From: Sven Eckelmann <sven@narfation.org> mainline inclusion from mainline-v6.1-rc1 commit 813e62a6fe7539fdf0d8e018d4f157b57bdaeedd category: other bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBPLJA CVE: CVE-2025-21823 Reference: https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commi... -------------------------------- The commit 94dfc73e7cf4 ("treewide: uapi: Replace zero-length arrays with flexible-array members") changed various structures from using 0-length arrays to flexible arrays net/batman-adv/bat_v_elp.c: note: in included file: ./include/linux/ethtool.h:148:38: warning: nested flexible array net/batman-adv/bat_v_elp.c:128:9: warning: using sizeof on a flexible structure In theory, this could be worked around by using {} as initializer for the variable on the stack. But this variable doesn't has to be initialized at all by the caller of __ethtool_get_link_ksettings - everything will be initialized by the callee when no error occurs. Signed-off-by: Sven Eckelmann <sven@narfation.org> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de> Signed-off-by: Zicheng Qu <quzicheng@huawei.com> --- net/batman-adv/bat_v_elp.c | 1 - 1 file changed, 1 deletion(-) diff --git a/net/batman-adv/bat_v_elp.c b/net/batman-adv/bat_v_elp.c index 7af6ffadb2d2..f33f4b3493d4 100644 --- a/net/batman-adv/bat_v_elp.c +++ b/net/batman-adv/bat_v_elp.c @@ -125,7 +125,6 @@ static u32 batadv_v_elp_get_throughput(struct batadv_hardif_neigh_node *neigh) /* if not a wifi interface, check if this device provides data via * ethtool (e.g. an Ethernet adapter) */ - memset(&link_settings, 0, sizeof(link_settings)); rtnl_lock(); ret = __ethtool_get_link_ksettings(hard_iface->net_dev, &link_settings); rtnl_unlock(); -- 2.34.1