tree 6812e51f0cb993f8debdc4b48dd165850b9b4658
parent 6647b338fc5c6741736fe51a25fc2c0bec6398b8
author Eric Dumazet <edumazet@google.com> 1708599013 +0000
committer David S. Miller <davem@davemloft.net> 1708947972 +0000

netlink: hold nlk->cb_mutex longer in __netlink_dump_start()

__netlink_dump_start() releases nlk->cb_mutex right before
calling netlink_dump() which grabs it again.

This seems dangerous, even if KASAN did not bother yet.

Add a @lock_taken parameter to netlink_dump() to let it
grab the mutex if called from netlink_recvmsg() only.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>