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e6fbd1759c
This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy <reddybalavignesh9979@gmail.com> Suggested-by: Andrew Morton <akpm@linux-foundation.org> Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang <richard.weiyang@gmail.com> Cc: David Hildenbrand <david@redhat.com> Cc: David S. Miller <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Günther Noack <gnoack@google.com> Cc: Jakub Kacinski <kuba@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Mickael Salaun <mic@digikod.net> Cc: Ming Lei <ming.lei@redhat.com> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Simon Horman <horms@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2020 Bernd Edlinger <bernd.edlinger@hotmail.de>
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* All rights reserved.
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*
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* Check whether /proc/$pid/mem can be accessed without causing deadlocks
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* when de_thread is blocked with ->cred_guard_mutex held.
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*/
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#include "kselftest_harness.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/ptrace.h>
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static void *thread(void *arg)
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{
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ptrace(PTRACE_TRACEME, 0, 0L, 0L);
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return NULL;
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}
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TEST(vmaccess)
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{
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int f, pid = fork();
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char mm[64];
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if (!pid) {
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pthread_t pt;
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pthread_create(&pt, NULL, thread, NULL);
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pthread_join(pt, NULL);
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execlp("true", "true", NULL);
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}
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sleep(1);
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sprintf(mm, "/proc/%d/mem", pid);
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f = open(mm, O_RDONLY);
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ASSERT_GE(f, 0);
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close(f);
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f = kill(pid, SIGCONT);
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ASSERT_EQ(f, 0);
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}
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TEST(attach)
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{
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int s, k, pid = fork();
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if (!pid) {
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pthread_t pt;
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pthread_create(&pt, NULL, thread, NULL);
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pthread_join(pt, NULL);
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execlp("sleep", "sleep", "2", NULL);
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}
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sleep(1);
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k = ptrace(PTRACE_ATTACH, pid, 0L, 0L);
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ASSERT_EQ(errno, EAGAIN);
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ASSERT_EQ(k, -1);
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k = waitpid(-1, &s, WNOHANG);
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ASSERT_NE(k, -1);
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ASSERT_NE(k, 0);
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ASSERT_NE(k, pid);
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ASSERT_EQ(WIFEXITED(s), 1);
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ASSERT_EQ(WEXITSTATUS(s), 0);
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sleep(1);
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k = ptrace(PTRACE_ATTACH, pid, 0L, 0L);
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ASSERT_EQ(k, 0);
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k = waitpid(-1, &s, 0);
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ASSERT_EQ(k, pid);
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ASSERT_EQ(WIFSTOPPED(s), 1);
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ASSERT_EQ(WSTOPSIG(s), SIGSTOP);
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k = ptrace(PTRACE_DETACH, pid, 0L, 0L);
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ASSERT_EQ(k, 0);
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k = waitpid(-1, &s, 0);
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ASSERT_EQ(k, pid);
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ASSERT_EQ(WIFEXITED(s), 1);
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ASSERT_EQ(WEXITSTATUS(s), 0);
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k = waitpid(-1, NULL, 0);
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ASSERT_EQ(k, -1);
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ASSERT_EQ(errno, ECHILD);
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}
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TEST_HARNESS_MAIN
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