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Mon, 9 Feb 2026 10:21:18 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id uv2ELR61iWnXLgAAD6G6ig (envelope-from ); Mon, 09 Feb 2026 10:21:18 +0000 Date: Mon, 9 Feb 2026 11:21:17 +0100 From: David Sterba To: Jiri Kosina Cc: Greg KH , duoming@zju.edu.cn, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, dsterba@suse.com, jirislaby@kernel.org, kuba@kernel.org, alexander.deucher@amd.com, akpm@linux-foundation.org, pkshih@realtek.com, tglx@kernel.org, mingo@kernel.org Subject: Re: [PATCH] tty: ipwireless: Fix use-after-free in tasklet during device removal Message-ID: <20260209102117.GZ26902@suse.cz> Reply-To: dsterba@suse.cz References: <20260208062538.29608-1-duoming@zju.edu.cn> <2026020828-unretired-mannish-8465@gregkh> <41b47e38.6ddb4.19c3ccb8e4d.Coremail.duoming@zju.edu.cn> <2026020859-caretaker-duckbill-0fb3@gregkh> Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) X-Spam-Score: -4.00 X-Spamd-Result: default: False [-4.00 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; HAS_REPLYTO(0.30)[dsterba@suse.cz]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; RCPT_COUNT_TWELVE(0.00)[13]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; REPLYTO_ADDR_EQ_FROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.cz:replyto,suse.cz:mid]; RCVD_COUNT_TWO(0.00)[2]; REPLYTO_DOM_NEQ_TO_DOM(0.00)[] X-Spam-Level: X-Spam-Flag: NO On Sun, Feb 08, 2026 at 06:25:38PM +0100, Jiri Kosina wrote: > On Sun, 8 Feb 2026, Greg KH wrote: > > > > I don't have the real hardware. In order to reproduce the bug, I simulate > > > the IPWireless PCMCIA card in the qemu by allocating and configuring the > > > necessary resources(I/O ports, memory regions, interrupts and so on) to > > > correspond with the hardware expected by the driver in the initialization > > > code of the virtual device. > > > > I wonder if this device even is still around, given that pcmcia is all > > but dead for a very long time. > > I doubt that this device is still around anywhere where reasonably new > kernels (including LTS) would matter. > > I don't think I've seen this device (which was back then donated to me by > T-Mobile CZ in order to get it supported in Linux, and I am not sure how > much global adoption it got afterwards) for, let's say, past 15 years :) > > I think (let's see what David, ho took the maintainership over for me > afterwards, has to say) we'd better deprecate and drop the whole thing, > rather than trying to pretend that it's still actively being taken care > of. https://lore.kernel.org/all/20230223172403.GW10580@suse.cz/ last time the question of keeping the driver was asked (2023). Back then I was able to find the cards on second hand market but now I can't on a local market and there's exactly one hit on global eBay. Local linux related or telco support forums seem to mention the driver until 2011 (root.cz, abclinuxu.cz, t-mobile.cz). It does not prove nobody is using it but I think the chances are quite low to justify keeping the driver. It is simple enough to be built as an external module eventually, I can help with that in case somebody really needs that.