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test: Bump up runc to 9f9c96235cc97674e935002fc3d78361b696a69e

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This brings in a fix for a cgroups setup race condition
that we hit sometimes in the tests.

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>
This commit is contained in:
Mrunal Patel 2018-01-19 13:37:10 -08:00
parent 77561e95cf
commit 970b8d61a7
89 changed files with 3197 additions and 970 deletions
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138
vendor/github.com/opencontainers/runc/libcontainer/nsenter/nsexec.c generated vendored
View file

@ -1,3 +1,4 @@
#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
@ -19,6 +20,8 @@
#include <sys/prctl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <linux/limits.h>
#include <linux/netlink.h>
@ -64,7 +67,13 @@ struct clone_t {
struct nlconfig_t {
char *data;
/* Process settings. */
uint32_t cloneflags;
char *oom_score_adj;
size_t oom_score_adj_len;
/* User namespace settings.*/
char *uidmap;
size_t uidmap_len;
char *gidmap;
@ -72,9 +81,13 @@ struct nlconfig_t {
char *namespaces;
size_t namespaces_len;
uint8_t is_setgroup;
/* Rootless container settings.*/
uint8_t is_rootless;
char *oom_score_adj;
size_t oom_score_adj_len;
char *uidmappath;
size_t uidmappath_len;
char *gidmappath;
size_t gidmappath_len;
};
/*
@ -89,6 +102,8 @@ struct nlconfig_t {
#define SETGROUP_ATTR 27285
#define OOM_SCORE_ADJ_ATTR 27286
#define ROOTLESS_ATTR 27287
#define UIDMAPPATH_ATTR 27288
#define GIDMAPPATH_ATTR 27289
/*
* Use the raw syscall for versions of glibc which don't include a function for
@ -191,22 +206,96 @@ static void update_setgroups(int pid, enum policy_t setgroup)
}
}
static void update_uidmap(int pid, char *map, size_t map_len)
static int try_mapping_tool(const char *app, int pid, char *map, size_t map_len)
{
if (map == NULL || map_len <= 0)
return;
int child;
if (write_file(map, map_len, "/proc/%d/uid_map", pid) < 0)
bail("failed to update /proc/%d/uid_map", pid);
/*
* If @app is NULL, execve will segfault. Just check it here and bail (if
* we're in this path, the caller is already getting desparate and there
* isn't a backup to this failing). This usually would be a configuration
* or programming issue.
*/
if (!app)
bail("mapping tool not present");
child = fork();
if (child < 0)
bail("failed to fork");
if (!child) {
#define MAX_ARGV 20
char *argv[MAX_ARGV];
char *envp[] = {NULL};
char pid_fmt[16];
int argc = 0;
char *next;
snprintf(pid_fmt, 16, "%d", pid);
argv[argc++] = (char *) app;
argv[argc++] = pid_fmt;
/*
* Convert the map string into a list of argument that
* newuidmap/newgidmap can understand.
*/
while (argc < MAX_ARGV) {
if (*map == '\0') {
argv[argc++] = NULL;
break;
}
argv[argc++] = map;
next = strpbrk(map, "\n ");
if (next == NULL)
break;
*next++ = '\0';
map = next + strspn(next, "\n ");
}
execve(app, argv, envp);
bail("failed to execv");
} else {
int status;
while (true) {
if (waitpid(child, &status, 0) < 0) {
if (errno == EINTR)
continue;
bail("failed to waitpid");
}
if (WIFEXITED(status) || WIFSIGNALED(status))
return WEXITSTATUS(status);
}
}
return -1;
}
static void update_gidmap(int pid, char *map, size_t map_len)
static void update_uidmap(const char *path, int pid, char *map, size_t map_len)
{
if (map == NULL || map_len <= 0)
return;
if (write_file(map, map_len, "/proc/%d/gid_map", pid) < 0)
bail("failed to update /proc/%d/gid_map", pid);
if (write_file(map, map_len, "/proc/%d/uid_map", pid) < 0) {
if (errno != EPERM)
bail("failed to update /proc/%d/uid_map", pid);
if (try_mapping_tool(path, pid, map, map_len))
bail("failed to use newuid map on %d", pid);
}
}
static void update_gidmap(const char *path, int pid, char *map, size_t map_len)
{
if (map == NULL || map_len <= 0)
return;
if (write_file(map, map_len, "/proc/%d/gid_map", pid) < 0) {
if (errno != EPERM)
bail("failed to update /proc/%d/gid_map", pid);
if (try_mapping_tool(path, pid, map, map_len))
bail("failed to use newgid map on %d", pid);
}
}
static void update_oom_score_adj(char *data, size_t len)
@ -350,6 +439,14 @@ static void nl_parse(int fd, struct nlconfig_t *config)
config->gidmap = current;
config->gidmap_len = payload_len;
break;
case UIDMAPPATH_ATTR:
config->uidmappath = current;
config->uidmappath_len = payload_len;
break;
case GIDMAPPATH_ATTR:
config->gidmappath = current;
config->gidmappath_len = payload_len;
break;
case SETGROUP_ATTR:
config->is_setgroup = readint8(current);
break;
@ -542,7 +639,7 @@ void nsexec(void)
*/
case JUMP_PARENT: {
int len;
pid_t child;
pid_t child, first_child = -1;
char buf[JSON_MAX];
bool ready = false;
@ -596,8 +693,8 @@ void nsexec(void)
update_setgroups(child, SETGROUPS_DENY);
/* Set up mappings. */
update_uidmap(child, config.uidmap, config.uidmap_len);
update_gidmap(child, config.gidmap, config.gidmap_len);
update_uidmap(config.uidmappath, child, config.uidmap, config.uidmap_len);
update_gidmap(config.gidmappath, child, config.gidmap, config.gidmap_len);
s = SYNC_USERMAP_ACK;
if (write(syncfd, &s, sizeof(s)) != sizeof(s)) {
@ -606,18 +703,18 @@ void nsexec(void)
}
break;
case SYNC_RECVPID_PLS: {
pid_t old = child;
first_child = child;
/* Get the init_func pid. */
if (read(syncfd, &child, sizeof(child)) != sizeof(child)) {
kill(old, SIGKILL);
kill(first_child, SIGKILL);
bail("failed to sync with child: read(childpid)");
}
/* Send ACK. */
s = SYNC_RECVPID_ACK;
if (write(syncfd, &s, sizeof(s)) != sizeof(s)) {
kill(old, SIGKILL);
kill(first_child, SIGKILL);
kill(child, SIGKILL);
bail("failed to sync with child: write(SYNC_RECVPID_ACK)");
}
@ -665,8 +762,13 @@ void nsexec(void)
}
}
/* Send the init_func pid back to our parent. */
len = snprintf(buf, JSON_MAX, "{\"pid\": %d}\n", child);
/*
* Send the init_func pid and the pid of the first child back to our parent.
*
* We need to send both back because we can't reap the first child we created (CLONE_PARENT).
* It becomes the responsibility of our parent to reap the first child.
*/
len = snprintf(buf, JSON_MAX, "{\"pid\": %d, \"pid_first\": %d}\n", child, first_child);
if (len < 0) {
kill(child, SIGKILL);
bail("unable to generate JSON for child pid");