From: Namjae Jeon linkinjeon@kernel.org
[ Upstream commit 6fc0a265e1b932e5e97a038f99e29400a93baad0 ]
smb2_set_ea() can be called in parent inode lock range. So add get_write argument to smb2_set_ea() not to call nested mnt_want_write().
Signed-off-by: Namjae Jeon linkinjeon@kernel.org Signed-off-by: Steve French stfrench@microsoft.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/smb/server/smb2pdu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 6e5ed0ac578a..8d4e2c666c34 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -2309,11 +2309,12 @@ static noinline int create_smb2_pipe(struct ksmbd_work *work) * @eabuf: set info command buffer * @buf_len: set info command buffer length * @path: dentry path for get ea + * @get_write: get write access to a mount * * Return: 0 on success, otherwise error */ static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, - const struct path *path) + const struct path *path, bool get_write) { struct user_namespace *user_ns = mnt_user_ns(path->mnt); char *attr_name = NULL, *value; @@ -3001,7 +3002,7 @@ int smb2_open(struct ksmbd_work *work)
rc = smb2_set_ea(&ea_buf->ea, le32_to_cpu(ea_buf->ccontext.DataLength), - &path); + &path, false); if (rc == -EOPNOTSUPP) rc = 0; else if (rc) @@ -5990,7 +5991,7 @@ static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, return -EINVAL;
return smb2_set_ea((struct smb2_ea_info *)req->Buffer, - buf_len, &fp->filp->f_path); + buf_len, &fp->filp->f_path, true); } case FILE_POSITION_INFORMATION: {