technocloud-public/nginx-unit
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Fixing possible NULL dereference.

Browse Source 
For listen socket request reply port can be NULL if Router crashes immediately
after issuing the request.

Found by Coverity (CID 366310).
This commit is contained in:
Max Romanov
2021-02-03 23:23:17 +03:00
parent 8c88537e6e
commit b1685dbc76
1 changed files with 12 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
src/nxt_main_process.c
View File

@@ -1001,21 +1001,22 @@ nxt_main_port_socket_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
nxt_listening_socket_t ls;
u_char message[2048];
port = nxt_runtime_port_find(task->thread->runtime, msg->port_msg.pid,
msg->port_msg.reply_port);
if (nxt_slow_path(port == NULL)) {
return;
}
b = msg->buf;
sa = (nxt_sockaddr_t *) b->mem.pos;
/* TODO check b size and make plain */
out = NULL;
ls.socket = -1;
ls.error = NXT_SOCKET_ERROR_SYSTEM;
ls.start = message;
ls.end = message + sizeof(message);
port = nxt_runtime_port_find(task->thread->runtime, msg->port_msg.pid,
msg->port_msg.reply_port);
nxt_debug(task, "listening socket \"%*s\"",
(size_t) sa->length, nxt_sockaddr_start(sa));
@@ -1025,6 +1026,8 @@ nxt_main_port_socket_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
nxt_debug(task, "socket(\"%*s\"): %d",
(size_t) sa->length, nxt_sockaddr_start(sa), ls.socket);
out = NULL;
type = NXT_PORT_MSG_RPC_READY_LAST | NXT_PORT_MSG_CLOSE_FD;
} else {
@@ -1034,13 +1037,11 @@ nxt_main_port_socket_handler(nxt_task_t *task, nxt_port_recv_msg_t *msg)
out = nxt_buf_mem_ts_alloc(task, task->thread->engine->mem_pool,
size + 1);
if (nxt_slow_path(out == NULL)) {
return;
}
if (nxt_fast_path(out != NULL)) {
*out->mem.free++ = (uint8_t) ls.error;
out->mem.free = nxt_cpymem(out->mem.free, ls.start, size);
}
type = NXT_PORT_MSG_RPC_ERROR;
}