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| author |   Sven Eckelmann <sven@narfation.org> | 2026-05-14 19:22:02 +0200 |
|---|---|---|
| committer | Sven Eckelmann <sven@narfation.org> | 2026-05-19 08:44:24 +0200 |
| commit | 20c2d6a20ca936f5aaa6dd40f73f262ac45c87cc (patch) | |
| tree | 5d7430910bf353030cbeb4e5e0c5bed382b36370 /tools/testing/selftests/dm-verity/git:/ssh:/git@git.zx2c4.com | |
| parent | batman-adv: tp_meter: avoid role confusion in tp_list (diff) | |
batman-adv: mcast: fix use-after-free in orig_node RCU release
batadv_mcast_purge_orig() removes entries from RCU-protected hlists but
does not wait for an RCU grace period before returning. Concurrent RCU
readers may still accesses references to those entries at the point of
removal. RCU-protected readers trying to operate on entries like
orig->mcast_want_all_ipv6_node will then access already freed memory.
Fix this by moving batadv_mcast_purge_orig() to batadv_orig_node_release(),
just before the call_rcu() invocation. This ensures RCU readers that were
active at purge time have drained before the orig_node memory is reclaimed.
Cc: stable@kernel.org
Fixes: ab49886e3da7 ("batman-adv: Add IPv4 link-local/IPv6-ll-all-nodes multicast support")
Acked-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Diffstat (limited to 'tools/testing/selftests/dm-verity/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions