From: syzbot <syzbot+c92af8613ad38696ff09@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Forwarded: [PATCH] INFO: task hung in ieee80211_register_hw (8)
Date: Wed, 16 Sep 2026 18:22:24 -0700 [thread overview]
Message-ID: <6aab40d0.87c06881.1db2b3.0002.GAE@google.com> (raw)
In-Reply-To: <6aa52208.f81106d8.2ab401.002a.GAE@google.com>
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Subject: [PATCH] INFO: task hung in ieee80211_register_hw (8)
Author: jchuang26@m.fudan.edu.cn
#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git main
Reported-by: syzbot+c92af8613ad38696ff09@syzkaller.appspotmail.com
diff --git a/drivers/net/wireless/virtual/mac80211_hwsim_main.c b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
index 02b6d81cc..cef2f4b08 100644
--- a/drivers/net/wireless/virtual/mac80211_hwsim_main.c
+++ b/drivers/net/wireless/virtual/mac80211_hwsim_main.c
@@ -7150,6 +7150,13 @@ static struct genl_family hwsim_genl_family __ro_after_init = {
.maxattr = HWSIM_ATTR_MAX,
.policy = hwsim_genl_policy,
.netnsok = true,
+ /*
+ * Avoid holding the global genl mutex while creating a radio,
+ * since that takes RTNL in ieee80211_register_hw(). A task
+ * holding RTNL and waiting for the genl mutex would otherwise
+ * deadlock with us.
+ */
+ .parallel_ops = true,
.module = THIS_MODULE,
.small_ops = hwsim_ops,
.n_small_ops = ARRAY_SIZE(hwsim_ops),
next prev parent reply other threads:[~2026-09-17 1:22 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-12 9:57 [syzbot] [wireless?] INFO: task hung in ieee80211_register_hw (8) syzbot
2026-09-14 11:23 ` Forwarded: [PATCH] " syzbot
2026-09-15 1:38 ` syzbot
2026-09-15 5:58 ` syzbot
2026-09-17 1:22 ` syzbot [this message]
2026-09-17 1:44 ` syzbot
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