From: Sasha Levin <sashal@kernel.org>
To: stable@vger.kernel.org
Cc: ChenXiaoSong <chenxiaosong@kylinos.cn>,
Steve French <stfrench@microsoft.com>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 6.1.y 1/3] smb/client: use stack-allocated smb2_file_all_info in smb3_query_mf_symlink()
Date: Wed, 30 Sep 2026 19:13:47 -0400 [thread overview]
Message-ID: <20260930231349.590269-1-sashal@kernel.org> (raw)
In-Reply-To: <2026092945-conclude-congrats-b326@gregkh>
From: ChenXiaoSong <chenxiaosong@kylinos.cn>
[ Upstream commit fc8789bb57e625e5f32ac57ca2e7d3e7b7fda225 ]
SMB2_open() only fills the fixed fields, so a stack-allocated
smb2_file_all_info is sufficient here.
Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: Steve French <stfrench@microsoft.com>
Stable-dep-of: 566820af017e ("smb: client: close handle after create-context parsing failure")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/smb/client/link.c | 15 +++------------
1 file changed, 3 insertions(+), 12 deletions(-)
diff --git a/fs/smb/client/link.c b/fs/smb/client/link.c
index d71feb3fdbd2c..ce76807cfe915 100644
--- a/fs/smb/client/link.c
+++ b/fs/smb/client/link.c
@@ -355,7 +355,7 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
int buf_type = CIFS_NO_BUFFER;
__le16 *utf16_path;
__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
- struct smb2_file_all_info *pfile_info = NULL;
+ struct smb2_file_all_info file_info = {};
oparms = (struct cifs_open_parms) {
.tcon = tcon,
@@ -371,20 +371,12 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
if (utf16_path == NULL)
return -ENOMEM;
- pfile_info = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
- GFP_KERNEL);
-
- if (pfile_info == NULL) {
- kfree(utf16_path);
- return -ENOMEM;
- }
-
- rc = SMB2_open(xid, &oparms, utf16_path, &oplock, pfile_info, NULL,
+ rc = SMB2_open(xid, &oparms, utf16_path, &oplock, &file_info, NULL,
NULL, NULL);
if (rc)
goto qmf_out_open_fail;
- if (pfile_info->EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
+ if (file_info.EndOfFile != cpu_to_le64(CIFS_MF_SYMLINK_FILE_SIZE)) {
/* it's not a symlink */
rc = -ENOENT; /* Is there a better rc to return? */
goto qmf_out;
@@ -402,7 +394,6 @@ smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
qmf_out_open_fail:
kfree(utf16_path);
- kfree(pfile_info);
return rc;
}
--
2.53.0
next prev parent reply other threads:[~2026-09-30 23:13 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-29 11:50 FAILED: patch "[PATCH] smb: client: close handle after create-context parsing" failed to apply to 6.1-stable tree gregkh
2026-09-30 23:13 ` Sasha Levin [this message]
2026-09-30 23:13 ` [PATCH 6.1.y 2/3] smb/client: pass cifs_open_info_data to SMB2_open() Sasha Levin
2026-09-30 23:13 ` [PATCH 6.1.y 3/3] smb: client: close handle after create-context parsing failure Sasha Levin
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