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tap: fix memory leak on failure to create a multiqueue tap device

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Reported by Coverity.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Paolo Bonzini 2016-07-15 10:56:07 +02:00 committed by Jason Wang
parent 4555ca6816
commit 091a6b2acf
1 changed files with 16 additions and 6 deletions
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22
net/tap.c
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@ -787,8 +787,8 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
return -1;
}
} else if (tap->has_fds) {
char **fds = g_new(char *, MAX_TAP_QUEUES);
char **vhost_fds = g_new(char *, MAX_TAP_QUEUES);
char **fds = g_new0(char *, MAX_TAP_QUEUES);
char **vhost_fds = g_new0(char *, MAX_TAP_QUEUES);
int nfds, nvhosts;
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
@ -806,7 +806,7 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
if (nfds != nvhosts) {
error_setg(errp, "The number of fds passed does not match "
"the number of vhostfds passed");
return -1;
goto free_fail;
}
}
@ -814,7 +814,7 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
fd = monitor_fd_param(cur_mon, fds[i], &err);
if (fd == -1) {
error_propagate(errp, err);
return -1;
goto free_fail;
}
fcntl(fd, F_SETFL, O_NONBLOCK);
@ -824,7 +824,7 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
} else if (vnet_hdr != tap_probe_vnet_hdr(fd)) {
error_setg(errp,
"vnet_hdr not consistent across given tap fds");
return -1;
goto free_fail;
}
net_init_tap_one(tap, peer, "tap", name, ifname,
@ -833,11 +833,21 @@ int net_init_tap(const NetClientOptions *opts, const char *name,
vnet_hdr, fd, &err);
if (err) {
error_propagate(errp, err);
return -1;
goto free_fail;
}
}
g_free(fds);
g_free(vhost_fds);
return 0;
free_fail:
for (i = 0; i < nfds; i++) {
g_free(fds[i]);
g_free(vhost_fds[i]);
}
g_free(fds);
g_free(vhost_fds);
return -1;
} else if (tap->has_helper) {
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
tap->has_vnet_hdr || tap->has_queues || tap->has_vhostfds) {