syzkaller reported an warning of netns ref tracker for RDS TCP listener,
which commit 740ea3c4a0b2 ("tcp: Clean up kernel listener's reqsk in
inet_twsk_purge()") fixed for per-netns ehash.
This series fixes the bug in the partial fix and fixes the reported bug
in the global ehash.
Changes:
v4:
* Add sk_family/refcnt check in inet_twsk_purge().
v3: https://lore.kernel.org/netdev/20240307224423.53315-1-kuniyu@xxxxxxxxxx/
* Drop patch 2, 3, 5
* Fix uaf by iterating ehash and purging reqsk during netns dismantle.
v2: https://lore.kernel.org/netdev/20240227011041.97375-1-kuniyu@xxxxxxxxxx/
* Add patch 1, 3, 5
* Use __sock_create() instead of converting socket
* Drop Sowmini from CC as it's bounced (patchwork may complain)
v1: https://lore.kernel.org/netdev/20240223172448.94084-1-kuniyu@xxxxxxxxxx/
Kuniyuki Iwashima (2):
tcp: Fix use-after-free in inet_twsk_purge().
rds: tcp: Fix use-after-free of net in reqsk_timer_handler().
net/ipv4/inet_timewait_sock.c | 24 +++++++++++++++++++-----
net/ipv4/tcp_minisocks.c | 4 ----
2 files changed, 19 insertions(+), 9 deletions(-)
--
2.30.2
