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linux/net/l2tp
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Eric Dumazet d2d08fc357 l2tp: do not use sock_hold() in pppol2tp_session_get_sock() 
[ Upstream commit 9b8c88f875 ]

pppol2tp_session_get_sock() is using RCU, it must be ready
for sk_refcnt being zero.

Commit ee40fb2e1e ("l2tp: protect sock pointer of
struct pppol2tp_session with RCU") was correct because it
had a call_rcu(..., pppol2tp_put_sk) which was later removed in blamed commit.

pppol2tp_recv() can use pppol2tp_session_get_sock() as well.

Fixes: c5cbaef992 ("l2tp: refactor ppp socket/session relationship")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: James Chapman <jchapman@katalix.com>
Reviewed-by: Guillaume Nault <gnault@redhat.com>
Link: https://patch.msgid.link/20250826134435.1683435-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-09-04 15:31:51 +02:00
..
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
l2tp_core.c net/l2tp: fix warning in l2tp_exit_net found by syzbot 2024-12-05 14:02:31 +01:00
l2tp_core.h l2tp: improve tunnel/session refcount helpers 2024-08-11 04:38:50 +01:00
l2tp_debugfs.c l2tp: improve tunnel/session refcount helpers 2024-08-11 04:38:50 +01:00
l2tp_eth.c netdev_features: convert NETIF_F_LLTX to dev->lltx 2024-09-03 11:36:43 +02:00
l2tp_ip.c l2tp: use skb_queue_purge in l2tp_ip_destroy_sock 2024-08-20 16:52:28 -07:00
l2tp_ip6.c ipv6: replace ipcm6_init calls with ipcm6_init_sk 2025-06-27 11:11:41 +01:00
l2tp_netlink.c genetlink: hold RCU in genlmsg_mcast() 2024-10-15 17:52:58 -07:00
l2tp_ppp.c l2tp: do not use sock_hold() in pppol2tp_session_get_sock() 2025-09-04 15:31:51 +02:00
Makefile l2tp: add tracepoint infrastructure to core 2020-08-22 12:44:37 -07:00
trace.h l2tp: add tracepoint definitions in trace.h 2020-08-22 12:44:37 -07:00