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8c2ab04135
Verify that ->setattr() on a pidfd doens't work. Link: https://lore.kernel.org/20250618-work-pidfs-persistent-v2-15-98f3456fd552@kernel.org Reviewed-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <linux/types.h>
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#include <poll.h>
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#include <pthread.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syscall.h>
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#include <sys/prctl.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <sys/socket.h>
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#include <linux/kcmp.h>
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#include <sys/stat.h>
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#include <sys/xattr.h>
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#include "pidfd.h"
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#include "../kselftest_harness.h"
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FIXTURE(pidfs_setattr)
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{
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pid_t child_pid;
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int child_pidfd;
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};
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FIXTURE_SETUP(pidfs_setattr)
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{
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self->child_pid = create_child(&self->child_pidfd, CLONE_NEWUSER | CLONE_NEWPID);
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EXPECT_GE(self->child_pid, 0);
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if (self->child_pid == 0)
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_exit(EXIT_SUCCESS);
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}
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FIXTURE_TEARDOWN(pidfs_setattr)
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{
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sys_waitid(P_PID, self->child_pid, NULL, WEXITED);
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EXPECT_EQ(close(self->child_pidfd), 0);
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}
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TEST_F(pidfs_setattr, no_chown)
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{
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ASSERT_LT(fchown(self->child_pidfd, 1234, 5678), 0);
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ASSERT_EQ(errno, EOPNOTSUPP);
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}
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TEST_F(pidfs_setattr, no_chmod)
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{
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ASSERT_LT(fchmod(self->child_pidfd, 0777), 0);
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ASSERT_EQ(errno, EOPNOTSUPP);
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}
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TEST_F(pidfs_setattr, no_exec)
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{
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char *const argv[] = { NULL };
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char *const envp[] = { NULL };
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ASSERT_LT(execveat(self->child_pidfd, "", argv, envp, AT_EMPTY_PATH), 0);
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ASSERT_EQ(errno, EACCES);
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}
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TEST_HARNESS_MAIN
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