linux/net/llc
Shuangpeng Bai 660667cd40 llc: fix SAP refcount leak in llc_ui_autobind()
llc_ui_autobind() opens a SAP after choosing a dynamic LSAP.
llc_sap_open() returns a reference owned by the caller, and
llc_sap_add_socket() takes a second reference for the socket's
membership in the SAP hash tables.

llc_ui_bind() drops the caller's reference after adding the socket,
but llc_ui_autobind() keeps it. When the socket is closed,
llc_sap_remove_socket() releases only the socket reference, leaving
the SAP on llc_sap_list with sk_count == 0.

This is user-visible because repeated autobind and close cycles can consume
all dynamic SAP values and make later autobinds fail with -EUSERS.

Drop the caller's reference after a successful autobind, matching
llc_ui_bind()'s ownership model.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Shuangpeng Bai <shuangpeng.kernel@gmail.com>
Link: https://patch.msgid.link/20260630194856.1036497-1-shuangpeng.kernel@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-07-05 09:05:14 +02:00
..
af_llc.c llc: fix SAP refcount leak in llc_ui_autobind() 2026-07-05 09:05:14 +02:00
Kconfig net: remove redundant 'depends on NET' 2021-01-27 17:04:12 -08:00
llc_c_ac.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_c_ev.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_c_st.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_conn.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_core.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_if.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_input.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_output.c llc/snap: constify dev_addr passing 2021-10-13 09:40:46 -07:00
llc_pdu.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_proc.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_s_ac.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_s_ev.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_s_st.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_sap.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
llc_station.c llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
Makefile llc: Add SPDX id lines to some llc source files 2026-05-26 17:26:57 -07:00
sysctl_net_llc.c net: llc: make empty have static storage duration 2026-06-18 17:52:56 -07:00