[Mesa-dev] [PATCH 1/3] gallium/os: Fix overflow on 32 bits

[Axel Davy]

On systems with more than 4GB of ram,
os_get_total_physical_memory was triggering an integer
overflow for the linux and haiku path, when on
32 bits.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=94561

Signed-off-by: Axel Davy <axel.davy at ens.fr>
---
 src/gallium/auxiliary/os/os_misc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/gallium/auxiliary/os/os_misc.c b/src/gallium/auxiliary/os/os_misc.c
index 82e4957..5e2bedc 100644
--- a/src/gallium/auxiliary/os/os_misc.c
+++ b/src/gallium/auxiliary/os/os_misc.c
@@ -128,7 +128,7 @@ os_get_total_physical_memory(uint64_t *size)
    const long phys_pages = sysconf(_SC_PHYS_PAGES);
    const long page_size = sysconf(_SC_PAGE_SIZE);
 
-   *size = phys_pages * page_size;
+   *size = (int64_t)phys_pages * (int64_t)page_size;
    return (phys_pages > 0 && page_size > 0);
 #elif defined(PIPE_OS_APPLE) || defined(PIPE_OS_BSD)
    size_t len = sizeof(*size);
@@ -153,7 +153,7 @@ os_get_total_physical_memory(uint64_t *size)
    status_t ret;
 
    ret = get_system_info(&info);
-   *size = info.max_pages * B_PAGE_SIZE;
+   *size = (int64_t)info.max_pages * (int64_t)B_PAGE_SIZE;
    return (ret == B_OK);
 #elif defined(PIPE_OS_WINDOWS)
    MEMORYSTATUSEX status;
-- 
2.10.0