git: d6a4e4842943 - stable/14 - loader/libofw: Fix disk size truncation

The branch stable/14 has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=d6a4e4842943fb525061cfee34bc37a098cb7433

commit d6a4e4842943fb525061cfee34bc37a098cb7433
Author:     Justin Hibbits <jhibbits@FreeBSD.org>
AuthorDate: 2024-02-20 22:08:54 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2024-04-16 19:54:25 +0000

    loader/libofw: Fix disk size truncation
    
    At present OF_ioctl first multiplies, then casts to 64-bit, meaning at
    the asm level it truncates the result to 32-bit, then zero-extends it to
    64-bit to return.  Cast `n` to 64-bit before multiplying, so that the
    correct result is returned.
    
    (cherry picked from commit cd6e526e268e4fdf1c9a65b9d792e67343f52307)
---
 stand/libofw/ofw_disk.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/stand/libofw/ofw_disk.c b/stand/libofw/ofw_disk.c
index e9002ca23fe9..d30454b70b74 100644
--- a/stand/libofw/ofw_disk.c
+++ b/stand/libofw/ofw_disk.c
@@ -174,7 +174,7 @@ ofwd_ioctl(struct open_file *f, u_long cmd, void *data)
 	case DIOCGMEDIASIZE:
 		block_size = OF_block_size(dev->d_handle);
 		n = OF_blocks(dev->d_handle);
-		*(uint64_t *)data = (uint64_t)(n * block_size);
+		*(uint64_t *)data = ((uint64_t)n * block_size);
 		break;
 	default:
 		return (ENOTTY);