90dbd485b3
[ Upstream commit 2fdeee2549231b1f989f011bb18191f5660d3745 ]
The current opt_inst_list operations inside team_nl_cmd_options_set()
is too complex to track:
LIST_HEAD(opt_inst_list);
nla_for_each_nested(...) {
list_for_each_entry(opt_inst, &team->option_inst_list, list) {
if (__team_option_inst_tmp_find(&opt_inst_list, opt_inst))
continue;
list_add(&opt_inst->tmp_list, &opt_inst_list);
}
}
team_nl_send_event_options_get(team, &opt_inst_list);
as while we retrieve 'opt_inst' from team->option_inst_list, it could
be added to the local 'opt_inst_list' for multiple times. The
__team_option_inst_tmp_find() doesn't work, as the setter
team_mode_option_set() still calls team->ops.exit() which uses
->tmp_list too in __team_options_change_check().
Simplify the list operations by moving the 'opt_inst_list' and
team_nl_send_event_options_get() into the nla_for_each_nested() loop so
that it can be guranteed that we won't insert a same list entry for
multiple times. Therefore, __team_option_inst_tmp_find() can be removed
too.
Fixes: 4fb0534fb7bb ("team: avoid adding twice the same option to the event list")
Fixes: 2fcdb2c9e659 ("team: allow to send multiple set events in one message")
Reported-by: syzbot+4d4af685432dc0e56c91@syzkaller.appspotmail.com
Reported-by: syzbot+68ee510075cf64260cc4@syzkaller.appspotmail.com
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.