From: Namjae Jeon <linkinjeon@kernel.org>
To: linux-cifs@vger.kernel.org
Cc: smfrench@gmail.com, senozhatsky@chromium.org, tom@talpey.com,
atteh.mailbox@gmail.com, Namjae Jeon <linkinjeon@kernel.org>
Subject: [PATCH] ksmbd: fix incorrect AllocationSize set in smb2_get_info
Date: Fri, 19 May 2023 23:15:08 +0900 [thread overview]
Message-ID: <20230519141508.12694-2-linkinjeon@kernel.org> (raw)
In-Reply-To: <20230519141508.12694-1-linkinjeon@kernel.org>
If filesystem support sparse file, ksmbd should return allocated size
using ->i_blocks instead of stat->size. This fix generic/694 xfstests.
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
---
fs/ksmbd/smb2pdu.c | 21 +++------------------
1 file changed, 3 insertions(+), 18 deletions(-)
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index a1939ff7c742..7a81541de602 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -4369,21 +4369,6 @@ static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
return 0;
}
-static unsigned long long get_allocation_size(struct inode *inode,
- struct kstat *stat)
-{
- unsigned long long alloc_size = 0;
-
- if (!S_ISDIR(stat->mode)) {
- if ((inode->i_blocks << 9) <= stat->size)
- alloc_size = stat->size;
- else
- alloc_size = inode->i_blocks << 9;
- }
-
- return alloc_size;
-}
-
static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
struct ksmbd_file *fp, void *rsp_org)
{
@@ -4398,7 +4383,7 @@ static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
delete_pending = ksmbd_inode_pending_delete(fp);
- sinfo->AllocationSize = cpu_to_le64(get_allocation_size(inode, &stat));
+ sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
sinfo->DeletePending = delete_pending;
@@ -4463,7 +4448,7 @@ static int get_file_all_info(struct ksmbd_work *work,
file_info->Attributes = fp->f_ci->m_fattr;
file_info->Pad1 = 0;
file_info->AllocationSize =
- cpu_to_le64(get_allocation_size(inode, &stat));
+ cpu_to_le64(inode->i_blocks << 9);
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->NumberOfLinks =
cpu_to_le32(get_nlink(&stat) - delete_pending);
@@ -4652,7 +4637,7 @@ static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
file_info->ChangeTime = cpu_to_le64(time);
file_info->Attributes = fp->f_ci->m_fattr;
file_info->AllocationSize =
- cpu_to_le64(get_allocation_size(inode, &stat));
+ cpu_to_le64(inode->i_blocks << 9);
file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
file_info->Reserved = cpu_to_le32(0);
rsp->OutputBufferLength =
--
2.25.1
prev parent reply other threads:[~2023-05-19 14:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-19 14:15 [PATCH] ksmbd: fix UAF issue from opinfo->conn Namjae Jeon
2023-05-19 14:15 ` Namjae Jeon [this message]
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