From: Alexander Aring <aahringo@xxxxxxxxxx>
commit c51c9cd8addcfbdc097dbefd59f022402183644b upstream
This patch removes to allocate the dlm_local_addr[] pointers on the
heap. Instead we directly store the type of "struct sockaddr_storage".
This removes function deinit_local() because it was freeing memory only.
Backport e11dea8 ("dlm: use kernel_connect() and kernel_bind()") to
Linux stable 6.1 caused a regression. The original patch expected
dlm_local_addrs[0] to be of type sockaddr_storage, because c51c9cd ("fs:
dlm: don't put dlm_local_addrs on heap") changed its type from
sockaddr_storage* to sockaddr_storage in Linux 6.5+ while in older Linux
versions this is still the original sockaddr_storage*.
Signed-off-by: Alexander Aring <aahringo@xxxxxxxxxx>
Signed-off-by: David Teigland <teigland@xxxxxxxxxx>
Signed-off-by: Jordan Rife <jrife@xxxxxxxxxx>
Tested-by: Valentin Kleibel <valentin@xxxxxxxx>
Fixes: e11dea8f5033 ("dlm: use kernel_connect() and kernel_bind()")
Closes: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1063338
Link: https://lore.kernel.org/stable/20240209162658.70763-2-jrife@xxxxxxxxxx/T/#u
Cc: <stable@xxxxxxxxxxxxxxx> # 6.1.x
---
fs/dlm/lowcomms.c | 36 +++++++++++-------------------------
1 file changed, 11 insertions(+), 25 deletions(-)
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 72f34f96d0155..e26af8c23aa80 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -174,7 +174,7 @@ static LIST_HEAD(dlm_node_addrs);
static DEFINE_SPINLOCK(dlm_node_addrs_spin);
static struct listen_connection listen_con;
-static struct sockaddr_storage *dlm_local_addr[DLM_MAX_ADDR_COUNT];
+static struct sockaddr_storage dlm_local_addr[DLM_MAX_ADDR_COUNT];
static int dlm_local_count;
int dlm_allow_conn;
@@ -398,7 +398,7 @@ static int nodeid_to_addr(int nodeid, struct sockaddr_storage *sas_out,
if (!sa_out)
return 0;
- if (dlm_local_addr[0]->ss_family == AF_INET) {
+ if (dlm_local_addr[0].ss_family == AF_INET) {
struct sockaddr_in *in4 = (struct sockaddr_in *) &sas;
struct sockaddr_in *ret4 = (struct sockaddr_in *) sa_out;
ret4->sin_addr.s_addr = in4->sin_addr.s_addr;
@@ -727,7 +727,7 @@ static void add_sock(struct socket *sock, struct connection *con)
static void make_sockaddr(struct sockaddr_storage *saddr, uint16_t port,
int *addr_len)
{
- saddr->ss_family = dlm_local_addr[0]->ss_family;
+ saddr->ss_family = dlm_local_addr[0].ss_family;
if (saddr->ss_family == AF_INET) {
struct sockaddr_in *in4_addr = (struct sockaddr_in *)saddr;
in4_addr->sin_port = cpu_to_be16(port);
@@ -1167,7 +1167,7 @@ static int sctp_bind_addrs(struct socket *sock, uint16_t port)
int i, addr_len, result = 0;
for (i = 0; i < dlm_local_count; i++) {
- memcpy(&localaddr, dlm_local_addr[i], sizeof(localaddr));
+ memcpy(&localaddr, &dlm_local_addr[i], sizeof(localaddr));
make_sockaddr(&localaddr, port, &addr_len);
if (!i)
@@ -1187,7 +1187,7 @@ static int sctp_bind_addrs(struct socket *sock, uint16_t port)
/* Get local addresses */
static void init_local(void)
{
- struct sockaddr_storage sas, *addr;
+ struct sockaddr_storage sas;
int i;
dlm_local_count = 0;
@@ -1195,21 +1195,10 @@ static void init_local(void)
if (dlm_our_addr(&sas, i))
break;
- addr = kmemdup(&sas, sizeof(*addr), GFP_NOFS);
- if (!addr)
- break;
- dlm_local_addr[dlm_local_count++] = addr;
+ memcpy(&dlm_local_addr[dlm_local_count++], &sas, sizeof(sas));
}
}
-static void deinit_local(void)
-{
- int i;
-
- for (i = 0; i < dlm_local_count; i++)
- kfree(dlm_local_addr[i]);
-}
-
static struct writequeue_entry *new_writequeue_entry(struct connection *con)
{
struct writequeue_entry *entry;
@@ -1575,7 +1564,7 @@ static void dlm_connect(struct connection *con)
}
/* Create a socket to communicate with */
- result = sock_create_kern(&init_net, dlm_local_addr[0]->ss_family,
+ result = sock_create_kern(&init_net, dlm_local_addr[0].ss_family,
SOCK_STREAM, dlm_proto_ops->proto, &sock);
if (result < 0)
goto socket_err;
@@ -1786,7 +1775,6 @@ void dlm_lowcomms_stop(void)
foreach_conn(free_conn);
srcu_read_unlock(&connections_srcu, idx);
work_stop();
- deinit_local();
dlm_proto_ops = NULL;
}
@@ -1803,7 +1791,7 @@ static int dlm_listen_for_all(void)
if (result < 0)
return result;
- result = sock_create_kern(&init_net, dlm_local_addr[0]->ss_family,
+ result = sock_create_kern(&init_net, dlm_local_addr[0].ss_family,
SOCK_STREAM, dlm_proto_ops->proto, &sock);
if (result < 0) {
log_print("Can't create comms socket: %d", result);
@@ -1842,7 +1830,7 @@ static int dlm_tcp_bind(struct socket *sock)
/* Bind to our cluster-known address connecting to avoid
* routing problems.
*/
- memcpy(&src_addr, dlm_local_addr[0], sizeof(src_addr));
+ memcpy(&src_addr, &dlm_local_addr[0], sizeof(src_addr));
make_sockaddr(&src_addr, 0, &addr_len);
result = kernel_bind(sock, (struct sockaddr *)&src_addr,
@@ -1899,7 +1887,7 @@ static int dlm_tcp_listen_bind(struct socket *sock)
int addr_len;
/* Bind to our port */
- make_sockaddr(dlm_local_addr[0], dlm_config.ci_tcp_port, &addr_len);
+ make_sockaddr(&dlm_local_addr[0], dlm_config.ci_tcp_port, &addr_len);
return kernel_bind(sock, (struct sockaddr *)&dlm_local_addr[0],
addr_len);
}
@@ -1992,7 +1980,7 @@ int dlm_lowcomms_start(void)
error = work_start();
if (error)
- goto fail_local;
+ goto fail;
dlm_allow_conn = 1;
@@ -2022,8 +2010,6 @@ int dlm_lowcomms_start(void)
fail_proto_ops:
dlm_allow_conn = 0;
work_stop();
-fail_local:
- deinit_local();
fail:
return error;
}
--
2.43.0.687.g38aa6559b0-goog
