From: "Darrick J. Wong"
mainline inclusion
from mainline-v5.16-rc5
commit 983d8e60f50806f90534cc5373d0ce867e5aaf79
category: bugfix
issue: #I4RVJ4
CVE: CVE-2021-4155
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
Signed-off-by: Yu Changchun
--------------------------------
The old ALLOCSP/FREESP ioctls in XFS can be used to preallocate space at
the end of files, just like fallocate and RESVSP. Make the behavior
consistent with the other ioctls.
Reported-by: Kirill Tkhai
Signed-off-by: Darrick J. Wong
Signed-off-by: Darrick J. Wong
Reviewed-by: Dave Chinner
Reviewed-by: Eric Sandeen
Signed-off-by: Guo Xuenan
Reviewed-by: Zhang Yi
Reviewed-by: Xiu Jianfeng
Signed-off-by: Zheng Zengkai
Signed-off-by: Yu Changchun
---
fs/xfs/xfs_ioctl.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 3fbd98f61ea5..646735aad45d 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -686,7 +686,8 @@ xfs_ioc_space(
if (bf->l_start > XFS_ISIZE(ip)) {
error = xfs_alloc_file_space(ip, XFS_ISIZE(ip),
- bf->l_start - XFS_ISIZE(ip), 0);
+ bf->l_start - XFS_ISIZE(ip),
+ XFS_BMAPI_PREALLOC);
if (error)
goto out_unlock;
}
--
2.25.1
