[PATCH AUTOSEL 5.4 245/350] selftests: proc: Make va_max 1MB

Sasha Levin
2019-12-10T21:12:00Z

From: Masami Hiramatsu <mhiramat@kernel.org>

[ Upstream commit 2f3571ea71311bbb2cbb9c3bbefc9c1969a3e889 ]

Currently proc-self-map-files-002.c sets va_max (max test address
of user virtual address) to 4GB, but it is too big for 32bit
arch and 1UL << 32 is overflow on 32bit long.
Also since this value should be enough bigger than vm.mmap_min_addr
(64KB or 32KB by default), 1MB should be enough.

Make va_max 1MB unconditionally.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/testing/selftests/proc/proc-self-map-files-002.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/proc/proc-self-map-files-002.c b/tools/testing/selftests/proc/proc-self-map-files-002.c
index 47b7473dedef7..e6aa00a183bcd 100644
--- a/tools/testing/selftests/proc/proc-self-map-files-002.c
+++ b/tools/testing/selftests/proc/proc-self-map-files-002.c
@@ -47,7 +47,11 @@ static void fail(const char *fmt, unsigned long a, unsigned long b)
int main(void)
{
const int PAGE_SIZE = sysconf(_SC_PAGESIZE);
- const unsigned long va_max = 1UL << 32;
+ /*
+ * va_max must be enough bigger than vm.mmap_min_addr, which is
+ * 64KB/32KB by default. (depends on CONFIG_LSM_MMAP_MIN_ADDR)
+ */
+ const unsigned long va_max = 1UL << 20;
unsigned long va;
void *p;
int fd;
--
2.20.1