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Wed, 18 Feb 2026 15:23:31 +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 4qngK3PZlWnQVgAAD6G6ig (envelope-from ); Wed, 18 Feb 2026 15:23:31 +0000 Date: Wed, 18 Feb 2026 16:23:30 +0100 From: David Sterba To: Jiri Slaby Cc: Jiri Kosina , Greg KH , duoming@zju.edu.cn, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, dsterba@suse.com, 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: <20260218152330.GI26902@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> <20260209102117.GZ26902@suse.cz> 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-Rspamd-Action: no action X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Spamd-Result: default: False [-4.21 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; HAS_REPLYTO(0.30)[dsterba@suse.cz]; R_DKIM_ALLOW(-0.20)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FUZZY_RATELIMITED(0.00)[rspamd.com]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; RCPT_COUNT_TWELVE(0.00)[13]; REPLYTO_DOM_NEQ_TO_DOM(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; DKIM_SIGNED(0.00)[suse.cz:s=susede2_rsa,suse.cz:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; REPLYTO_ADDR_EQ_FROM(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.cz:dkim,suse.cz:mid,suse.cz:replyto]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.cz:+] X-Rspamd-Queue-Id: E99AC5BD15 X-Spam-Flag: NO X-Spam-Score: -4.21 X-Spam-Level: On Tue, Feb 17, 2026 at 09:03:25AM +0100, Jiri Slaby wrote: > Hi, > > On 09. 02. 26, 11:21, David Sterba wrote: > > 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. > > So, would you want to submit the removal? Or anyone else, if you don't > want to lose time with this? (I can do that, if noone wants to.) Let me do it after rc1 so I can finish the journey of this driver which was my first nontrivial contribution to linux kernel.