wifi: libertas: fix WARNING in usb_tx_block

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[ Upstream commit d66676e6ca ]

The function usb_tx_block() submits cardp->tx_urb without ensuring that
any previous transmission on this URB has completed. If a second call
occurs while the URB is still active (e.g. during rapid firmware loading),
usb_submit_urb() detects the active state and triggers a warning:
'URB submitted while active'.

Fix this by enforcing serialization: call usb_kill_urb() before
submitting the new request. This ensures the URB is idle and safe to reuse.

Reported-by: syzbot+67969ab6a2551c27f71b@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=67969ab6a2551c27f71b
Signed-off-by: Szymon Wilczek <swilczek.lx@gmail.com>
Link: https://patch.msgid.link/20251221155806.23925-1-swilczek.lx@gmail.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Szymon Wilczek 2025-12-21 16:58:06 +01:00 • committed by Sasha Levin

parent 939dc5edda

commit b820735643

1 changed files with 2 additions and 0 deletions

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drivers/net/wireless/marvell/libertas/if_usb.c

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