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| author | Kuniyuki Iwashima <kuniyu@amazon.com> | 2022-10-06 11:53:46 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2022-10-12 17:50:37 -0700 |
| commit | 21985f43376cee092702d6cb963ff97a9d2ede68 (patch) | |
| tree | 0084a093718e00e822b53495b5f506a2aee4ea15 /net/ipv6/af_inet6.c | |
| parent | 3c52c6bb831f6335c176a0fc7214e26f43adbd11 (diff) | |
| download | linux-riscv-21985f43376cee092702d6cb963ff97a9d2ede68.tar.gz linux-riscv-21985f43376cee092702d6cb963ff97a9d2ede68.tar.bz2 linux-riscv-21985f43376cee092702d6cb963ff97a9d2ede68.zip | |
udp: Call inet6_destroy_sock() in setsockopt(IPV6_ADDRFORM).
Commit 4b340ae20d0e ("IPv6: Complete IPV6_DONTFRAG support") forgot
to add a change to free inet6_sk(sk)->rxpmtu while converting an IPv6
socket into IPv4 with IPV6_ADDRFORM. After conversion, sk_prot is
changed to udp_prot and ->destroy() never cleans it up, resulting in
a memory leak.
This is due to the discrepancy between inet6_destroy_sock() and
IPV6_ADDRFORM, so let's call inet6_destroy_sock() from IPV6_ADDRFORM
to remove the difference.
However, this is not enough for now because rxpmtu can be changed
without lock_sock() after commit 03485f2adcde ("udpv6: Add lockless
sendmsg() support"). We will fix this case in the following patch.
Note we will rename inet6_destroy_sock() to inet6_cleanup_sock() and
remove unnecessary inet6_destroy_sock() calls in sk_prot->destroy()
in the future.
Fixes: 4b340ae20d0e ("IPv6: Complete IPV6_DONTFRAG support")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6/af_inet6.c')
| -rw-r--r-- | net/ipv6/af_inet6.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index d40b7d60e00e..ded827944fa6 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -510,6 +510,12 @@ void inet6_destroy_sock(struct sock *sk) } EXPORT_SYMBOL_GPL(inet6_destroy_sock); +void inet6_cleanup_sock(struct sock *sk) +{ + inet6_destroy_sock(sk); +} +EXPORT_SYMBOL_GPL(inet6_cleanup_sock); + /* * This does both peername and sockname. */ |