[LTP] [PATCH v2] ioctl_pidfd02.c: fix clone3 EFAULT in 32-bit compat mode due to sign extension

[Wei Gao]

Correct the 32-bit pointer u64 conversion for args->pidfd. Direct
casting from a 32-bit pointer to a 64-bit integer was causing incorrect
sign-extension. Using (uint64_t)(uintptr_t) ensures a valid zero-padded
64-bit address.

Signed-off-by: Wei Gao <wegao@suse.com>
---
 include/tst_common.h                            | 5 +++++
 testcases/kernel/syscalls/ioctl/ioctl_pidfd02.c | 2 +-
 testcases/kernel/syscalls/ioctl/ioctl_pidfd03.c | 2 +-
 testcases/kernel/syscalls/ioctl/ioctl_pidfd04.c | 2 +-
 testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c | 2 +-
 testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c | 2 +-
 6 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/include/tst_common.h b/include/tst_common.h
index 473228149..430c5e171 100644
--- a/include/tst_common.h
+++ b/include/tst_common.h
@@ -86,4 +86,9 @@
 #define TST_TO_STR_(s) #s
 #define TST_TO_STR(s) TST_TO_STR_(s)
 
+/*
+ * TST_PTR_TO_UINT - Casts a pointer to a 64-bit unsigned integer.
+ */
+#define TST_PTR_TO_UINT(x) ((uint64_t)(uintptr_t)(x))
+
 #endif /* TST_COMMON_H__ */
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd02.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd02.c
index c6f8a02fe..01f9df2b1 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd02.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd02.c
@@ -27,7 +27,7 @@ static void run(unsigned int isolate)
 
 	if (isolate) {
 		args->flags = CLONE_PIDFD | CLONE_NEWUSER | CLONE_NEWPID;
-		args->pidfd = (uint64_t)&pidfd;
+		args->pidfd = TST_PTR_TO_UINT(&pidfd);
 		args->exit_signal = SIGCHLD;
 
 		pid_child = SAFE_CLONE(args);
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd03.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd03.c
index 2c785004c..1ae467ad0 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd03.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd03.c
@@ -24,7 +24,7 @@ static void run(void)
 	memset(args, 0, sizeof(struct tst_clone_args));
 
 	args->flags = CLONE_PIDFD | CLONE_NEWUSER | CLONE_NEWPID;
-	args->pidfd = (uint64_t)&pidfd;
+	args->pidfd = TST_PTR_TO_UINT(&pidfd);
 	args->exit_signal = SIGCHLD;
 
 	pid_child = SAFE_CLONE(args);
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd04.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd04.c
index ff4316068..3d5566ea8 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd04.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd04.c
@@ -26,7 +26,7 @@ static void run(void)
 	info->mask = PIDFD_INFO_EXIT;
 
 	args->flags = CLONE_PIDFD | CLONE_NEWUSER | CLONE_NEWPID;
-	args->pidfd = (uint64_t)&pidfd;
+	args->pidfd = TST_PTR_TO_UINT(&pidfd);
 	args->exit_signal = SIGCHLD;
 
 	pid_child = SAFE_CLONE(args);
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c
index 278e64cef..aa69d20fa 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd05.c
@@ -36,7 +36,7 @@ static void run(void)
 	info_invalid->dummy = 1;
 
 	args->flags = CLONE_PIDFD | CLONE_NEWUSER | CLONE_NEWPID;
-	args->pidfd = (uint64_t)&pidfd;
+	args->pidfd = TST_PTR_TO_UINT(&pidfd);
 	args->exit_signal = SIGCHLD;
 
 	pid_child = SAFE_CLONE(args);
diff --git a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
index 95c09dbda..32ca0422b 100644
--- a/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
+++ b/testcases/kernel/syscalls/ioctl/ioctl_pidfd06.c
@@ -26,7 +26,7 @@ static void run(void)
 	info->mask = PIDFD_INFO_EXIT;
 
 	args->flags = CLONE_PIDFD | CLONE_NEWUSER | CLONE_NEWPID;
-	args->pidfd = (uint64_t)&pidfd;
+	args->pidfd = TST_PTR_TO_UINT(&pidfd);
 	args->exit_signal = SIGCHLD;
 
 	pid_child = SAFE_CLONE(args);
-- 
2.52.0