git: f8fa2f0e7577 - stable/13 - msdosfs: Fix mounting when the device sector size is >512B

From: Mark Johnston <markj_at_FreeBSD.org>
Date: Mon, 21 Feb 2022 14:58:12 UTC
The branch stable/13 has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=f8fa2f0e7577c5f1cd4239cf73f5e11dcefe61d0

commit f8fa2f0e7577c5f1cd4239cf73f5e11dcefe61d0
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2022-02-14 14:41:32 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2022-02-21 14:57:54 +0000

    msdosfs: Fix mounting when the device sector size is >512B
    
    HugeSectors * BytesPerSec should be computed before converting
    HugeSectors to a DEV_BSIZE-based count.
    
    Fixes:  ba2c98389b78 ("msdosfs: sanity check sector count from BPB")
    Reviewed by:    kib
    Sponsored by:   The FreeBSD Foundation
    
    (cherry picked from commit c7cd607a4e28233ab6679ee330c0a4836414bb0a)
---
 sys/fs/msdosfs/msdosfs_vfsops.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/fs/msdosfs/msdosfs_vfsops.c b/sys/fs/msdosfs/msdosfs_vfsops.c
index 6eab1685ec8e..cbfb0aead8b7 100644
--- a/sys/fs/msdosfs/msdosfs_vfsops.c
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c
@@ -577,7 +577,6 @@ mountmsdosfs(struct vnode *odevvp, struct mount *mp)
 		goto error_exit;
 	}
 
-	pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
 	if ((off_t)pmp->pm_HugeSectors * pmp->pm_BytesPerSec <
 	    pmp->pm_HugeSectors /* overflow */ ||
 	    (off_t)pmp->pm_HugeSectors * pmp->pm_BytesPerSec >
@@ -586,6 +585,7 @@ mountmsdosfs(struct vnode *odevvp, struct mount *mp)
 		goto error_exit;
 	}
 
+	pmp->pm_HugeSectors *= pmp->pm_BlkPerSec;
 	pmp->pm_HiddenSects *= pmp->pm_BlkPerSec;	/* XXX not used? */
 	pmp->pm_FATsecs     *= pmp->pm_BlkPerSec;
 	SecPerClust         *= pmp->pm_BlkPerSec;