From f16fe3ecde6237256eeacb3cd582217ffe62c647 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Tue, 2 Jul 2019 09:39:39 -0700
Subject: [PATCH] xfs: bulkstat should copy lastip whenever userspace supplies
one
Git-commit: f16fe3ecde6237256eeacb3cd582217ffe62c647
Patch-mainline: v5.3-rc1
References: bsc#1165984
When userspace passes in a @lastip pointer we should copy the results
back, even if the @ocount pointer is NULL.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Acked-by: Anthony Iliopoulos <ailiopoulos@suse.com>
---
fs/xfs/xfs_ioctl.c | 13 ++++++-------
fs/xfs/xfs_ioctl32.c | 13 ++++++-------
2 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 7f1732ad6c40..8bc74ae3b72a 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -759,14 +759,13 @@ xfs_ioc_bulkstat(
if (error)
return error;
- if (bulkreq.ocount != NULL) {
- if (copy_to_user(bulkreq.lastip, &inlast,
- sizeof(xfs_ino_t)))
- return -EFAULT;
+ if (bulkreq.lastip != NULL &&
+ copy_to_user(bulkreq.lastip, &inlast, sizeof(xfs_ino_t)))
+ return -EFAULT;
- if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
- return -EFAULT;
- }
+ if (bulkreq.ocount != NULL &&
+ copy_to_user(bulkreq.ocount, &count, sizeof(count)))
+ return -EFAULT;
return 0;
}
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index d1967fe67472..3c3fb16685b1 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -305,14 +305,13 @@ xfs_compat_ioc_bulkstat(
if (error)
return error;
- if (bulkreq.ocount != NULL) {
- if (copy_to_user(bulkreq.lastip, &inlast,
- sizeof(xfs_ino_t)))
- return -EFAULT;
+ if (bulkreq.lastip != NULL &&
+ copy_to_user(bulkreq.lastip, &inlast, sizeof(xfs_ino_t)))
+ return -EFAULT;
- if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
- return -EFAULT;
- }
+ if (bulkreq.ocount != NULL &&
+ copy_to_user(bulkreq.ocount, &count, sizeof(count)))
+ return -EFAULT;
return 0;
}
--
2.16.4