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Merge tag 'threads-v5.7' of git://git.kernel.org/pub/scm/linux/kernel…
…/git/brauner/linux Pull thread updates from Christian Brauner: "The main change for this cycle was the extension for clone3() to support spawning processes directly into cgroups via CLONE_INTO_CGROUP (commit ef2c41c: "clone3: allow spawning processes into cgroups"). But since I had to touch kernel/cgroup/ quite a bit I had Tejun route that through his tree this time around to make it easier for him to handle other changes. So here is just the unexciting leftovers: a regression test for the ENOMEM regression we fixed in commit b26ebfe ("pid: Fix error return value in some cases") verifying that we report ENOMEM when trying to create a new process in a pid namespace whose init process/subreaper has already exited" * tag 'threads-v5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux: selftests: add pid namespace ENOMEM regression test
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regression_enomem |
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# SPDX-License-Identifier: GPL-2.0 | ||
CFLAGS += -g -I../../../../usr/include/ | ||
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TEST_GEN_PROGS := regression_enomem | ||
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include ../lib.mk | ||
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$(OUTPUT)/regression_enomem: regression_enomem.c ../pidfd/pidfd.h |
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CONFIG_PID_NS=y | ||
CONFIG_USER_NS=y |
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#define _GNU_SOURCE | ||
#include <assert.h> | ||
#include <errno.h> | ||
#include <fcntl.h> | ||
#include <linux/types.h> | ||
#include <sched.h> | ||
#include <signal.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
#include <syscall.h> | ||
#include <sys/wait.h> | ||
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#include "../kselftest.h" | ||
#include "../kselftest_harness.h" | ||
#include "../pidfd/pidfd.h" | ||
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/* | ||
* Regression test for: | ||
* 35f71bc0a09a ("fork: report pid reservation failure properly") | ||
* b26ebfe12f34 ("pid: Fix error return value in some cases") | ||
*/ | ||
TEST(regression_enomem) | ||
{ | ||
pid_t pid; | ||
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if (geteuid()) | ||
EXPECT_EQ(0, unshare(CLONE_NEWUSER)); | ||
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EXPECT_EQ(0, unshare(CLONE_NEWPID)); | ||
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pid = fork(); | ||
ASSERT_GE(pid, 0); | ||
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if (pid == 0) | ||
exit(EXIT_SUCCESS); | ||
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EXPECT_EQ(0, wait_for_pid(pid)); | ||
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pid = fork(); | ||
ASSERT_LT(pid, 0); | ||
ASSERT_EQ(errno, ENOMEM); | ||
} | ||
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TEST_HARNESS_MAIN |
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