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contrib/plugins: fix coverity warning in lockstep 

Coverity complains that e don't check for a truncation when copying in
the path. Bail if we can't copy the whole path into sockaddr.

Fixes: CID 1519045
Fixes: CID 1519046
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20231009164104.369749-25-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2023-10-09 17:41:03 +01:00
parent 60cb16c0d8
commit ec7ee95db9
1 changed files with 11 additions and 2 deletions
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13
contrib/plugins/lockstep.c
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@ -245,6 +245,7 @@ static void vcpu_tb_trans(qemu_plugin_id_t id, struct qemu_plugin_tb *tb)
static bool setup_socket(const char *path)
{
struct sockaddr_un sockaddr;
const gsize pathlen = sizeof(sockaddr.sun_path) - 1;
int fd;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
@ -254,7 +255,11 @@ static bool setup_socket(const char *path)
}
sockaddr.sun_family = AF_UNIX;
g_strlcpy(sockaddr.sun_path, path, sizeof(sockaddr.sun_path) - 1);
if (g_strlcpy(sockaddr.sun_path, path, pathlen) >= pathlen) {
perror("bad path");
return false;
}
if (bind(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0) {
perror("bind socket");
close(fd);
@ -287,6 +292,7 @@ static bool connect_socket(const char *path)
{
int fd;
struct sockaddr_un sockaddr;
const gsize pathlen = sizeof(sockaddr.sun_path) - 1;
fd = socket(AF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
@ -295,7 +301,10 @@ static bool connect_socket(const char *path)
}
sockaddr.sun_family = AF_UNIX;
g_strlcpy(sockaddr.sun_path, path, sizeof(sockaddr.sun_path) - 1);
if (g_strlcpy(sockaddr.sun_path, path, pathlen) >= pathlen) {
perror("bad path");
return false;
}
if (connect(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) < 0) {
perror("failed to connect");