: Fix data-races around sysctl_mem.
[ Upstream commit 310731e2f1611d1d13aae237abcf8e66d33345d5 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/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 7d3a4c2eea95..98946f90781d 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1381,7 +1381,7 @@ 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; |