File xsa443-02.patch of Package xen.36362

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File xsa443-02.patch of Package xen.36362

From f75b0a70da392672fb7d9feed2a9e9515d74df2c Mon Sep 17 00:00:00 2001
From: Alejandro Vallejo <alejandro.vallejo@cloud.com>
Date: Thu, 14 Sep 2023 13:22:51 +0100
Subject: [PATCH 02/11] libfsimage/xfs: Amend mask32lo() to allow the value 32

agblklog could plausibly be 32, but that would overflow this shift.
Perform the shift as ULL and cast to u32 at the end instead.

This is part of XSA-443 / CVE-2023-34325

Signed-off-by: Alejandro Vallejo <alejandro.vallejo@cloud.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
---
 tools/libfsimage/xfs/fsys_xfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/libfsimage/xfs/fsys_xfs.c b/tools/libfsimage/xfs/fsys_xfs.c
index 2800699f5985..4720bb4505c8 100644
--- a/tools/libfsimage/xfs/fsys_xfs.c
+++ b/tools/libfsimage/xfs/fsys_xfs.c
@@ -60,7 +60,7 @@ static struct xfs_info xfs;
 #define inode		((xfs_dinode_t *)((char *)FSYS_BUF + 8192))
 #define icore		(inode->di_core)
 
-#define	mask32lo(n)	(((xfs_uint32_t)1 << (n)) - 1)
+#define	mask32lo(n)	((xfs_uint32_t)((1ull << (n)) - 1))
 
 #define	XFS_INO_MASK(k)		((xfs_uint32_t)((1ULL << (k)) - 1))
 #define	XFS_INO_OFFSET_BITS	xfs.inopblog
-- 
2.42.0

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File xsa443-02.patch of Package xen.36362

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