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Mon, 04 May 2026 09:24:27 -0700 (PDT) Received: from archtop.localdomain ([2a01:599:912:6541:1453:2633:891c:c05f]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48a8fede418sm105107585e9.6.2026.05.04.09.24.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2026 09:24:26 -0700 (PDT) From: Jakov Novak To: jeff.johnson@oss.qualcomm.com Cc: dcbw@redhat.com, jakovnovak30@gmail.com, johannes@sipsolutions.net, kees@kernel.org, libertas-dev@lists.infradead.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, linville@tuxdriver.com, mingo@kernel.org, skhan@linuxfoundation.org, swilczek.lx@gmail.com, syzbot+c99d17aa44dbdba16ad2@syzkaller.appspotmail.com, tglx@kernel.org Subject: [PATCH v3] wifi: libertas: add wake_up() call to properly notify Date: Mon, 4 May 2026 18:23:57 +0200 Message-ID: <20260504162356.17250-2-jakovnovak30@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Currently, when the firmware is not fully loaded and if_usb_disconnect is called, if_usb_prog_firmware gets stuck waiting for cardp->surprise_removed or cardp->fwdnldover while lbs_remove_card also waits for the firmware loading to be completed, which never happens. This caused the reported syzbot bug. To address this, the wake_up function call can be added in the if_usb_disconnect function which notifies the if_usb_prog_firmware thread and resolves the firmware loading. Fixes: 954ee164f4f4 ("[PATCH] libertas: reorganize and simplify init sequence") Reported-and-tested-by: syzbot+c99d17aa44dbdba16ad2@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=c99d17aa44dbdba16ad2 Signed-off-by: Jakov Novak --- drivers/net/wireless/marvell/libertas/if_usb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/marvell/libertas/if_usb.c b/drivers/net/wireless/marvell/libertas/if_usb.c index 4fae0e335136..22f0bd6a141a 100644 --- a/drivers/net/wireless/marvell/libertas/if_usb.c +++ b/drivers/net/wireless/marvell/libertas/if_usb.c @@ -310,6 +310,7 @@ static void if_usb_disconnect(struct usb_interface *intf) struct lbs_private *priv = cardp->priv; cardp->surprise_removed = 1; + wake_up(&cardp->fw_wq); if (priv) { lbs_stop_card(priv); -- 2.54.0