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Fri, 24 Oct 2025 15:49:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id je+hOPqf+2gMEQAAD6G6ig (envelope-from ); Fri, 24 Oct 2025 15:49:14 +0000 From: Gabriel Krisman Bertazi To: Jens Axboe Cc: Gabriel Krisman Bertazi , netdev@vger.kernel.org, io-uring@vger.kernel.org, Jakub Kicinski , "David S . Miller" , Eric Dumazet Subject: [PATCH 2/3] socket: Split out a getsockname helper for io_uring Date: Fri, 24 Oct 2025 11:48:59 -0400 Message-ID: <20251024154901.797262-3-krisman@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251024154901.797262-1-krisman@suse.de> References: <20251024154901.797262-1-krisman@suse.de> Precedence: bulk X-Mailing-List: io-uring@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Level: X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; TO_MATCH_ENVRCPT_ALL(0.00)[]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; FROM_HAS_DN(0.00)[]; MIME_TRACE(0.00)[0:+]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCPT_COUNT_SEVEN(0.00)[7]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_DN_SOME(0.00)[]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO X-Spam-Score: -2.80 Similar to getsockopt, split out a helper to check security and issue the operation from the main handler that can be used by io_uring. Signed-off-by: Gabriel Krisman Bertazi --- include/linux/socket.h | 2 ++ net/socket.c | 34 +++++++++++++++++++--------------- 2 files changed, 21 insertions(+), 15 deletions(-) diff --git a/include/linux/socket.h b/include/linux/socket.h index 937fe331ff1e..5afb5ef2990c 100644 --- a/include/linux/socket.h +++ b/include/linux/socket.h @@ -453,6 +453,8 @@ extern int __sys_connect(int fd, struct sockaddr __user *uservaddr, int addrlen); extern int __sys_listen(int fd, int backlog); extern int __sys_listen_socket(struct socket *sock, int backlog); +extern int do_getsockname(struct socket *sock, struct sockaddr_storage *address, + int peer, struct sockaddr __user *usockaddr, int __user *usockaddr_len); extern int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, int __user *usockaddr_len, int peer); extern int __sys_socketpair(int family, int type, int protocol, diff --git a/net/socket.c b/net/socket.c index ee438b9425da..9c110b529cdd 100644 --- a/net/socket.c +++ b/net/socket.c @@ -2127,6 +2127,24 @@ SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, return __sys_connect(fd, uservaddr, addrlen); } +int do_getsockname(struct socket *sock, struct sockaddr_storage *address, int peer, + struct sockaddr __user *usockaddr, int __user *usockaddr_len) +{ + int err; + + if (peer) + err = security_socket_getpeername(sock); + else + err = security_socket_getsockname(sock); + if (err) + return err; + err = READ_ONCE(sock->ops)->getname(sock, (struct sockaddr *)address, peer); + if (err < 0) + return err; + /* "err" is actually length in this case */ + return move_addr_to_user(address, err, usockaddr, usockaddr_len); +} + /* * Get the address (remote or local ('name')) of a socket object. Move the * obtained name to user space. @@ -2137,27 +2155,13 @@ int __sys_getsockname(int fd, struct sockaddr __user *usockaddr, struct socket *sock; struct sockaddr_storage address; CLASS(fd, f)(fd); - int err; if (fd_empty(f)) return -EBADF; sock = sock_from_file(fd_file(f)); if (unlikely(!sock)) return -ENOTSOCK; - - if (peer) - err = security_socket_getpeername(sock); - else - err = security_socket_getsockname(sock); - if (err) - return err; - - err = READ_ONCE(sock->ops)->getname(sock, (struct sockaddr *)&address, peer); - if (err < 0) - return err; - - /* "err" is actually length in this case */ - return move_addr_to_user(&address, err, usockaddr, usockaddr_len); + return do_getsockname(sock, &address, peer, usockaddr, usockaddr_len); } SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, -- 2.51.0