Description
In the Linux kernel, the following vulnerability has been resolved: l2tp: close all race conditions in l2tp_tunnel_register() The code in l2tp_tunnel_register() is racy in several ways: 1. It modifies the tunnel socket _after_ publishing it. 2. It calls setup_udp_tunnel_sock() on an existing socket without locking. 3. It changes sock lock class on fly, which triggers many syzbot reports. This patch amends all of them by moving socket initialization code before publishing and under sock lock. As suggested by Jakub, the l2tp lockdep class is not necessary as we can just switch to bh_lock_sock_nested().
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
37159ef2c1ae1e696b24b260b241209a19f92c60 to < 2d77e5c0ad79004b5ef901895437e9cce6dfcc7eaffected37159ef2c1ae1e696b24b260b241209a19f92c60 to < 77e8ed776cdb1a24b2aab8fe7c6f1f154235e1ceaffected37159ef2c1ae1e696b24b260b241209a19f92c60 to < cef0845b6dcfa2f6c2c832e7f9622551456c741daffected37159ef2c1ae1e696b24b260b241209a19f92c60 to < 0b2c59720e65885a394a017d0cf9cab118914682affected
Linux Linux
Default version status: affected
3.6affected0 to < 3.6unaffected5.10.166 to ≤ 5.10.*unaffected5.15.91 to ≤ 5.15.*unaffected6.1.9 to ≤ 6.1.*unaffected6.2 to ≤ *unaffected